HALOZYME THERAPEUTICS, INC., 10-K filed on 2/20/2024
Annual Report
v3.24.0.1
Cover - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2023
Feb. 12, 2024
Jun. 30, 2023
Cover [Abstract]      
Entity Central Index Key 0001159036    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-32335    
Entity Registrant Name HALOZYME THERAPEUTICS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 88-0488686    
Entity Address, Address Line One 12390 El Camino Real    
Entity Address, City or Town San Diego    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 92130    
City Area Code 858    
Local Phone Number 794-8889    
Title of 12(b) Security Common Stock, $0.001 Par Value    
Trading Symbol HALO    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 3.5
Entity Common Stock, Shares Outstanding   126,824,800  
v3.24.0.1
Audit Information
12 Months Ended
Dec. 31, 2023
Auditor Information [Abstract]  
Auditor Name Ernst & Young LLP
Auditor Location San Diego, California
Auditor Firm ID 42
v3.24.0.1
Consolidated Balance Sheets - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Current assets    
Cash and cash equivalents $ 118,370,000 $ 234,195,000
Marketable securities, available-for-sale 217,630,000 128,599,000
Accounts receivable, net and other contract assets 234,210,000 231,072,000
Inventories, net 127,601,000 100,123,000
Prepaid expenses and other current assets 48,613,000 45,024,000
Total current assets 746,424,000 739,013,000
Property and equipment, net 74,944,000 75,570,000
Prepaid expenses and other assets 17,816,000 26,301,000
Goodwill 416,821,000 409,049,000
Intangible assets, net 472,879,000 546,652,000
Deferred tax assets, net 4,386,000 44,426,000
Restricted cash 0 500,000
Total assets 1,733,270,000 1,841,511,000
Current liabilities    
Accounts payable 11,816,000 17,693,000
Accrued expenses 100,678,000 99,762,000
Current portion of long-term debt, net 0 13,334,000
Total current liabilities 112,494,000 130,789,000
Long-term debt, net 1,499,248,000 1,492,766,000
Other long-term liabilities 37,720,000 32,686,000
Contingent liability 0 15,472,000
Total liabilities 1,649,462,000 1,671,713,000
Commitments and contingencies (Note 12)
Stockholders’ equity    
Preferred stock - $0.001 par value; 20,000 shares authorized; no shares issued and outstanding 0 0
Common stock - $0.001 par value; 300,000 shares authorized; 126,770 and 135,154 shares issued and outstanding as of December 31, 2023 and 2022, respectively 127,000 135,000
Additional paid-in capital 2,409,000 27,368,000
Accumulated other comprehensive loss (9,278,000) (922,000)
Retained earnings 90,550,000 143,217,000
Total stockholders’ equity 83,808,000 169,798,000
Total liabilities and stockholders’ equity $ 1,733,270,000 $ 1,841,511,000
v3.24.0.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Preferred stock, par value (usd per share) $ 0.001 $ 0.001
Preferred stock authorized (shares) 20,000,000 20,000,000
Preferred stock issued (shares) 0 0
Preferred stock outstanding (shares) 0 0
Common stock, par value (usd per share) $ 0.001 $ 0.001
Common stock authorized (shares) 300,000,000 300,000,000
Common stock issued (shares) 126,770,000 135,154,000
Common stock outstanding (shares) 126,770,000 135,154,000
v3.24.0.1
Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Revenues      
Total revenues $ 829,253 $ 660,116 $ 443,310
Operating expenses      
Cost of sales 192,361 139,304 81,413
Amortization of intangible assets 73,773 43,148 0
Research and development 76,363 66,607 35,672
Selling, general and administrative 149,182 143,526 50,323
Total operating expenses 491,679 392,585 167,408
Operating income 337,574 267,531 275,902
Other income (expense)      
Investment and other income, net 16,317 1,046 1,102
Induced conversion expense related to convertible notes 0 (2,712) (20,960)
Contingent liability fair value measurement gain 13,200 0 0
Interest expense (18,762) (16,947) (7,526)
Net income before income taxes 348,329 248,918 248,518
Income tax expense (benefit) 66,735 46,789 (154,192)
Net income $ 281,594 $ 202,129 $ 402,710
Earnings per share      
Basic (usd per share) $ 2.13 $ 1.48 $ 2.86
Diluted (usd per share) $ 2.10 $ 1.44 $ 2.74
Weighted average common shares outstanding      
Basic (in shares) 131,927 136,844 140,646
Diluted (shares) 134,197 140,608 146,796
Royalties      
Revenues      
Total revenues $ 447,865 $ 360,475 $ 203,900
Product sales, net      
Revenues      
Total revenues 300,854 191,030 104,224
Revenues under collaborative agreements      
Revenues      
Total revenues $ 80,534 $ 108,611 $ 135,186
v3.24.0.1
Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Statement of Comprehensive Income [Abstract]      
Net income $ 281,594 $ 202,129 $ 402,710
Other comprehensive income      
Unrealized gain (loss) on marketable securities 1,097 (349) (683)
Foreign currency translation adjustment 24 8 15
Unrealized gain on foreign currency 3 39 26
Unrealized loss on derivative instruments, net (9,406) 0 0
Realized gain on derivative instruments, net (74) 0 0
Comprehensive income $ 273,238 $ 201,827 $ 402,068
v3.24.0.1
Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Operating activities      
Net income $ 281,594 $ 202,129 $ 402,710
Adjustments to reconcile net income to net cash provided by operating activities:      
Share-based compensation 36,620 24,397 20,820
Depreciation and amortization 11,083 6,493 2,997
Amortization of intangible assets 73,773 43,148 0
Total amortization of debt discount 7,304 7,839 3,642
Amortization of (premium) discounts on marketable securities, net (6,319) 1,106 2,257
Realized loss on marketable securities 0 1,727 0
Loss on disposal of equipment 611 129 0
Contingent liability fair value measurement adjustment (13,200) 0 0
Recognition of deferred revenue 0 (2,494) (1,496)
Lease payments deferred 1,270 (903) (751)
Induced conversion expense related to convertible notes 0 2,712 20,960
Deferred income taxes (including benefit from valuation allowance release) 34,506 40,005 (155,434)
Other 0 (227) (3)
Changes in operating assets and liabilities      
Accounts receivable, net and other contract assets (3,339) (83,941) 6,755
Inventories, net (26,884) (17,481) 7,371
Prepaid expenses and other assets 4,098 (9,064) (11,555)
Accounts payable and accrued expenses (12,546) 24,535 1,167
Net cash provided by operating activities 388,571 240,110 299,440
Investing activities      
Purchases of marketable securities (292,911) (255,208) (652,515)
Proceeds from sales and maturities of marketable securities 211,296 746,127 247,683
Acquisitions of business, net of cash acquired 0 999,120 0
Purchases of property and equipment (15,294) (4,810) (1,457)
Proceeds from sale of assets 0 26,006 0
Net cash used in investing activities (96,909) (487,005) (406,289)
Financing activities      
Proceeds from term loan 0 250,000 0
Repayment of term loan 0 (250,000) 0
Proceeds from revolving credit facilities 0 120,000 0
Repayment of revolving credit facilities 0 120,000 0
Proceeds from issuance of 2027 Convertible Notes, net 0 0 784,875
Repayment of 2024 Convertible Notes 13,483 77,453 369,064
Proceeds from issuance of 2028 Convertible Notes, net 0 702,000 0
Purchase of capped call 0 (69,120) 0
Payment of debt issuance cost 0 (7,104) (424)
Repurchase of common stock (402,383) (200,002) (350,058)
Proceeds from issuance of common stock under equity incentive plans, net of taxes paid related to net share settlement 7,879 14,050 12,536
Net cash (used in) provided by financing activities (407,987) 362,371 77,865
Net (decrease) increase in cash, cash equivalents and restricted cash (116,325) 115,476 (28,984)
Cash, cash equivalents and restricted cash at beginning of period 234,695 119,219 148,203
Cash, cash equivalents and restricted cash at end of period 118,370 234,695 119,219
Supplemental disclosure of cash flow information      
Interest paid 11,410 6,107 3,296
Income taxes paid (received), net 31,756 16,224 (375)
Supplemental disclosure of non-cash investing and financing activities      
Amounts accrued for purchases of property and equipment 25 6,229 72
Right-of-use assets obtained in exchange for lease obligation 2,572 34,435 318
Common stock issued for conversion of 2024 Convertible Notes $ 125 $ 1,018 $ 7,865
v3.24.0.1
Consolidated Statements of Stockholders' Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Retained Earnings (Accumulated Deficit)
Adjustment
Adjustment
Additional Paid-In Capital
Adjustment
Retained Earnings (Accumulated Deficit)
Beginning Balance, shares outstanding (in shares) at Dec. 31, 2020   135,030            
Beginning Balance at Dec. 31, 2020 $ 151,047 $ 135 $ 625,483 $ 22 $ (474,593) $ (52,564) $ (65,535) $ 12,971
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Share-based compensation expense 20,820   20,820          
Issuance of common stock for the conversion of 2024 Convertible Notes (shares)   9,083            
Issuance of common stock for the conversion of 2024 Convertible Notes 13,104 $ 9 13,095          
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan (in shares)   1,497            
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan 12,536 $ 2 12,534          
Repurchase of common stock (in shares)   (8,112)            
Repurchase of common stock (350,058) $ (8) (350,050)          
Other comprehensive income (loss) (642)     (642)        
Net income 402,710              
Ending Balance, shares outstanding (in shares) at Dec. 31, 2021   137,498            
Ending Balance at Dec. 31, 2021 196,953 $ 138 256,347 (620) (58,912)      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Share-based compensation expense 24,397   24,397          
Issuance of common stock for the conversion of 2024 Convertible Notes (shares)   1,512            
Issuance of common stock for the conversion of 2024 Convertible Notes 1,693 $ 1 1,692          
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan (in shares)   1,077            
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan 14,050 $ 1 14,049          
Capped call transaction (69,120)   (69,120)          
Repurchase of common stock (in shares)   (4,933)            
Repurchase of common stock (200,002) $ (5) (199,997)          
Other comprehensive income (loss) (302)     (302)        
Net income 202,129       202,129      
Ending Balance, shares outstanding (in shares) at Dec. 31, 2022   135,154            
Ending Balance at Dec. 31, 2022 169,798 $ 135 27,368 (922) 143,217      
Increase (Decrease) in Stockholders' Equity [Roll Forward]                
Share-based compensation expense 36,620   36,620          
Issuance of common stock for the conversion of 2024 Convertible Notes (shares)   289            
Issuance of common stock for the conversion of 2024 Convertible Notes (126) $ 0 (126)          
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan (in shares)   945            
Issuance of common stock pursuant to exercise of stock options and vesting of restricted stock and performance stock units, net and shares issued under the ESPP plan 7,879 $ 2 7,877          
Repurchase of common stock (in shares)   (9,618)            
Repurchase of common stock (403,601) $ (10) (69,330)   (334,261)      
Other comprehensive income (loss) (8,356)     (8,356)        
Net income 281,594       281,594      
Ending Balance, shares outstanding (in shares) at Dec. 31, 2023   126,770            
Ending Balance at Dec. 31, 2023 $ 83,808 $ 127 $ 2,409 $ (9,278) $ 90,550      
v3.24.0.1
Organization and Business
12 Months Ended
Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization and Business Organization and Business
Halozyme Therapeutics, Inc. is a biopharmaceutical company advancing disruptive solutions to improve patient experiences and outcomes for emerging and established therapies.
As the innovators of ENHANZE ® drug delivery technology (“ENHANZE”) with our proprietary enzyme, rHuPH20, our commercially validated solution is used to facilitate the subcutaneous (“SC”) delivery of injected drugs and fluids with the goal of reducing the treatment burden for patients. We license our technology to biopharmaceutical companies to collaboratively develop products that combine ENHANZE® with our partners’ proprietary compounds. We also develop, manufacture and commercialize, for ourselves or with our partners, drug-device combination products using our advanced auto-injector technologies that are designed to provide commercial or functional advantages such as improved convenience, reliability and tolerability, and enhanced patient comfort and adherence.
Our ENHANZE partners’ approved products and product candidates are based on rHuPH20, our patented recombinant human hyaluronidase enzyme. rHuPH20 works by breaking down hyaluronan (“HA”), a naturally occurring carbohydrate that is a major component of the extracellular matrix of the SC space. This temporarily reduces the barrier to bulk fluid flow allowing for improved and more rapid SC delivery of high dose, high volume injectable biologics, such as monoclonal antibodies and other large therapeutic molecules, as well as small molecules and fluids. We refer to the application of rHuPH20 to facilitate the delivery of other drugs or fluids as ENHANZE. We license the ENHANZE technology to form collaborations with biopharmaceutical companies that develop or market drugs requiring or benefiting from injection via the SC route of administration. In the development of proprietary intravenous (“IV”) drugs combined with our ENHANZE technology, data has been generated supporting the potential for ENHANZE to reduce patient treatment burden, as a result of shorter duration of SC administration with ENHANZE compared to IV administration. ENHANZE may enable fixed-dose SC dosing compared to weight-based dosing typically required for IV administration, extend the dosing interval for drugs that are already administered subcutaneously and potentially allow for lower rates of infusion-related reactions. ENHANZE may enable more flexible treatment options such as home administration by a healthcare professional or potentially the patient or caregiver. Lastly, certain proprietary drugs co-formulated with ENHANZE have been granted additional exclusivity, extending the patent life of the product beyond the patent expiry of the proprietary IV drug.
We currently have ENHANZE collaborations and licensing agreements with F. Hoffmann-La Roche, Ltd. and Hoffmann-La Roche, Inc. (“Roche”), Takeda Pharmaceuticals International AG and Baxalta US Inc. (“Takeda”), Pfizer Inc. (“Pfizer”), Janssen Biotech, Inc. (“Janssen”), AbbVie, Inc. (“AbbVie”), Eli Lilly and Company (“Lilly”), Bristol-Myers Squibb Company (“BMS”), argenx BVBA (“argenx”), ViiV Healthcare (the global specialist HIV Company majority owned by GlaxoSmithKline) (“ViiV”), Chugai Pharmaceutical Co., Ltd (“Chugai”) and Acumen Pharmaceuticals, Inc. (“Acumen”). In addition to receiving upfront licensing fees from our ENHANZE collaborations, we are entitled to receive event and sales-based milestone payments, revenues from the sale of bulk rHuPH20 and royalties from commercial sales of approved partner products co-formulated with ENHANZE. We currently earn royalties from four of these collaborations, including royalties from sales of one product from the Takeda collaboration, four products from the Roche collaboration, one product from the Janssen collaboration and one product from the argenx collaboration.
We have commercialized auto-injector products with several pharmaceutical companies including Teva Pharmaceutical Industries, Ltd. (“Teva”) and Otter Pharmaceuticals, LLC (“Otter”). We have development programs including auto-injectors with Idorsia Pharmaceuticals Ltd. (“Idorsia”).
Our commercial portfolio of proprietary products includes Hylenex®, utilizing rHuPH20, and our specialty product XYOSTED®, utilizing our auto-injector technology.
Except where specifically noted or the context otherwise requires, references to “Halozyme,” “the Company,” “we,” “our,” and “us” in these notes to consolidated financial statements refer to Halozyme Therapeutics, Inc. and each of its directly and indirectly wholly owned subsidiaries as disclosed in Note 2, Summary of Significant Accounting Policies.
v3.24.0.1
Summary of Significant Accounting Policies
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Summary of Significant Accounting Policies Summary of Significant Accounting Policies
Basis of Presentation
The consolidated financial statements include the accounts of Halozyme Therapeutics, Inc. and our wholly owned subsidiaries, Halozyme, Inc. and Antares Pharma, Inc., and Antares Pharma, Inc.’s wholly owned Swiss subsidiaries, Antares Pharma IPL AG and Antares Pharma AG. All intercompany accounts and transactions have been eliminated.
Use of Estimates
The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires us to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate our estimates and judgments, which are based on historical and anticipated results and trends and on various other assumptions that we believe to be reasonable under the circumstances. By their nature, estimates are subject to an inherent degree of uncertainty and, as such, actual results may differ from our estimates.
Cash Equivalents and Marketable Securities
Cash equivalents consist of highly liquid investments, readily convertible to cash, which mature within 90 days or less from the date of purchase. As of December 31, 2023, our cash and cash equivalents consisted of money market funds, bank certificate of deposits, U.S. treasury securities and demand deposits at commercial banks.
Marketable securities are investments with original maturities of more than 90 days from the date of purchase that are specifically identified to fund current operations. Marketable securities are considered available-for-sale. These investments are classified as current assets, even though the stated maturity date may be one year or more beyond the current balance sheet date which reflects management’s intention to use the proceeds from the sale of these investments to fund our operations, as necessary. Such available-for-sale investments are carried at fair value with unrealized gains and losses recorded in other comprehensive income (loss) and included as a separate component of stockholders’ equity. The cost of marketable securities is adjusted for amortization of premiums or accretion of discounts to maturity, and such amortization or accretion is included in investment and other income, net in our consolidated statements of income. We use the specific identification method for calculating realized gains and losses on marketable securities sold. None of the realized gains and losses and declines in value that were judged to be as a result of credit loss on marketable securities, if any, are included in investment and other income, net in our consolidated statements of income.
Restricted Cash
Under the lease terms of our facilities, we may be required to maintain letters of credit as security deposits during the terms of such leases. As of December 31, 2023, no restricted cash remained pledged as collateral for the letters of credit as the associated lease was terminated. As of December 31, 2022, restricted cash of $0.5 million was pledged as collateral for the letters of credit.
Fair Value of Financial Instruments
The authoritative guidance for fair value measurements establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.
Our financial instruments include cash equivalents, available-for-sale marketable securities, accounts receivable, prepaid expenses and other assets, accounts payable, accrued expenses and long-term debt. Fair value estimates of these instruments are made at a specific point in time based on relevant market information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and therefore, cannot be determined with precision. The carrying amount of cash equivalents, accounts receivable, prepaid expenses and other assets, accounts payable and accrued expenses are generally considered to be representative of their respective fair values because of the short-term nature of those instruments.
Available-for-sale marketable securities consist of asset-backed securities, corporate debt securities, U.S. Treasury securities, agency bonds and commercial paper, and are measured at fair value using Level 1 and Level 2 inputs. Level 2 financial instruments are valued using market prices on less active markets and proprietary pricing valuation models with observable inputs, including interest rates, yield curves, maturity dates, issue dates, settlement dates, reported trades, broker-dealer quotes, issue spreads, benchmark securities or other market related data. We obtain the fair value of Level 2 investments from our investment manager, who obtains these fair values from a third-party pricing source. We validate the fair values of Level 2 financial instruments provided by our investment manager by comparing these fair values to a third-party pricing source.
Concentrations of Credit Risk, Sources of Supply and Significant Customers
We are subject to credit risk from our portfolio of cash equivalents and marketable securities. These investments were made in accordance with our investment policy which specifies the categories, allocations, and ratings of securities we may consider for investment. The primary objective of our investment activities is to preserve principal while at the same time maximizing the income we receive without significantly increasing risk. We maintain our cash and cash equivalent balances with two major commercial banks and marketable securities with one other financial institution. Deposits held with the financial institutions exceed the amount of insurance provided on such deposits. We are exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and marketable securities to the extent recorded on the consolidated balance sheets.
We are also subject to credit risk from our accounts receivable related to our product sales and revenues under our license and collaborative agreements. We have license and collaborative agreements with pharmaceutical companies under which we receive payments for royalties, license fees, milestone payments for specific achievements designated in the collaborative agreements, reimbursements of research and development services and supply of bulk formulation of rHuPH20. In addition, we sell proprietary products in the United States (“U.S.”) to a limited number of established wholesale distributors in the pharmaceutical industry. Credit is extended based on an evaluation of the customer’s financial condition, and collateral is not required. Management monitors our exposure to accounts receivable by periodically evaluating the collectability of the accounts receivable based on a variety of factors including the length of time the receivables are past due, the financial health of the customer and historical experience. Based upon the review of these factors, we recorded no allowance for doubtful accounts as of December 31, 2023 and 2022. Approximately 69% of the accounts receivable balance as of December 31, 2023 represents amounts due from Janssen, Roche and Teva. Approximately 52% of the accounts receivable balance as of December 31, 2022 represents amounts due from Janssen and Roche.
The following table indicates the percentage of total revenues in excess of 10% with any single customer:
Year Ended December 31,
202320222021
Partner A
44%46%48%
Partner B
19%20%25%
Partner C
10%—%—%
Partner D
—%—%10%
We attribute revenues under collaborative agreements, including royalties, to the individual countries where the customer is headquartered. We attribute revenues from product sales to the individual countries to which the product is shipped. Worldwide revenues from external customers are summarized by geographic location in the following table (in thousands):
Year Ended December 31,
202320222021
United States$587,196 $437,989 $293,089 
Switzerland149,024 166,836 134,117 
Belgium58,354 2,088 199 
Japan15,096 47,939 11,934 
All other foreign19,583 5,264 3,971 
Total revenues$829,253 $660,116 $443,310 
Accounts Receivable, net
Accounts receivable is recorded at the invoiced amount and is non-interest bearing. Accounts receivable is recorded net of cash discounts for prompt payment, distribution fees and chargebacks. We recorded no allowance for doubtful accounts as of December 31, 2023 and 2022 as the collectability of accounts receivable was reasonably assured.
Inventories
Inventories are stated at lower of cost or net realizable value. Cost is determined on a first-in, first-out basis. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Inventories are reviewed periodically for potential excess, dated or obsolete status. We evaluate the carrying value of inventories on a regular basis, taking into account such factors as historical and anticipated future sales compared to quantities on hand, the price we expect to obtain for products in their respective markets compared with historical cost and the remaining shelf life of goods on hand.
Leases
We have entered into operating leases primarily for real estate and automobiles. These leases have contractual terms which range from 3 years to 12 years. We determine if an arrangement contains a lease at inception. Right of use (“ROU”) assets and liabilities resulting from operating leases are included in property and equipment, accrued expenses and other long-term liabilities on our consolidated balance sheets. Operating lease ROU assets and liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the discount rate to calculate the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. Our leases often include options to extend or terminate the lease. These options are included in the lease term when it is reasonably certain that we will exercise that option. Short-term leases with an initial term of 12 months or less are not recorded on the balance sheet. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.
We have lease agreements with lease and non-lease components, which are generally accounted for separately. For certain leases, such as automobiles, we account for the lease and non-lease components as a single lease component.
Property and Equipment, Net
Property and equipment, including ROU assets are recorded at cost, less accumulated depreciation and amortization. Equipment is depreciated using the straight-line method over its estimated useful life ranging from three years to ten years and leasehold improvements are amortized using the straight-line method over the estimated useful life of the asset or the lease term, whichever is shorter.
Impairment of Long-Lived Assets
We account for long-lived assets in accordance with authoritative guidance for impairment or disposal of long-lived assets. Long-lived assets are reviewed for events or changes in circumstances, which indicate that their carrying value may not be recoverable.
Comprehensive Income
Comprehensive income is defined as the change in equity during the period from transactions and other events and circumstances from non-owner sources.
Convertible Notes
The 2024 Convertible Notes, the 2027 Convertible Notes and the 2028 Convertible Notes (collectively, the “Convertible Notes”) are accounted for in accordance with authoritative guidance for debt and derivatives. We evaluate all the embedded conversion options contained in the Convertible Notes to determine if there are embedded features that require bifurcation as a derivative as required by U.S. GAAP. Based on our analysis, we account for each of our Convertible Notes as single units of accounting, a liability, because we concluded that the conversion features do not require bifurcation as a derivative under embedded derivative authoritative guidance.
Cash Flow Hedges - Currency Risks
Beginning in the second quarter of 2023, we entered into a cash flow hedging program to mitigate foreign currency exchange risk associated with forecasted royalty revenue denominated in Swiss francs. Under the program, we can hedge these forecasted royalties up to a maximum of four years into the future. We hedge these cash flow exposures to reduce the risk of our earnings and cash flows being adversely affected by fluctuations in exchange rates.
In accordance with the hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and are highly effective in offsetting changes to future cash flows on hedged transactions. Both at inception of the hedge and on an ongoing basis, we assess whether the foreign currency forward contracts are highly effective in offsetting changes in cash flows of hedged items on a prospective and retrospective basis. If we determine a (i) foreign currency forward contract is not highly effective as a cash flow hedge, (ii) foreign currency forward contract has ceased to be a highly effective hedge or (iii) forecasted transaction is no longer probable of occurring, we would discontinue hedge accounting treatment prospectively. We measure effectiveness based on the change in fair value of the forward currency forward contract and the fair value of the hypothetical foreign currency forward contract with terms that match the critical terms of the risk being hedged. No portion of our foreign currency forward contracts were excluded from the assessment of hedge effectiveness. As of December 31, 2023, all hedges were determined to be highly effective.
The assets or liabilities associated with our hedging contracts are recorded at fair market value in prepaid expense and other current assets, accrued expenses, or other long-term liabilities, respectively, in our consolidated balance sheets. Gains and losses related to changes in the fair market value of these hedging contracts are recorded as a component of accumulated other comprehensive income (loss) (“AOCI”) within stockholder’s equity in our consolidated balance sheets and reclassified to royalty revenue in our consolidated statements of income in the same period as the recognition of the underlying hedged transaction. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, within the defined hedge period, we reclassify the gains or losses on the related cash flow hedge from AOCI to royalties revenue in our consolidated statements of income. Settlements from the cash flow hedge are included in operating activities on the Consolidated Statements of Cash Flows. Since the fair market value of these hedging contracts is derived from current market rates, the hedging contracts are classified as derivative financial instruments. We do not use derivatives for speculative or trading purposes. As of December 31, 2023, amounts expected to be recognized as a net gain out of AOCI into our consolidated statements of income during the next 12 months, are not material.
Business Combinations
Under the acquisition method of accounting, we allocate the fair value of the total consideration transferred to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values on the date of acquisition. These valuations require us to make estimates and assumptions, especially with respect to intangible assets. We record the excess consideration over the aggregate fair value of tangible and intangible assets, net of liabilities assumed, as goodwill. Costs incurred to complete a business combination, such as legal and other professional fees, are expensed as incurred.
If the initial accounting for a business combination is incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. We record these adjustments to the provisional amounts with a corresponding offset to goodwill. Any adjustments identified after the measurement period are recorded in our consolidated statements of income.
Goodwill, Intangible Assets and Other Long-Lived Asset
Assets acquired, including intangible assets and in-process research and development (“IPR&D”), and liabilities assumed are measured at fair value as of the acquisition date. Goodwill, which has an indefinite useful life, represents the excess of cost over fair value of the net assets acquired. Intangible assets acquired in a business combination that are used for IPR&D activities are considered indefinite lived until the completion or abandonment of the associated research and development efforts. Upon reaching the end of the relevant research and development project (i.e., upon commercialization), the IPR&D asset is amortized over its estimated useful life. If the relevant research and development project is abandoned, the IPR&D asset is expensed in the period of abandonment.
Goodwill and IPR&D are not amortized; however, they are reviewed for impairment at least annually during the second quarter, or more frequently if an event occurs indicating the potential for impairment. Goodwill and IPR&D are considered to be impaired if the carrying value of the reporting unit or IPR&D asset exceeds its respective fair value.
We perform our goodwill impairment analysis at the reporting unit level, which aligns with our reporting and operating segment structure and availability of discrete financial information. During the goodwill impairment review, we assess qualitative factors to determine whether it is more likely than not that the fair values of our reporting unit is less than the
carrying amount, including goodwill. The qualitative factors include, but are not limited to, macroeconomic conditions, industry and market considerations, and our overall financial performance. If, after assessing the totality of these qualitative factors, we determine that it is not more likely than not that the fair value of our reporting unit is less than the carrying amounts, then no additional assessment is deemed necessary. Otherwise, we proceed to compare the estimated fair value of the reporting unit with the carrying value, including goodwill. If the carrying amount of the reporting unit exceeds the fair value, we record an impairment loss based on the difference. We may elect to bypass the qualitative assessment in a period and proceed to perform the quantitative goodwill impairment test.
Our identifiable intangible assets with finite useful lives are typically comprised of acquired device technologies and product rights. The cost of identifiable intangible assets with finite lives is generally amortized on a straight-line basis over the assets’ respective estimated useful lives.
We perform regular reviews to determine if any event has occurred that may indicate intangible assets with finite useful lives and other long-lived assets are potentially impaired. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are not recoverable, we estimate the fair value of the assets and record an impairment loss if the carrying value of the assets exceeds the fair value. Factors that may indicate potential impairment include a significant decline in our stock price and market capitalization compared to the net book value, significant changes in the ability of a particular asset to generate positive cash flows for our strategic business objectives, and the pattern of utilization of a particular asset.
Revenue Recognition
We generate revenues from payments received (i) as royalties from licensing our ENHANZE technology and other royalty arrangements, (ii) under collaborative agreements and (iii) from sales of our proprietary and partnered products. We recognize revenue when we transfer promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. To determine revenue recognition for contracts with customers, we perform the following five steps: (i) identify the promised goods or services in the contract; (ii) identify the performance obligations in the contract, including whether they are distinct in the context of the contract; (iii) determine the transaction price, including the constraint on variable consideration; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy the performance obligations.
ENHANZE and Device Royalties
Under the terms of our ENHANZE collaboration and license agreements, our partners will pay us royalties at an on average mid-single digit percent rate of their sales if products under the collaboration are commercialized. All amounts owed to us are noncancelable after the underlying triggering event occurs, and nonrefundable once paid. Unless terminated earlier in accordance with its terms, collaborations generally continue in effect until the last to expire royalty payment term, as determined on a product by product and country by country basis, with each royalty term starting on the first commercial sale of that product and ending the later of: (i) a specified period or term set forth in the agreement or (ii) expiration of the last to expire of the valid claims of our patents covering rHuPH20 or other specified patents developed under the collaboration which valid claim covers a product developed under the collaboration. In general, when there are no valid claims of a specified patent developed under the collaboration covering the product in a given country, the royalty rate is reduced for those sales in that country upon the expiration of our patents covering rHuPH20. Janssen’s patents covering DARZALEX SC do not impact the timing for this royalty reduction. Partners may terminate the agreement prior to expiration for any reason in its entirety or on a target-by-target basis generally upon 90 days prior written notice to us. Upon any such termination, the license granted to partners (in total or with respect to the terminated target, as applicable) will terminate provided; however, that in the event of expiration of the agreement (as opposed to a termination), the on-going licenses granted will become perpetual, non-exclusive and fully paid. Sales-based milestones and royalties are recognized in the period the underlying sales or milestones occur. We do not receive final royalty reports from our ENHANZE partners until after we complete our financial statements for a prior quarter. Therefore, we recognize revenue based on estimates of the royalty earned, which are based on internal estimates and available preliminary reports provided by our partners. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.
We also earn royalties in connection with several of our licenses granted under license and development arrangements with our device partners. These royalties are based upon a percentage of commercial sales of partnered products with rates ranging from mid-single digits to low double digits and are tiered based on levels of net sales. These sales-based royalties, for which the license was deemed the predominant element to which the royalties relate, are estimated and recognized in the period in which the partners’ commercial sales occur. The royalties are generally reported and payable to us within 45 to 60 days after the end of the period in which the commercial sales are made. We base our estimates of royalties earned on actual sales information from our partners when available or estimated, prescription sales from external sources and estimated net selling
price. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.
Revenue under ENHANZE and Device Collaborative Agreements
ENHANZE Collaboration and License Agreements
Under these agreements, we grant the collaboration partner a worldwide license to develop and commercialize products using our ENHANZE technology to combine our patented rHuPH20 enzyme with their proprietary biologics directed at up to a specified number of targets. Targets are usually licensed on an exclusive, global basis. Targets selected subsequent to inception of the arrangement generally require payment of an additional license fee. The collaboration partner is responsible for all development, manufacturing, clinical, regulatory, sales and marketing costs for any products developed under the agreement. We are responsible for supply of bulk rHuPH20 based on the collaboration partner’s purchase orders, and may also be separately engaged to perform research and development services. While these collaboration agreements are similar in that they originate from the same framework, each one is the result of an arms-length negotiation and thus may vary from one to the other.
We generally collect an upfront license payment from collaboration partners, and are also entitled to receive event-based payments subject to collaboration partners’ achievement of specified development, regulatory and sales-based milestones. In several agreements, collaboration partners pay us annual fees to maintain their exclusive license rights if they are unable to advance product development to specified stages. We earn separate fees for bulk rHuPH20 supplies and research and development services.
Although these agreements are in form identified as collaborative agreements, we concluded for accounting purposes they represent contracts with customers and are not subject to accounting literature on collaborative arrangements. This is because we grant to partners licenses to our intellectual property and provide supply of bulk rHuPH20 and research and development services which are all outputs of our ongoing activities, in exchange for respective consideration. Under these collaborative agreements, our partners lead development of assets, and we do not share in significant financial risks of their development or commercialization activities. Accordingly, we concluded our collaborative agreements are appropriately accounted for pursuant to U.S. GAAP.
Under all of our ENHANZE collaborative agreements, we have identified licenses to use functional intellectual property as the only performance obligation. The intellectual property underlying the license is our proprietary ENHANZE technology which represents application of rHuPH20 to facilitate delivery of drugs. Each of the licenses grants the partners rights to use our intellectual property as it exists and is identified on the effective date of the license, because there is no ongoing development of the ENHANZE technology required. Therefore, we recognize revenue from licenses at the point when the license becomes effective and the partner has received access to our intellectual property, usually at the inception of the agreement.
When partners can select additional targets to add to the licenses granted, we consider these rights to be options. We evaluate whether such options contain material rights, i.e. have exercise prices that are discounted compared to what we would charge for a similar license to a new partner. The exercise price of these options includes a combination of the target selection fees, event-based milestone payments and royalties. When these amounts in aggregate are not offered at a discount that exceeds discounts available to other customers, we conclude the option does not contain a material right, and we consider grants of additional licensing rights upon option exercises to be separate contracts (target selection contracts).
Generally, we provide indemnification and protection of licensed intellectual property for our customers. These provisions are part of assurance that the licenses meet the agreements’ representations and are not obligations to provide goods or services.
We also fulfill purchase orders for supply of bulk rHuPH20 and perform research and development services pursuant to projects authorization forms for our partners, which represent separate contracts. In addition to our licenses, we price our supply of bulk rHuPH20 and research and development services at our regular selling prices, called standalone selling prices (“SSP”). Therefore, our partners do not have material rights to order these items at prices not reflective of SSP. Refer to the discussion below regarding recognition of revenue for these separate contracts.
Transaction price for a contract represents the amount to which we are entitled in exchange for providing goods and services to the customer. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. Apart from the upfront license payment (or target selection fees in the target selection contracts), all other fees we may earn under our collaborative agreements are subject to significant uncertainties of product development. Achievement of many of the event-based development and regulatory milestones may not be probable until such milestones are actually achieved. This generally relates to milestones such as obtaining marketing authorization approvals. With respect to other development milestones, e.g., dosing of a first patient in a clinical trial, achievement could be considered probable prior to its actual occurrence, based on the progress towards commencement of the trial. In order to evaluate progress towards commencement of a trial, we assess the status of activities
leading up to our partner’s initiation of a trial such as feedback received from the applicable regulatory authorities, completion of Investigational New Drug (“IND”) or equivalent filings, readiness and availability of drug, readiness of study sites and our partner’s commitment of resources to the program. We do not include any amounts subject to uncertainties in the transaction price until it is probable that the amount will not result in a significant reversal of revenue in the future. At the end of each reporting period, we re-evaluate the probability of achievement of such milestones and any related constraint, and if necessary, adjust our estimate of the overall transaction price.
When target exchange rights are held by partners, and the amounts attributed to these rights are not refundable, they are included in the transaction price. However, they are recorded as deferred revenues because we have a potential performance obligation to provide a new target upon an exchange right being exercised. These amounts are recognized in revenue when the right of exchange expires or is exercised.
Because our agreements have one type of performance obligation (licenses) which are typically all transferred at the same time at agreement inception, allocation of transaction price often is not required. However, allocation is required when licenses for some of the individual targets are subject to rights of exchange, because revenue associated with these targets cannot be recognized. When allocation is needed, we perform an allocation of the upfront amount based on relative SSP of licenses for individual targets. We determine license SSP using an income-based valuation approach utilizing risk-adjusted discounted cash flow projections of the estimated return a licensor would receive. When amounts subject to uncertainties, such as milestones and royalties, are included in the transaction price, we attribute them to the specific individual target licenses which generate such milestone or royalty amounts.
We also estimate SSP of bulk rHuPH20 and research and development services, to determine that our partners do not have material rights to order them at discounted prices. For supplies of bulk rHuPH20, because we effectively act as a contract manufacturer to our partners, we estimate and charge SSP based on the typical contract manufacturer margins consistent with all of our partners. We determine SSP of research and development services based on a fully-burdened labor rate. Our rates are comparable to those we observe in other collaborative agreements. We also have a history of charging similar rates to all of our partners.
Upfront amounts allocated to licenses to individual targets are recognized as revenue when the license is transferred to the partner, as discussed above, if the license is not subject to exchange rights, or when the exchange right expires or is exercised. Development milestones and other fees are recognized in revenue when they are included in the transaction price, because by that time, we have already transferred the related license to the partner.
In contracts to provide research and development services, such services represent the only performance obligation. The fees are charged based on hours worked by our employees and the fixed contractual rate per hour, plus third-party pass-through costs, on a monthly basis. We recognize revenues as the related services are performed based on the amounts billed, as the partner consumes the benefit of research and development work simultaneously as we perform these services, and the amounts billed reflect the value of these services to the customer.
Device License, Development and Supply Arrangements
We have several license, development and supply arrangements with pharmaceutical partners, under which we grant a license to our device technology and provide research and development services that often involve multiple performance obligations and highly-customized deliverables. For such arrangements, we identify each of the promised goods and services within the contract and the distinct performance obligations at inception of the contract and allocate consideration to each performance obligation based on relative SSP, which is generally determined based on the expected cost plus mark-up.
If the contract includes an enforceable right to payment for performance completed to date and performance obligations are satisfied over time, we recognize revenue over the development period using either the input or output method depending on which is most appropriate given the nature of the distinct deliverable. For other contracts that do not contain an enforceable right to payment for performance completed to date, revenue is recognized when control of the product is transferred to the customer. Factors that may indicate transfer of control has occurred include the transfer of legal title, transfer of physical possession, the customer has obtained the significant risks and rewards of ownership of the assets, and we have a present right to payment.
Our typical payment terms for development contracts may include an upfront payment equal to a percentage of the total contract value with the remaining portion to be billed upon completion and transfer of the individual deliverables or satisfaction of the individual performance obligations. We record a contract liability for cash received in advance of performance, which is presented within deferred revenue and deferred revenue, long-term in our consolidated balance sheets and recognized as revenue in our consolidated statements of income when the associated performance obligations have been satisfied.
License fees and milestones received in exchange for the grant of a license to our functional intellectual property, such as patented technology and know-how in connection with a partnered development arrangement, are generally recognized at
inception of the arrangement, or over the development period depending on the facts and circumstances, as the license is generally not distinct from the non-licensed goods or services to be provided under the contract. Milestone payments that are contingent upon the occurrence of future events are evaluated and recorded at the most likely amount, and to the extent that it is probable that a significant reversal of revenue will not occur when the associated uncertainty is resolved.
Refer to Note 5, Revenue, for further discussion on our collaborative arrangements.
Product Sales, Net
Proprietary Product Sales
Our commercial portfolio of proprietary products includes XYOSTED and Hylenex recombinant which we sell primarily to wholesale pharmaceutical distributors and specialty pharmacies, who sell the products to hospitals, retail chain drug stores and other end-user customers. Sales to wholesalers are made pursuant to purchase orders subject to the terms of a master agreement, and delivery of individual packages of products represents performance obligations under each purchase order. We use contract manufacturers to produce our proprietary products and third-party logistics (“3PL”) vendors to process and fulfill orders. We concluded we are the principal in the sales to wholesalers because we control access to services rendered by both vendors and direct their activities. We have no significant obligations to wholesalers to generate pull-through sales.
Revenue is recognized when control has transferred to the customer, which is typically upon delivery, at the net selling price, which reflects the variable consideration for which reserves and sales allowances are established for estimated returns, wholesale distribution fees, prompt payment discounts, government rebates and chargebacks, plan rebate arrangements and patient discount and support programs. We recognize revenue from product sales and related cost of sales upon product delivery to the wholesaler location. At that time, the wholesalers take control of the product as they take title, bear the risk of loss of ownership, and have an enforceable obligation to pay us. They also have the ability to direct sales of product to their customers on terms and at prices they negotiate. Although wholesalers have product return rights, we do not believe they have a significant incentive to return the product to us.
The determination of certain reserves and sales allowances requires us to make a number of judgements and estimates to reflect our best estimate of the transaction price and the amount of consideration to which we believe we would be ultimately entitled to receive. The expected value is determined based on unit sales data, contractual terms with customers and third-party payers, historical and estimated future percentage of rebates incurred on sales, historical and future insurance plan billings, any new or anticipated changes in programs or regulations that would impact the amount of the actual rebates, customer purchasing patterns, product expiration dates and levels of inventory in the distribution channel. The estimated amounts of credit for product returns, chargebacks, distribution fees, prompt payment discounts, rebates and customer co-pay support programs are included in accrued expenses and accounts receivable, net in our consolidated balance sheets upon recognition of revenue from product sales. We monitor actual product returns, chargebacks, discounts and fees subsequent to the sale. If these amounts differ from our estimates, we make adjustments to these allowances, which are applied to increase or reduce product sales revenue and earnings in the period of adjustment.
Selling prices initially billed to wholesalers are subject to discounts for prompt payment and subsequent chargebacks when wholesalers sell our products at negotiated discounted prices to members of certain group purchasing organizations (“GPOs”), Pharmacy Benefit Managers (“PBMs”) and government programs. We also pay quarterly distribution fees to certain wholesalers for inventory reporting and chargeback processing, and to PBMs and GPOs as administrative fees for services and for access to their members. We concluded the benefits received in exchange for these fees are not distinct from our sales of our products, and accordingly we apply these amounts to reduce revenues. Wholesalers also have rights to return unsold product nearing or past the expiration date. Because of the shelf life of our products and our lengthy return period, there may be a significant period of time between when the product is shipped and when we issue credits on returned product.
We estimate the transaction price when we receive each purchase order taking into account the expected reductions of the selling price initially billed to the wholesaler arising from all of the above factors. We have compiled historical experience and data to estimate future returns and chargebacks of our products and the impact of the other discounts and fees we pay. When estimating these adjustments to the transaction price, we reduce it sufficiently to be able to assert that it is probable that there will be no significant reversal of revenue when the ultimate adjustment amounts are known.
Each purchase order contains only one type of product, and is usually shipped to the wholesaler in a single shipment. Therefore, allocation of the transaction price to individual packages is not required.
In connection with the orders placed by wholesalers, we incur costs such as commissions to our sales representatives. However, as revenue from product sales is recognized upon delivery to the wholesaler, which occurs shortly after we receive a purchase order, we do not capitalize these commissions and other costs, based on application of the practical expedient allowed within the applicable guidance.
Partnered Product Sales
Bulk rHuPH20
We sell bulk rHuPH20 to partners for use in research and development and, subsequent to receiving marketing approval, we sell it for use in collaboration commercial products. Sales are made pursuant to purchase orders subject to the terms of the collaborative agreement or a supply agreement, and delivery of units of bulk rHuPH20 represent performance obligations under each purchase order. We provide a standard warranty that the product conforms to specifications. We use contract manufacturers to produce bulk rHuPH20 and have concluded we are the principal in the sales to partners. The transaction price for each purchase order of bulk rHuPH20 is fixed based on the cost of production plus a contractual markup, and is not subject to adjustments. Allocation of the transaction price to individual quantities of the product is usually not required because each order contains only one type of product.
We recognize revenue from the sale of bulk rHuPH20 as product sales and related cost of sales upon transfer of title to our partners. At that time, the partners take control of the product, bear the risk of loss of ownership, and have an enforceable obligation to pay us.
Devices
We are party to several license, development, supply and distribution arrangements with pharmaceutical partners, under which we produce and are the exclusive supplier of certain products, devices and/or components. Revenue is recognized when or as control of the goods transfers to the customer as discussed below.
We are the exclusive supplier of OTREXUP® to Otter. Because this product is custom manufactured with no alternative use and we have a contractual right to payment for performance completed to date, control is continuously transferred to the customer as the product is produced pursuant to firm purchase orders. Revenue is recognized over time using the output method based on the contractual selling price and number of units produced. The amount of revenue recognized in excess of the amount shipped/billed to the customer, if any, is recorded as contract assets in our consolidated balance sheets due to the short-term nature in which the amount is ultimately expected to be billed and collected from the customer.
All other device partnered product sales are recognized at the point in time in which control is transferred to the customer, which is typically upon shipment. Sales terms and pricing are governed by the respective supply and distribution agreements, and there is generally no right of return. Revenue is recognized at the transaction price, which includes the contractual per unit selling price and estimated variable consideration, such as volume-based pricing arrangements or profit-sharing arrangements, if any. We recognize revenue, including the estimated variable consideration we expect to receive for contract margin on future commercial sales, upon shipment of the goods to our partner. The estimated variable consideration is recognized at an amount we believe is not subject to significant reversal of revenue based on historical experience and is adjusted at each reporting period if the most likely amount of expected consideration changes or becomes fixed.
Revenue Presentation
In our consolidated statements of income, we report the upfront payments, event-based development and regulatory milestones and sales milestones as revenues under collaborative agreements. We also include in this category revenues from separate research and development contracts pursuant to project authorization forms. We report royalties received from partners as a separate line in our consolidated statements of income.
Revenues from sales of our proprietary and partnered products are included in product sales, net in our consolidated statements of income.
In the footnotes to our consolidated financial statements, we provide disaggregated revenue information by type of arrangement (royalties; product sales, net; and collaborative agreements), and additionally, by type of payment stream received under collaborative agreements (upfront license and target nomination fees; event-based development and regulatory milestones and other fees; sales-based milestones; and device licensing and development revenue).
Cost of Sales
Cost of sales consists primarily of raw materials, third-party manufacturing costs, fill and finish costs, freight costs, internal costs and manufacturing overhead associated with the production of proprietary and partnered products. Cost of sales also consists of the write-down of excess, dated and obsolete inventories and the write-off of inventories that do not meet certain product specifications, if any.
Research and Development Expenses
Research and development expenses include salaries and benefits, allocation of facilities and other overhead expenses, research related manufacturing services, contract services, and other outside expenses related to manufacturing, preclinical and regulatory activities and our partner development platforms. Research and development expenses are charged to operating expenses as incurred when these expenditures relate to our research and development efforts and have no alternative future uses. 
We are obligated to make upfront payments upon execution of certain research and development agreements. Advance payments, including nonrefundable amounts, for goods or services that will be used or rendered for future research and development activities are deferred. Such amounts are recognized as expense as the related goods are delivered or the related services are performed or such time when we do not expect the goods to be delivered or services to be performed.
Share-Based Compensation
We record compensation expense associated with stock options, restricted stock units (“RSUs”), performance stock units (“PSUs”) and shares issued under our employee stock purchase plan (“ESPP”) in accordance with the authoritative guidance for share-based compensation. The cost of employee services received in exchange for an award of an equity instrument is measured at the grant date, based on the estimated fair value of the award, and is recognized as expense on a straight-line basis over the requisite service period of the award. Share-based compensation expense for an award with a performance condition is recognized when the achievement of such performance condition is determined to be probable. If the outcome of such performance condition is not determined to be probable or is not met, no compensation expense is recognized and any previously recognized compensation expense is reversed. Forfeitures are recognized as a reduction of share-based compensation expense as they occur.
Income Taxes
We provide for income taxes using the liability method. Under this method, deferred income tax assets and liabilities are determined based on the differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at each reporting period. We measure deferred tax assets and liabilities using enacted tax rates for the year in which the differences are expected to reverse. Significant judgment is required by management to determine our provision for income taxes, our deferred tax assets and liabilities, and any associated valuation allowances recorded against our net deferred tax assets, which are based on complex and evolving tax regulations. Deferred tax assets (“DTA”) and other tax benefits are recorded when they are more likely than not to be realized. On a quarterly basis, we assess the need for valuation allowance on our DTAs, weighing all positive and negative evidence, to assess if it is more-likely-than-not that some or all of our DTAs will be realized.
Segment Information
We operate our business in one operating segment, which includes all activities related to the research, development and commercialization of our proprietary enzymes and devices. This segment also includes revenues and expenses related to (i) research and development and manufacturing activities conducted under our collaborative agreements with third parties, and (ii) product sales of proprietary and partnered products. The chief operating decision-maker (“CODM”), our Chief Executive Officer (“CEO”), reviews the operating results on an aggregate basis and manages the operations as a single operating segment.
Adoption and Pending Adoption of Recent Accounting Pronouncements
The following table provides a brief description of recently issued accounting standards, those adopted in the current period and those not yet adopted:
StandardDescriptionEffective Date
Adoption Method
Effect on the Financial
Statements or Other Significant Matters
In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.
The new standard is intended to improve annual and interim reportable segment disclosure requirements regardless of number of reporting units, primarily through enhanced disclosures of significant expenses. The amendment requires public entities to disclose significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit and loss.
Annual periods beginning after December 15, 2023 (our 2024 Form 10-K), and interim periods within fiscal years beginning after December 15, 2024 (our Q1 2025 Form 10-Q) - Early adoption is permitted, including adoption in an interim period

Retrospective
We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures.
The new guidance includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction.
Annual periods beginning after December 15, 2024 (our 2025 Form 10-K) - Early adoption is permitted
Prospective or Retrospective
We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.
v3.24.0.1
Business Combination
12 Months Ended
Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]  
Business Combination Business Combination
On May 24, 2022, we acquired all outstanding equity interests of Antares Pharma, Inc. (“Antares”) according to the terms and conditions of the Agreement and Plan of Merger, dated as of April 12, 2022 (the “Merger Agreement”). Antares is a specialty pharmaceutical company focused primarily on the development and commercialization of pharmaceutical products and technologies that address patient needs in targeted therapeutic areas. We acquired Antares as a part of our strategy to expand as a drug delivery company and include specialty products.
The total purchase consideration of Antares was $1,045.7 million. Each share of Antares common stock issued and outstanding was converted into the right to receive $5.60 in cash without interest, less any applicable withholding taxes (“Merger Consideration”). Additionally, in connection with the transaction, each Antares equity award granted and outstanding as of May 24, 2022 under the Antares’ equity compensation plans was converted into the right to receive Merger Consideration. Other components of purchase consideration include cash paid at closing to settle Antares’ existing debt of $19.7 million and seller transaction costs paid by us on behalf of Antares of $22.9 million.
The acquisition of Antares was funded by cash on hand and borrowings under the new credit agreement with Bank of America, N.A. (“BofA”) and other lenders that provides for (i) a $350 million revolving credit facility (the “Revolving Credit Facility”) and (ii) a $250 million term loan facility (the “Term Facility”, collectively with the Revolving Credit Facility, the “2022 Facility”) as described in Note 8, Long-term Debt, Net. We recognized transaction costs of $21.9 million in the twelve months ended December 31, 2022. These costs are reported in selling, general and administrative expenses in our consolidated statements of income. Transaction costs include, but are not limited to, investment banker, advisory, legal, and other professional fees.
Purchase Consideration
The total purchase consideration was comprised of the following (in thousands):

Cash consideration for Antares shares outstanding as of May 24, 2022$956,886 
Consideration for Antares equity compensation awards (a)
45,828 
Consideration for seller transaction costs paid by Halozyme22,906 
Consideration related to Antares closing indebtedness settled by Halozyme19,683 
Cash consideration related to cash bonus awards paid by Halozyme
365 
Total purchase consideration
$1,045,668 
(a) Consideration for Antares equity compensation awards consists of $32.2 million paid for vested equity awards as well as $13.6 million paid for the pre-combination portion of unvested equity awards that were accelerated as part of the Merger Agreement. The fair value of the unvested equity awards attributable to the post-combination period of $8.7 million is included in our consolidated statements of income during the year ended December 31, 2022.
Fair Value of Assets Acquired and Liabilities Assumed
The acquisition of Antares has been accounted for using the acquisition method of accounting in accordance with authoritative guidance for business combinations, with Halozyme treated as the accounting acquirer, which requires, among other things, that the assets acquired and liabilities assumed be recognized at their fair value on the acquisition date.
The table below presents the estimated fair values of assets acquired and liabilities assumed on the acquisition date based on valuations and management estimates (in thousands). Fair value estimates are based on a complex series of judgments about future events and uncertainties and rely heavily on estimates and assumptions. The judgments used to determine the estimated fair value assigned to each class of assets acquired and liabilities assumed, as well as asset lives, can materially impact our results of operations.
Amounts recognized as of 12/31/2022
Measurement period adjustment
Amounts recognized as of 12/31/2023 (as adjusted )
Total purchase consideration, net of $46,548 cash acquired
$999,120 $— $999,120 
Assets
Short-term investments498 — 498 
Accounts receivable, net82,160 (200)81,960 
Inventories, net28,068 — 28,068 
Prepaid expenses and other assets5,241 — 5,241 
Property and equipment, net28,661 — 28,661 
Intangibles, net589,800 — 589,800 
Liabilities
Accounts Payable7,197 — 7,197 
Accrued expenses41,654 2,038 43,692 
Deferred revenue, current portion2,509 — 2,509 
Deferred revenue, net of current portion1,207 — 1,207 
Deferred tax liabilities, net71,002 5,534 76,536 
Other long-term liabilities20,788 — 20,788 
Net assets acquired, excluding goodwill590,071 (7,772)582,299 
Goodwill$409,049 $7,772 $416,821 
Goodwill is the excess of the consideration transferred over the net assets recognized and represents the expected revenue and cost synergies of the combined company and assembled workforce. Goodwill was allocated entirely to the single reportable unit. Goodwill recognized as a result of the acquisition is not deductible for tax purposes.
In the first six months of 2023, we recorded measurement period adjustments to increase accrued expenses by $2.0 million, increase deferred tax liabilities by $5.5 million and reduce accounts receivable by $0.2 million. The measurement period adjustments were recorded to reflect facts and circumstances that existed as of the acquisition date. During the second quarter of 2023, we finalized the estimates impacting the allocation of the purchase price consideration.
Identifiable Intangible Assets
The estimated fair values of identifiable intangible assets were prepared using the excess earnings method which calculates the present value of the incremental after-tax cash flows attributable solely to each intangible asset. The estimated useful lives are based on forecasted periods of benefit for each intangible asset which consider commercialization dates, the estimated revenue cycle based on the products’ competitiveness in the market, and the loss of exclusivity timing with subsequent trending down of revenue. For the ATRS-1902 IPR&D, the useful life is considered indefinite as the asset has not been placed into service. As such, the ATRS-1902 IPR&D will be tested annually for impairment and will not be amortized. Useful lives and final values are presented in the table below.
Amount (in thousands)Useful life (years)
Auto-Injector technology platform$402,000 7
XYOSTED proprietary product136,200 10
TLANDO product rights2,900 10
ATRS-1902 (IPR&D)48,700 Indefinite
Fair value of intangible assets acquired$589,800 
Unaudited Pro Forma Results
Our prior year consolidated financial statements include Antares’ results of operations from the date of acquisition on May 24, 2022 through December 31, 2022. Total revenues and net loss after taxes attributable to Antares during this period and included in our consolidated financial statements for the twelve months ended December 31, 2022 total $112.7 million and $67.6 million, respectively.
The following unaudited pro forma financial information summarizes combined results of operations of Halozyme and Antares as if the companies had been combined as of the beginning of our fiscal year 2021 (in thousands).
Twelve Months Ended December 31,
20222021
Total revenues
$712,683 $627,292 
Net income218,723 295,634 
The unaudited pro forma financial information for all periods presented includes the business combination accounting effects resulting from this acquisition. The unaudited pro forma results include adjustments to reflect the amortization of the inventory step-up and the incremental intangible asset amortization to be incurred based on preliminary valuations of assets as well as certain material non-recurring transaction adjustments related to the acquisition. Adjustments to interest expense, financing costs and investment income were made to reflect the capital structure of the combined entity. Adjustments to income tax expense also were made to reflect the anticipated effective tax rate of the combined entity. The unaudited pro forma financial information as presented is for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of fiscal year 2021, nor is it necessarily an indication of trends in future results for a number of reasons, including, but not limited to, differences between the assumptions used to prepare the pro forma information, cost savings from operating efficiencies, potential synergies, and the impact of incremental costs incurred in integrating the businesses.
v3.24.0.1
Fair Value Measurement
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Fair Value Measurement Fair Value Measurement
Available-for-sale marketable securities consisted of the following (in thousands):
December 31, 2023
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Asset-backed securities$3,512 $— $(8)$3,504 
Corporate debt securities6,022 (10)6,013 
U.S. treasury securities
175,996 200 (12)176,184 
Agency bonds16,119 — (16)16,103 
Commercial paper15,826 — — 15,826 
Total marketable securities, available-for-sale$217,475 $201 $(46)$217,630 
December 31, 2022
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Asset-backed securities$1,146 $— $— $1,146 
Corporate debt securities7,139 — (9)7,130 
U.S. treasury securities
111,469 — (934)110,535 
Agency bonds2,783 (1)2,784 
Commercial paper7,004 — — 7,004 
Total marketable securities, available-for-sale$129,541 $$(944)$128,599 
As of December 31, 2023, 20 available-for-sale marketable securities with a fair market value of $29.1 million were in a gross unrealized loss position of $46.3 thousand. Based on our review of these marketable securities, we believe none of the unrealized loss is as a result of a credit loss as of December 31, 2023 because we do not intend to sell these securities and it is not more-likely-than-not that we will be required to sell these securities before the recovery of their amortized cost basis.
The estimated fair value of our contractual maturities of available-for-sale debt securities were as follows (in thousands):
December 31, 2023December 31, 2022
Due within one year$197,633 $114,353 
Due after one year but within five years
19,997 14,246 
Total estimated fair value of contractual maturities, available-for-sale$217,630 $128,599 
The following table summarizes, by major security type, our cash equivalents and available-for-sale marketable securities measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):
December 31, 2023December 31, 2022
Level 1Level 2Total estimated fair valueLevel 1Level 2Total estimated fair value
Assets
Cash equivalents
Money market funds$22,142 $— $22,142 $191,704 $— $191,704 
U.S. treasury securities
2,000 — 2,000 — — — 
Corporate debt securities— — — — — — 
Available-for-sale marketable
securities
Asset-backed securities— 3,504 3,504 — 1,146 1,146 
Corporate debt securities— 6,013 6,013 — 7,130 7,130 
U.S. treasury securities
176,184 — 176,184 110,535 — 110,535 
Agency bonds16,103 — 16,103 2,784 2,784 
Commercial paper— 15,826 15,826 — 7,004 7,004 
Total assets$216,429 $25,343 $241,772 $305,023 $15,280 $320,303 
Liabilities
Derivative instruments
Currency hedging contracts(1)
$— $9,480 $— $— $— $— 
(1) Based on observable market transactions of spot currency rates, forward currency rates or equivalently-termed instruments. Carrying amounts of the financial assets and liabilities are equal to the fair value. As of December 31, 2023, the derivative liabilities recorded within accrued expenses and other long-term liabilities were $2.9 million and $6.6 million, respectively.
We had no available for sale securities that were classified within Level 3 as of December 31, 2023 and 2022.
A contingent liability was assumed as part of the Antares acquisition related to TLANDO. The acquisition date fair value was measured using the income approach, specifically the probability weighted expected return method for the development milestone payments and the option pricing methodology using the Monte Carlo simulation for commercial milestone payments and royalty payments. Estimates and assumptions used in the Monte Carlo simulation include forecasted revenues, cost of debt, risk free rate, weighted average cost of capital, revenue market price risk and revenue volatility. Estimates and assumptions used in the income approach include the probability of achieving certain milestones and a discount rate. These unobservable inputs represent a Level 3 measurement because they are supported by little or no market activity and reflect our own assumptions in measuring fair value. Changes in the fair value subsequent to the acquisition date is recognized in our consolidated statements of income. In September 2023, we provided Lipocine notice of termination of the TLANDO license agreement effective January 31, 2024. Based on the fair value remeasurement performed, we recognized a gain on change in fair value of the contingent liability of $13.2 million for the twelve months ended December 31, 2023 in our consolidated statements of income.
v3.24.0.1
Revenue
12 Months Ended
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
Our disaggregated revenues were as follows (in thousands):
Year Ended December 31,
202320222021
Royalties$447,865 $360,475 $203,900 
Product sales, net
Sales of bulk rHuPH20
115,442 82,084 80,960 
Sale of proprietary products130,834 72,849 23,264 
Sale of device partnered products
54,578 36,097 — 
Total product sales, net300,854 191,030 104,224 
Revenues under collaborative agreements:
Upfront license and target nomination fees
2,000 30,000 42,000 
Event-based development and regulatory milestones and other fees
69,000 59,000 42,000 
Sales-based milestones
— 10,000 50,000 
Device licensing and development revenue
9,534 9,611 1,186 
Total revenues under collaborative agreements80,534 108,611 135,186 
Total revenues
$829,253 $660,116 $443,310 
During the year ended December 31, 2023 we recognized revenue related to licenses granted to partners in prior periods in the amount of $516.9 million. This amount represents royalties earned in the current period, in addition to $69.0 million of variable consideration in the contracts where uncertainties were resolved and the development milestones are expected to be achieved or were achieved. We also recognized revenue of $3.2 million during the year ended December 31, 2023 that had been included in deferred revenues in our consolidated balance sheets as of December 31, 2022.
Accounts receivable, other contract assets and deferred revenues (contract liabilities) from contracts with customers, including partners, consisted of the following (in thousands):
December 31, 2023December 31, 2022
Accounts receivable, net$233,254 $186,970 
Other contract assets956 44,102 
Deferred revenues4,048 — 
As of December 31, 2023, the amounts included in the transaction price of our contracts with customers, including partners, and allocated to goods and services not yet provided were $80.8 million of which $76.8 million relates to unfulfilled product purchase orders and $4.0 million has been collected and is reported as deferred revenues in our Consolidated Balance Sheets. The unfulfilled product purchase orders are estimated to be delivered by the end of 2024. Of the total deferred revenues of $4.0 million, $0.6 million is expected to be used by our customers within the next 12 months.
We recognized contract assets of $1.0 million as of December 31, 2023, which related to development milestones deemed probable of receipt for intellectual property licenses granted to partners in prior periods and for goods or services when control has transferred to the customer, and corresponding revenue is recognized on an over time basis but is not yet billable to the customer in accordance with the terms of the contract.
v3.24.0.1
Certain Balance Sheet Items
12 Months Ended
Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]  
Certain Balance Sheet Items Certain Balance Sheet Items
Accounts receivable, net and contract assets consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Accounts receivable from product sales to partners$58,588 $62,979 
Accounts receivable from revenues under collaborative agreements16,183 18,776 
Accounts receivable from royalty payments118,170 100,900 
Accounts receivable from other product sales47,060 6,229 
Contract assets956 44,102 
Total accounts receivable and contract assets
240,957 232,986 
Allowance for distribution fees and discounts(6,747)(1,914)
Total accounts receivable, net and contract assets
$234,210 $231,072 
Inventories consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Raw materials$23,646 $13,792 
Work-in-process34,025 40,361 
Finished goods69,930 45,970 
Total inventories, net
$127,601 $100,123 
Prepaid expenses and other assets consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Prepaid manufacturing expenses$36,850 $51,694 
Other prepaid expenses12,902 4,647 
Other assets16,677 14,984 
Total prepaid expenses and other assets
66,429 71,325 
Less: Long-term portion
(17,816)(26,301)
Total prepaid expenses and other assets, current
$48,613 $45,024 
Prepaid manufacturing expenses include raw materials, slot reservation fees and other amounts paid to contract manufacturing organizations. Such amounts are reclassified to work-in-process inventory as materials are used or the contract manufacturing organization services are complete.
Property and equipment, net consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Research equipment$8,588 $7,380 
Manufacturing equipment32,472 27,893 
Computer and office equipment9,722 7,855 
Leasehold improvements6,987 6,729 
Subtotal
57,769 49,857 
Accumulated depreciation and amortization(19,661)(14,756)
Subtotal38,108 35,101 
Right of use of assets36,836 40,469 
Property and equipment, net
$74,944 $75,570 
Depreciation and amortization expense was approximately $11.1 million, $6.5 million, and $3.0 million, inclusive of ROU asset amortization of $5.5 million, $3.0 million and $1.6 million for the years ended December 31, 2023, 2022 and 2021, respectively.
Accrued expenses consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Accrued compensation and payroll taxes$17,361 $19,939 
Accrued outsourced manufacturing expenses12,361 12,190 
Income taxes payable963 — 
Product returns and sales allowance41,932 30,261 
Other accrued expenses33,584 35,270 
Lease liability32,197 34,788 
Total accrued expenses
138,398 132,448 
Less long-term portion(37,720)(32,686)
Total accrued expenses, current
$100,678 $99,762 
Expense associated with the accretion of the lease liabilities was approximately $2.5 million, $0.5 million and $0.3 million for the twelve months ended December 31, 2023, 2022 and 2021, respectively. Total lease expense for the twelve months ended December 31, 2023, 2022 and 2021 was $8.0 million, $3.3 million and $1.9 million, respectively.
Cash paid for amounts related to leases for the twelve months ended December 31, 2023, 2022 and 2021 was $6.7 million, $4.2 million and $2.7 million, respectively.
v3.24.0.1
Goodwill and Intangible Assets
12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Goodwill and Intangible Assets
Goodwill
A summary of the activity impacting goodwill is presented below (in thousands):
Balance as of December 31, 2022
$409,049 
Measurement period adjustments (1)
7,772 
Balance as of December 31, 2023
$416,821 
(1) Refer to Note 3, Business Combination, for further discussion on the measurement period adjustments.
Intangible Assets
Our acquired intangible assets are amortized using the straight-line method over their estimated useful lives of seven to ten years. The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of December 31, 2023 (in thousands).
Weighted average useful life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto-Injector technology platform7$402,000 $92,163 $309,837 
XYOSTED proprietary product10136,200 21,858 114,342 
Total finite-lived intangibles, net (1)
$538,200 $114,021 $424,179 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net
$472,879 
(1) An impairment charge of $2.5 million was recognized during the year ended December 31, 2023 resulting in the full impairment of the TLANDO product rights intangible asset. The impairment charge resulted from the notice of termination of the TLANDO license agreement provided to Lipocine in September 2023, effective January 31, 2024, and is included in amortization of intangibles in our consolidated statements of income.
Estimated future annual amortization of finite-lived intangible assets is shown in the following table (in thousands). Actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors.
Year
Amortization Expense
2024$71,049 
202571,049 
202671,049 
202771,049 
202871,049 
Thereafter68,934 
Total$424,179 
v3.24.0.1
Long-Term Debt, Net
12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Long-Term Debt, Net Long-Term Debt, Net
1.00% Convertible Notes due 2028
In August 2022, we completed the sale of $720.0 million in aggregate principal amount of 1.00% Convertible Senior Notes due 2028 (the “2028 Convertible Notes” and collectively with the 2024 Convertible Notes and 2027 Convertible Notes the “Convertible Notes”). The net proceeds in connection with the issuance of the 2028 Convertible Notes, after deducting the initial purchasers’ fee of $18.0 million, was approximately $702.0 million. We also incurred additional debt issuance costs totaling $1.0 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.
The 2028 Convertible Notes pay interest semi-annually in arrears on February 15th and August 15th of each year at an annual rate of 1.00%. The 2028 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2028 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2028 Convertible Notes have a maturity date of August 15, 2028.
Holders may convert their 2028 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on December 31, 2022, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2028 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, February 15, 2028 until the close of business on the second scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2028 Convertible Notes were not convertible.
Upon conversion, we will pay cash for the settlement of principal, and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2028 Convertible Notes is 17.8517 shares of common stock per $1,000 in principal amount of 2028 Convertible Notes, equivalent to a conversion price of approximately $56.02 per share of our common stock. The conversion rate is subject to adjustment in some events but will not be adjusted for any accrued or unpaid interest.
As of December 31, 2023, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.
Capped Call Transactions
In connection with the offering of the 2028 Convertible Notes, we entered into capped call transactions with certain counterparties (the “Capped Call Transactions”). The Capped Call Transactions are expected generally to reduce potential dilution to holders of our common stock upon conversion of the 2028 Convertible Notes or at our election (subject to certain conditions) offset any cash payments we are required to make in excess of the principal amount of such converted 2028 Convertible Notes. The cap price of the Capped Call Transactions is initially $75.4075 per share of common stock, representing a premium of 75% above the last reported sale price of $43.09 per share of common stock on August 15, 2022, and is subject to certain adjustments under the terms of the Capped Call Transactions. As of December 31, 2023, no capped calls had been exercised.
Pursuant to their terms, the capped calls qualify for classification within stockholders’ equity in our consolidated balance sheets, and their fair value is not remeasured and adjusted as long as they continue to qualify for stockholders’ equity classification. We paid approximately $69.1 million for the Capped Calls, including applicable transaction costs, which was recorded as a reduction to additional paid-in capital in the consolidated balance sheets. The Capped Call Transactions are separate transactions entered into by us with the capped call Counterparties, are not part of the terms of the Convertible Notes, and do not affect any holder’s rights under the Convertible Notes. Holders of the Convertible Notes do not have any rights with respect to the Capped Call Transactions.
0.25% Convertible Notes due 2027
In March 2021, we completed the sale of $805.0 million in aggregate principal amount of 0.25% Convertible Senior Notes due 2027 (the “2027 Convertible Notes”). The net proceeds in connection with the issuance of the 2027 Convertible Notes,
after deducting the initial purchasers’ fee of $20.1 million, was approximately $784.9 million. We also incurred additional debt issuance costs totaling $0.4 million. Debt issuance costs and the initial purchasers’ fee are presented as a debt discount.
The 2027 Convertible Notes pay interest semi-annually in arrears on March 1st and September 1st of each year at an annual rate of 0.25%. The 2027 Convertible Notes are general unsecured obligations and rank senior in right of payment to all indebtedness that is expressly subordinated in right of payment to the 2027 Convertible Notes, rank equally in right of payment with all existing and future liabilities that are not so subordinated, are effectively junior to any secured indebtedness to the extent of the value of the assets securing such indebtedness and are structurally subordinated to all indebtedness and other liabilities (including trade payables) of our current or future subsidiaries. The 2027 Convertible Notes have a maturity date of March 1, 2027.
Holders may convert their 2027 Convertible Notes at their option only in the following circumstances: (1) during any calendar quarter commencing after the calendar quarter ending on June 30, 2021, if the last reported sale price per share of common stock exceeds 130% of the conversion price for each of at least 20 trading days during the 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding calendar quarter; (2) during the five consecutive business days immediately after any five consecutive trading day period (such five consecutive trading day period, the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price per share of our common stock on such trading day and the conversion rate on such trading day; (3) upon the occurrence of certain corporate events or distributions on our common stock, as described in the offering memorandum for the 2027 Convertible Notes; (4) if we call such notes for redemption; and (5) at any time from, and including, September 1, 2026 until the close of business on the scheduled trading day immediately before the maturity date. As of December 31, 2023, the 2027 Convertible Notes were not convertible.
Upon conversion, we will pay cash for the settlement of principal and for the premium, if applicable, we will pay cash, deliver shares of common stock or a combination of cash and shares of common stock, at our election. The initial conversion rate for the 2027 Convertible Notes is 12.9576 shares of common stock per $1,000 in principal amount of 2027 Convertible Notes, equivalent to a conversion price of approximately $77.17 per share of our common stock. The conversion rate is subject to adjustment.
As of December 31, 2023, we were in compliance with all covenants and there was no material adverse change in our business, operations or financial condition.
1.25% Convertible Notes due 2024
In November 2019, we completed the sale of $460.0 million in aggregate principal amount of 1.25% Convertible Senior Notes due 2024 (the “2024 Convertible Notes”). The net proceeds in connection with the issuance of the 2024 Convertible Notes, after deducting the initial purchasers’ fee of $12.7 million, was approximately $447.3 million. We also incurred debt issuance cost totaling $0.3 million. Debt issuance costs and the initial purchasers’ fee were presented as a debt discount.
In January 2021, we notified the note holders of our irrevocable election to settle the principal of the 2024 Convertible Notes in cash and for the premium, to deliver shares of common stock. The conversion rate for the 2024 Convertible Notes was 41.9208 shares of common stock per $1,000 in principal amount of 2024 Convertible Notes, equivalent to a conversion price of approximately $23.85 per share of our common stock. The conversion rate was subject to adjustment.
In March 2021, we completed a privately negotiated, induced conversion of $369.1 million principal amount of the 2024 Convertible Notes (“2021 Note Repurchases” or the “2021 Induced Conversion”). In connection with the 2021 Induced Conversion, we paid approximately $370.2 million in cash, which included principal and accrued interest, and issued approximately 9.08 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2021 Induced Conversion, we recorded $21.0 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2021. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes.
In August 2022, we completed a privately negotiated induced conversion of $77.4 million principal amount of the 2024 Convertible Notes (“2022 Note Repurchases” or the “2022 Induced Conversion”). In connection with the 2022 Induced Conversion, we paid approximately $77.6 million in cash, which included principal and accrued interest, and issued approximately 1.51 million shares of our common stock representing the intrinsic value based on the contractual conversion rate and incremental shares as an inducement for conversion. As a result of the 2022 Induced Conversion, we recorded $2.7 million in induced conversion expense which was included in other income (expense) of our consolidated statements of income in 2022. The induced conversion expense represented the fair value of the common stock issued upon conversion in excess of the common stock issuable under the original terms of the 2024 Convertible Notes.
In January 2023, we issued a notice for the redemption of 2024 Convertible Notes. Holders of the notes could convert their notes at any time prior to the close of the business day prior to the redemption date. In March 2023, holders of the notes elected to convert the 2024 Convertible Notes in full. In connection with the conversion, we paid approximately $13.5 million in cash which included principal and accrued interest, and issued 288,886 shares of our common stock representing the intrinsic value based on the contractual conversion rate.
Net Carrying Amounts of our Convertible Notes
The carrying amount and fair value of our Convertible Notes were as follows (in thousands).
December 31,
2023
December 31,
2022
Principal amount
2024 Convertible Notes$— $13,483 
2027 Convertible Notes805,000 805,000 
2028 Convertible Notes720,000 720,000 
Total principal amount
$1,525,000 $1,538,483 
Unamortized debt discount
2024 Convertible Notes$— $(149)
2027 Convertible Notes(10,950)(14,359)
2028 Convertible Notes(14,802)(17,875)
Total unamortized debt discount$(25,752)$(32,383)
Carrying amount
2024 Convertible Notes$— $13,334 
2027 Convertible Notes794,050 790,641 
2028 Convertible Notes705,198 702,125 
Total carrying amount$1,499,248 $1,506,100 
Fair value based on trading levels (Level 2)
2024 Convertible Notes$— $32,176 
2027 Convertible Notes695,826 784,770 
2028 Convertible Notes670,522 849,823 
Total fair value of outstanding notes$1,366,348 $1,666,769 
Remaining amortization per period of debt discount (in years)
2024 Convertible Notes— 1.9
2027 Convertible Notes3.24.2
2028 Convertible Notes4.65.6
The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).
Twelve Months Ended December 31,
202320222021
Coupon interest
2024 Convertible Notes$36 $771 $1,906 
2027 Convertible Notes2,013 2,013 1,677 
2028 Convertible Notes7,200 2,660 — 
Total coupon interest
$9,249 $5,444 $3,583 
Amortization of debt discount
2024 Convertible Notes$24 $357 $838 
2027 Convertible Notes3,409 3,386 2,804 
2028 Convertible Notes3,073 1,124 — 
Total amortization of debt discount$6,506 $4,867 $3,642 
Interest expense
2024 Convertible Notes$60 $1,128 $2,744 
2027 Convertible Notes5,422 5,399 4,481 
2028 Convertible Notes10,273 3,784 — 
Total interest expense$15,755 $10,311 $7,225 
Effective interest rates
2024 Convertible Notes— 1.8 %1.8 %
2027 Convertible Notes0.7 %0.7 %0.7 %
2028 Convertible Notes1.5 %1.5 %n/a
Revolving Credit and Term Loan Facilities (May 2022)
In May 2022, in connection with the closing of the Antares acquisition, we entered into a credit agreement, which was subsequently amended, with Bank of America, N.A., as Administrative Agent, Swing Line Lender and an L/C Issuer, and the other lenders and L/C Issuers party thereto (the “2022 Credit Agreement), evidencing a credit facility (the “2022 Facility”) that provides for (i) a $350 million revolving credit facility (the “Revolving Credit Facility”) and (ii) a $250 million term loan facility (the “Term Facility”). Proceeds from a $120 million draw on the Revolving Credit Facility and the $250 million Term Facility were used to fund a portion of the Antares acquisition, repay Antares’ existing debt and pay fees and expenses in connection with the Antares acquisition. The 2022 Credit Agreement contains an expansion feature, which allows us, subject to certain conditions, to increase the aggregate principal amount of the 2022 Facility, provided we remain in compliance with underlying financial covenants on a pro forma basis including the consolidated interest coverage ratio and the consolidated net leverage ratio covenants set forth in the 2022 Credit Agreement. The 2022 Facility will mature on November 30, 2026 unless either the Revolving Credit Facility or the Term Facility is extended prior to such date in accordance with the 2022 Credit Agreement.
The Term Facility requires quarterly scheduled repayments of the term loans in each of the first, second, third and fourth years following the closing in annual amounts equal to 2.50%, 5.00%, 7.50% and 10.00% of the initial principal amount of the term loans, respectively. The term loans are also subject to mandatory prepayments from the proceeds of certain asset sales, subject to our right to reinvest the proceeds thereof.
Borrowings under the 2022 Facility bear interest, at our option, at a rate equal to an applicable margin plus: (a) the applicable Term Secured Overnight Financing Rate (“SOFR”) (which includes a SOFR adjustment of 0.10%), or (b) a base rate determined by reference to the highest of (1) the federal funds effective rate plus 0.50%, (2) the Bank of America prime rate, (3) the Term SOFR rate for an interest period of one month plus 1.10%, and (4) 1.00%. The margin for the 2022 Facility ranges, based on our consolidated total net leverage ratio, from 0.25% to 1.25% in the case of base rate loans and from 1.25% to 2.25% in the case of Term SOFR rate loans. In addition to paying interest on the outstanding principal under the Facility, we will pay (i) a commitment fee in respect of the unutilized commitments thereunder and (ii) customary letter of credit fees and agency fees. The commitment fees range from 0.15% to 0.35% per annum based on our consolidated net leverage ratio.
In August 2022, we entered into Amendment No. 1 to the Credit Agreement (the “Amendment”) among the Company, the Guarantors (as defined in the Credit Agreement), each L/C Issuer from time to time party thereto, Bank of America, N.A., as Administrative Agent (in such capacity, the “Administrative Agent”) and swing line lender (in such capacity, the “Swing Line Lender”), and each lender party thereto, which amends the Credit Agreement dated as of May 24, 2022 (the “Credit Agreement”) among the Company, the Guarantors, the Administrative Agent, the Swing Line Lender, each Lender and the L/C Issuers. The Amendment, among other things, increased the size of the revolving credit facility from $350 million to $575 million. The terms of the Revolving Credit Facility were otherwise unchanged. Concurrently with the entry into the Amendment, we repaid the entire outstanding Term Loan Facility and repaid all outstanding loans under the Revolving Credit Facility under the 2022 Credit Agreement.
As of December 31, 2023, the Revolving Credit Facility was undrawn. We incurred a total of $3.6 million in third-party costs related to the 2022 Credit Agreement which are recorded as debt issuance cost within prepaid expenses and other assets in our consolidated balance sheets. As of December 31, 2023, the unamortized debt issuance cost related to the revolving credit facility was $2.3 million.

Future maturities and interest payments of long-term debt as of December 31, 2023, are as follows (in thousands):
2024$9,213 
20259,213 
20269,213 
2027812,535 
2028724,480 
Thereafter— 
Total minimum payments1,564,654 
Less amount representing coupon interest(39,654)
Gross balance of long-term debt1,525,000 
Less unamortized debt discount(25,752)
Carrying value of long-term debt1,499,248 
Less current portion of long-term debt— 
Long-term debt, less current portion and unamortized debt discount$1,499,248 
v3.24.0.1
Share-based Compensation
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Share-based Compensation Share-based Compensation
We currently grant stock options, RSUs and PSUs under the Amended and Restated 2021 Stock Plan (“2021 Stock Plan”), which was approved by the stockholders on May 5, 2021 and provides for the grant of up to 17.8 million shares of common stock to selected employees, consultants and non-employee members of our Board of Directors as stock options, stock appreciation rights (“SARs”), RSAs, RSUs and PSUs. Awards are subject to terms and conditions established by the Compensation Committee of our Board of Directors. During the year ended December 31, 2023, we granted share-based awards under the 2021 Stock Plan. As of December 31, 2023, $7.8 million shares were subject to outstanding awards and $12.1 million shares were available for future grants of share-based awards.
Total share-based compensation expense related to share-based awards was comprised of the following (in thousands):
Year Ended December 31,
 202320222021
Research and development$13,345 $9,903 $6,992 
Selling, general and administrative23,275 14,494 13,828 
Total share-based compensation expense
$36,620 $24,397 $20,820 
Share-based compensation expense by type of share-based award (in thousands):
Year Ended December 31,
 202320222021
Stock options$16,351 $10,973 $10,252 
RSAs, RSUs, PSUs and ESPP20,269 13,424 10,568 
Total share-based compensation expense
$36,620 $24,397 $20,820 
Total unrecognized estimated compensation cost by type of award and the weighted-average remaining requisite service period over which such expense is expected to be recognized as of December 31, 2023 (in thousands, unless otherwise noted):
December 31, 2023
 Unrecognized
Expense
Remaining
Weighted-Average
Recognition Period
( in years)
Stock options$39,841 2.68
RSUs33,566 2.34
PSUs6,110 1.43
ESPP262 0.45
ESPP. In February 2021, our Board of Directors approved our 2021 ESPP and our stockholders approved the plan in May 2021. The ESPP enables eligible employees to purchase shares of our common stock at the end of each offering period at a price equal to 85% of the fair market value of the shares on the first business day or the last business day of the offering period, whichever is lower. Share purchases are funded through payroll deduction of at least 1% and up to 15% of an employee’s compensation for each payroll period, and no employee may purchase shares under the ESPP that exceeds $25,000 worth of our common stock for a calendar year. As of December 31, 2023, 2,604,222 shares were available for future purchase. The offering period is generally for a six-month period and the first offering period commenced on June 16, 2021. Offering periods shall commence on or about the sixteenth day of June and December of each year and end on or about the fifteenth day of the next December and June respectively, occurring thereafter. During the twelve months ended December 31, 2023, 45,881 shares were issued pursuant to the ESPP.
Stock Options. Options granted under the 2021 Stock Plan must have an exercise price equal to at least 100% of the fair market value of our common stock on the date of grant. The options generally have a maximum contractual term of ten years and vest at the rate of one-fourth of the shares on the first anniversary of the date of grant and 1/48 of the shares monthly thereafter. Certain option awards provide for accelerated vesting if there is a change in control (as defined in the 2021 Stock Plan).
A summary of our stock option award activity as of and for the year ended December 31, 2023 is as follows: 
Shares
Underlying
Stock Options
Weighted
Average Exercise
Price per Share
Weighted
Average
Remaining
Contractual
Term ( in years)
Aggregate
Intrinsic
Value (in millions)
Outstanding as of December 31, 2022
5,368,225 $24.99 
Granted1,979,286 43.93 
Exercised(565,343)17.70 
Canceled/forfeited(359,331)42.33 
Outstanding as of December 31, 2023
6,422,837 30.50 6.64$64.0 
Vested and expected to vest as of December 31, 2023
6,422,837 30.50 6.6464.0 
Exercisable as of December 31, 2023
3,620,251 $21.67 4.96$60.0 
The weighted average grant date fair value of options granted during the years ended December 31, 2023, 2022 and 2021 was $17.72 per share, $14.22 per share and $18.21 per share, respectively. The total intrinsic value of options exercised during the years ended December 31, 2023, 2022 and 2021 was approximately $13.7 million, $21.6 million and $33.5 million, respectively. Cash received from stock option exercises for the years ended December 31, 2023, 2022 and 2021 was approximately $10.0 million, $15.3 million and $16.6 million, respectively.
The exercise price of stock options granted is equal to the closing price of the common stock on the date of grant. The fair value of each option award is estimated on the date of grant using the Black-Scholes-Merton option pricing model (“Black-Scholes Model”). Expected volatility is based on historical volatility of our common stock. The expected term of options granted is based on analyses of historical employee termination rates and option exercises. The risk-free interest rate is based on the U.S. Treasury yield for a period consistent with the expected term of the option in effect at the time of the grant. The dividend yield assumption is based on the expectation of no future dividend payments. The assumptions used in the Black-Scholes Model were as follows:
Year Ended December 31,
 202320222021
Expected volatility
39.68 - 40.82%
39.91 - 50.81%
41.01 - 46.45%
Average expected term (in years)4.84.74.7
Risk-free interest rate
3.37 - 4.72%
1.37 - 4.27%
0.36 - 1.20%
Expected dividend yield— — — 
Restricted Stock Units. A RSU is a promise by us to issue a share of our common stock upon vesting of the unit. RSUs will generally vest at the rate of one-fourth of the shares on each anniversary of the date of grant.
The following table summarizes our RSU activity during the year ended December 31, 2023:
Number of
Shares
Weighted
Average
Grant Date
Fair Value
Weighted
Average
Remaining
Contractual
Term (in years)
Aggregate
Intrinsic
Value (in millions)
Outstanding as of December 31, 2022
1,039,381 $35.76 
Granted646,793 45.16 
Vested(400,309)32.11 
Forfeited(146,529)43.50 
Outstanding as of December 31, 2023
1,139,336 $41.38 1.27$42.1 
The estimated fair value of the RSUs was based on the closing market value of our common stock on the date of grant. The total grant date fair value of RSUs vested during the years ended December 31, 2023, 2022 and 2021 was approximately $12.9 million, $8.6 million and $6.6 million, respectively. The fair value of RSUs vested during the years ended December 31, 2023, 2022 and 2021 was approximately $18.3 million, $11.3 million and $19.0 million, respectively.
Performance Stock Units. A PSU is a promise by us to issue a share of our common stock upon achievement of a specific performance condition.
The following table summarizes our PSU activity during the year ended December 31, 2023:
Number of
Shares
Weighted
Average
Grant Date
Fair Value
Outstanding as of December 31, 2022
142,844 $46.01 
Granted106,174 59.34 
Vested(3,803)49.35 
Forfeited(2,660)52.79 
Outstanding as of December 31, 2023
242,555 $51.72 
The estimated fair value of the PSUs was based on the closing market value of our common stock on the date of grant. The fair value of PSUs vested during the years ended December 31, 2023, 2022 and 2021 was $0.2 million, $0.2 million and $0.1 million, respectively.
v3.24.0.1
Stockholders' Equity
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
During the years ended December 31, 2023, 2022 and 2021, we issued an aggregate of 565,343, 789,870 and 1,179,032 shares of common stock, respectively, in connection with the exercises of stock options, for net proceeds of approximately $10.0 million, $15.3 million and $16.6 million, respectively. For the years ended December 31, 2023, 2022 and 2021, we issued 333,379, 254,907 and 299,958 shares of common stock, respectively, upon vesting of certain RSUs and PSUs for which the RSU holders surrendered 70,733, 68,425 and 94,795 RSUs, respectively, to pay for minimum withholding taxes totaling approximately $7.3 million, $4.4 million and $8.2 million, respectively. Stock options and unvested restricted units totaling approximately 7.8 million, 6.6 million and 5.9 million shares of our common stock were outstanding as of December 31, 2023, 2022 and 2021, respectively.
Share Repurchases
In December 2021, the Board of Directors authorized a second capital return program to repurchase up to $750.0 million of outstanding stock over a three-year period. During 2021, we repurchased 3.9 million shares of common stock for $150.0 million at an average price of $38.51. During 2022, we repurchased 4.5 million shares of common stock for $200.0 million at an average price of $44.44.
We accelerated the initiation of our planned 2024 share repurchases and in November 2023, we entered into an Accelerated Share Repurchase (“ASR”) agreement with Bank of America to accelerate the remaining $250.0 million of share repurchases under the approved capital return program. Pursuant to the agreement, at the inception of the ASR, we paid $250.0 million to Bank of America and took initial delivery of 5.5 million shares. All shares repurchased under our capital return programs have been retired and have resumed their status of authorized and unissued shares. As of December 31, 2023, excluding the shares we received under the ASR, we have repurchased a total of 12.6 million shares for $500.0 million at an average price per share of $39.81 under our $750 million 3-year share repurchase plan.
We had the following activity under the approved share repurchase programs (dollars in thousands, except share and per share data)
2023
Total Number of Shares Purchased
Weighted Average Price Paid Per Share
Total Cost (1)
First quarter4,165,258 $36.01 $150,083 
Second quarter— — — 
Third quarter
— — — 
Fourth quarter— — — 
4,165,258 36.01 $150,083 
Accelerated share repurchase (2)
5,452,563 $— $250,000 

(1)Included in the total cost of shares purchased is a commission fee of $0.02 per share.
(2)Purchased through an ASR agreement executed to repurchase $250.0 million of common stock. In November 2023, we took initial delivery of 5.5 million shares in accordance with the ASR. Final shares will be delivered on or before June 10, 2024.
v3.24.0.1
Earnings per share
12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Earnings per share Earnings per share
Basic earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding during the period, without consideration for common stock equivalents. Outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and the Convertible Notes are considered common stock equivalents and are only included in the calculation of diluted earnings per common share when net income is reported and their effect is dilutive.
Potentially dilutive common shares issuable upon vesting of stock options, RSUs and PSUs are determined using the average share price for each period under the treasury stock method. Potentially dilutive common shares issuable upon conversion of the Convertible Notes are determined using the if-converted method. Since we have committed to settle the principal amount of the Convertible Notes in cash upon conversion only, the number of shares for the conversion spread will be included as a dilutive common stock equivalent.
A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):
Twelve Months Ended December 31,
 202320222021
Numerator
Net income$281,594 $202,129 $402,710 
Denominator
Weighted average common shares outstanding for basic earnings per share
131,927 136,844 140,646 
Dilutive potential common stock outstanding
Stock options
1,824 2,265 2,737 
RSUs, PSUs and ESPP
388 422 555 
Convertible Notes58 1,077 2,858 
Weighted average common shares outstanding for diluted earnings per share
134,197 140,608 146,796 
Earnings per share
Basic$2.13 $1.48 $2.86 
Diluted$2.10 $1.44 $2.74 
Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive, include the following (shares in millions):
Twelve Months Ended December 31,
 202320222021
Anti-dilutive securities (1)
27.8 20.7 13.8 
(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes.
v3.24.0.1
Commitments and Contingencies
12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Operating Leases
Our properties consist of leased office, laboratory, warehouse and assembly facilities. Our administrative offices and research facilities are located in San Diego, California. We also lease a building in Minnetonka, Minnesota consisting of office, assembly operations, and warehousing space, and have a small administrative office in Ewing, New Jersey. We lease an aggregate of approximately 162,000 square feet of space. We pay a pro rata share of operating costs, insurance costs, utilities and real property taxes. Additionally, we lease certain office equipment under operating leases. Total rent expense was approximately $9.3 million, $3.3 million and $2.0 million for the years ended December 31, 2023, 2022 and 2021, respectively.
Approximate annual future minimum operating lease payments as of December 31, 2023 are as follows (in thousands): 
Year
Operating
Leases
2024$6,580 
20256,025 
20265,676 
20275,296 
20285,447 
Thereafter11,686 
Total minimum lease payments40,710 
Less imputed interest(8,513)
Total$32,197 
The weighted-average remaining lease term of our operating leases is approximately 6.66 years.
Legal Contingencies
From time to time, we may be involved in disputes, including litigation, relating to claims arising out of operations in the normal course of our business. Any of these claims could subject us to costly legal expenses and, while we generally believe that we have adequate insurance to cover many different types of liabilities, our insurance carriers may deny coverage or our policy limits may be inadequate to fully satisfy any damage awards or settlements. If this were to happen, the payment of any such awards could have a material adverse effect on our consolidated results of operations and financial position. Additionally, any such claims, whether or not successful, could damage our reputation and business. We currently are not a party to any legal proceedings, the adverse outcome of which, in our opinion, individually or in the aggregate, would have a material adverse effect on our consolidated results of operations or financial position.
v3.24.0.1
Income Taxes
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Total income (loss) before income taxes summarized by region was as follows (in thousands):
Year Ended December 31,
202320222021
United States$348,828 $248,918 $248,071 
Foreign(499)— 447 
Net income before income taxes$348,329 $248,918 $248,518 
Significant components of our net deferred tax assets (liabilities) were as follows (in thousands).
December 31,
20232022
Deferred tax assets
Net operating loss carryforwards$32,753 $32,887 
Deferred revenue31 837 
Research and development and orphan drug credits38,192 96,133 
Share-based compensation5,024 6,353 
ASC 842 lease liability7,258 2,480 
Capitalized research expense19,543 10,168 
Transaction related expense— 2,354 
Inventory related reserves13,561 18,395 
Other, net6,715 3,054 
Total deferred tax assets
123,077 172,661 
Valuation allowance for deferred tax assets(2,588)(707)
Deferred tax assets, net of valuation allowance120,489 171,954 
Deferred tax liabilities
Non-deductible book amortization (103,492)(115,578)
Depreciation(3,522)(2,559)
ASC 842 right of use asset(8,259)(9,061)
Other, net(830)(330)
Total deferred tax liabilities(116,103)(127,528)
Net deferred tax asset $4,386 $44,426 
A valuation allowance of $2.6 million and $0.7 million has been established to offset the net DTAs as of December 31, 2023 and 2022, respectively, as realization of such assets is uncertain.
On a periodic basis, we reassess the valuation allowance of our DTAs, weighing all positive and negative evidence, to assess if it is more-likely-than-not that some or all of our DTAs will be realized. In 2021, we demonstrated profitability and cumulative pretax income and are forecasting income growth in future tax years. After assessing both the positive and negative evidence, we determined that it was more likely than not that our DTAs would be realized and released the valuation allowance in 2021.
On May 24, 2022, we acquired the outstanding shares of Antares. This transaction was treated as a non-taxable acquisition. We have increased our DTLs by approximately $119.7 million related to the acquired intellectual property and a step-up to the value of the inventory, the amortization of which will not be tax deductible.
Income tax expense (benefit) was comprised of the following components (in thousands):
Year Ended December 31,
202320222021
Current - federal$24,963 $6,157 $(9)
Current - state5,717 2,525 1,251 
Deferred - federal34,037 44,757 (117,925)
Deferred - state2,018 (6,650)(37,509)
Total income tax expense (benefit)
$66,735 $46,789 $(154,192)
The provision for income taxes on earnings subject to income taxes differs from the statutory federal income tax rate due to the following:
Year Ended December 31,
202320222021
Federal income tax expense
21.00 %21.00 %21.00 %
State income tax expense, net of federal income tax impact
2.76 %0.82 %2.67 %
Decrease in valuation allowance
— %(0.39)%(84.92)%
Foreign income subject to tax at other than federal statutory rate0.03 %— %0.02 %
Share-based compensation(0.21)%(0.66)%(2.50)%
Executive compensation limitation0.90 %2.61 %2.32 %
Non-deductible expenses and other0.80 %(0.40)%0.54 %
Foreign-derived intangible income(3.44)%(5.06)%(1.18)%
Transaction costs— %0.88 %— %
Research and development credits, net(2.71)%— %— %
Effective income tax rate
19.13 %18.80 %(62.05)%
As of December 31, 2023, our unrecognized tax benefit and uncertain tax positions were $21.9 million, which will impact the effective tax rate when resolved. Of the unrecognized tax benefits, we do not expect any significant changes to occur in the next 12 months. Interest and/or penalties related to uncertain income tax positions are recognized by us as a component of income tax expense. For the years ended December 31, 2023, 2022 and 2021, we recognized an immaterial amount of interest and penalties.
The following table summarizes the activity related to our unrecognized tax benefits (in thousands):
Year Ended December 31,
202320222021
Gross unrecognized tax benefits, beginning of period
$19,482 $17,692 $19,167 
Increases in tax positions for prior years1,645 — 21 
Decreases in tax positions for prior years and lapse in statute of limitations
— (1,148)(1,496)
Increases in tax positions related to business acquisition— 2,151 — 
Increases in tax positions for current year 791 787 — 
Gross unrecognized tax benefits, end of period$21,918 $19,482 $17,692 
As of December 31, 2023, we had federal, California and other state tax net operating loss carryforwards of approximately $46.8 million, $235.8 million and $66.8 million, respectively. The California and Minnesota net operating loss carryforwards begin to expire in 2037 and 2028, respectively.
As of December 31, 2023, we had federal and California research and development tax credit carryforwards of approximately $38.4 million, and $24.8 million, respectively. The federal research and development tax credits will begin to expire in 2030 unless previously utilized. The California research and development tax credits will carryforward indefinitely until utilized.
Pursuant to Internal Revenue Code Section 382, the annual use of the net operating loss carryforwards and research and development tax credits could be limited by any greater than 50% ownership change during any three-year testing period. As a result of any such ownership change, portions of our net operating loss carryforwards and research and development tax credits are subject to annual limitations. We completed an updated Section 382 analysis regarding the limitation of the net operating losses and research and development credits as of the acquisition of Antares. Based upon the analysis, we determined that ownership changes occurred in prior years; however, the annual limitations on net operating loss and research and development tax credit carryforwards will not have a material impact on the future utilization of such carryforwards.
We do not provide for U.S. income taxes on the undistributed earnings of our foreign subsidiary as it is our intention to utilize those earnings in the foreign operations for an indefinite period of time. As of December 31, 2023 and 2022, there were no undistributed earnings in foreign subsidiaries.
We are subject to taxation in the U.S. and in various state and foreign jurisdictions. Our tax years for 2008 and forward are subject to examination by the U.S., California, and Minnesota tax authorities due to the carryforward of unutilized net operating losses and research and development credits.
v3.24.0.1
Employee Savings Plan
12 Months Ended
Dec. 31, 2023
Retirement Benefits [Abstract]  
Employee Savings Plan Employee Savings Plan
We have an employee savings plan pursuant to Section 401(k) of the Internal Revenue Code. All employees are eligible to participate, provided they meet the requirements of the plan. We are not required to make matching contributions under the plan. However, we voluntarily contributed to the plan approximately $3.3 million, $2.6 million and $1.1 million for the years ended December 31, 2023, 2022 and 2021, respectively.
v3.24.0.1
Schedule II Valuation and Qualifying Accounts
12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II Valuation and Qualifying Accounts
Valuation and Qualifying Accounts
(in thousands)
Balance at Beginning of PeriodAcquiredAdditionsDeductionsBalance at End of Period
For the year ended December 31, 2023
Accounts receivable allowances (1)
$1,914 $— $49,596 $(44,763)$6,747 
For the year ended December 31, 2022
Accounts receivable allowances (1)
$1,140 $924 $5,946 $(6,096)$1,914 
For the year ended December 31, 2021
Accounts receivable allowances (1)
$1,003 $— $8,131 $(7,994)$1,140 
(1)Allowances are for chargebacks, prompt payment discounts and distribution fees related to proprietary product sales.
v3.24.0.1
Pay vs Performance Disclosure - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Pay vs Performance Disclosure      
Net income $ 281,594 $ 202,129 $ 402,710
v3.24.0.1
Insider Trading Arrangements
3 Months Ended
Dec. 31, 2023
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted false
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
v3.24.0.1
Summary of Significant Accounting Policies (Policies)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Use of Estimates
Use of Estimates
The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“U.S. GAAP”) requires us to make estimates and assumptions that affect the amounts reported in our consolidated financial statements and accompanying notes. On an ongoing basis, we evaluate our estimates and judgments, which are based on historical and anticipated results and trends and on various other assumptions that we believe to be reasonable under the circumstances. By their nature, estimates are subject to an inherent degree of uncertainty and, as such, actual results may differ from our estimates.
Cash Equivalents
Cash Equivalents and Marketable Securities
Cash equivalents consist of highly liquid investments, readily convertible to cash, which mature within 90 days or less from the date of purchase. As of December 31, 2023, our cash and cash equivalents consisted of money market funds, bank certificate of deposits, U.S. treasury securities and demand deposits at commercial banks.
Marketable Securities
Marketable securities are investments with original maturities of more than 90 days from the date of purchase that are specifically identified to fund current operations. Marketable securities are considered available-for-sale. These investments are classified as current assets, even though the stated maturity date may be one year or more beyond the current balance sheet date which reflects management’s intention to use the proceeds from the sale of these investments to fund our operations, as necessary. Such available-for-sale investments are carried at fair value with unrealized gains and losses recorded in other comprehensive income (loss) and included as a separate component of stockholders’ equity. The cost of marketable securities is adjusted for amortization of premiums or accretion of discounts to maturity, and such amortization or accretion is included in investment and other income, net in our consolidated statements of income. We use the specific identification method for calculating realized gains and losses on marketable securities sold. None of the realized gains and losses and declines in value that were judged to be as a result of credit loss on marketable securities, if any, are included in investment and other income, net in our consolidated statements of income.
Restricted Cash
Restricted Cash
Under the lease terms of our facilities, we may be required to maintain letters of credit as security deposits during the terms of such leases. As of December 31, 2023, no restricted cash remained pledged as collateral for the letters of credit as the associated lease was terminated. As of December 31, 2022, restricted cash of $0.5 million was pledged as collateral for the letters of credit.
Fair Value of Financial Instruments
Fair Value of Financial Instruments
The authoritative guidance for fair value measurements establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions.
Our financial instruments include cash equivalents, available-for-sale marketable securities, accounts receivable, prepaid expenses and other assets, accounts payable, accrued expenses and long-term debt. Fair value estimates of these instruments are made at a specific point in time based on relevant market information. These estimates may be subjective in nature and involve uncertainties and matters of significant judgment and therefore, cannot be determined with precision. The carrying amount of cash equivalents, accounts receivable, prepaid expenses and other assets, accounts payable and accrued expenses are generally considered to be representative of their respective fair values because of the short-term nature of those instruments.
Available-for-sale marketable securities consist of asset-backed securities, corporate debt securities, U.S. Treasury securities, agency bonds and commercial paper, and are measured at fair value using Level 1 and Level 2 inputs. Level 2 financial instruments are valued using market prices on less active markets and proprietary pricing valuation models with observable inputs, including interest rates, yield curves, maturity dates, issue dates, settlement dates, reported trades, broker-dealer quotes, issue spreads, benchmark securities or other market related data. We obtain the fair value of Level 2 investments from our investment manager, who obtains these fair values from a third-party pricing source. We validate the fair values of Level 2 financial instruments provided by our investment manager by comparing these fair values to a third-party pricing source.
Concentration of Credit Risk, Sources of Supply and Significant Customers
Concentrations of Credit Risk, Sources of Supply and Significant Customers
We are subject to credit risk from our portfolio of cash equivalents and marketable securities. These investments were made in accordance with our investment policy which specifies the categories, allocations, and ratings of securities we may consider for investment. The primary objective of our investment activities is to preserve principal while at the same time maximizing the income we receive without significantly increasing risk. We maintain our cash and cash equivalent balances with two major commercial banks and marketable securities with one other financial institution. Deposits held with the financial institutions exceed the amount of insurance provided on such deposits. We are exposed to credit risk in the event of a default by the financial institutions holding our cash, cash equivalents and marketable securities to the extent recorded on the consolidated balance sheets.
We are also subject to credit risk from our accounts receivable related to our product sales and revenues under our license and collaborative agreements. We have license and collaborative agreements with pharmaceutical companies under which we receive payments for royalties, license fees, milestone payments for specific achievements designated in the collaborative agreements, reimbursements of research and development services and supply of bulk formulation of rHuPH20. In addition, we sell proprietary products in the United States (“U.S.”) to a limited number of established wholesale distributors in the pharmaceutical industry. Credit is extended based on an evaluation of the customer’s financial condition, and collateral is not required. Management monitors our exposure to accounts receivable by periodically evaluating the collectability of the accounts receivable based on a variety of factors including the length of time the receivables are past due, the financial health of the customer and historical experience. Based upon the review of these factors, we recorded no allowance for doubtful accounts as of December 31, 2023 and 2022. Approximately 69% of the accounts receivable balance as of December 31, 2023 represents amounts due from Janssen, Roche and Teva. Approximately 52% of the accounts receivable balance as of December 31, 2022 represents amounts due from Janssen and Roche.
The following table indicates the percentage of total revenues in excess of 10% with any single customer:
Year Ended December 31,
202320222021
Partner A
44%46%48%
Partner B
19%20%25%
Partner C
10%—%—%
Partner D
—%—%10%
We attribute revenues under collaborative agreements, including royalties, to the individual countries where the customer is headquartered. We attribute revenues from product sales to the individual countries to which the product is shipped. Worldwide revenues from external customers are summarized by geographic location in the following table (in thousands):
Year Ended December 31,
202320222021
United States$587,196 $437,989 $293,089 
Switzerland149,024 166,836 134,117 
Belgium58,354 2,088 199 
Japan15,096 47,939 11,934 
All other foreign19,583 5,264 3,971 
Total revenues$829,253 $660,116 $443,310 
Accounts Receivable, Net
Accounts Receivable, net
Accounts receivable is recorded at the invoiced amount and is non-interest bearing. Accounts receivable is recorded net of cash discounts for prompt payment, distribution fees and chargebacks. We recorded no allowance for doubtful accounts as of December 31, 2023 and 2022 as the collectability of accounts receivable was reasonably assured.
Inventories
Inventories
Inventories are stated at lower of cost or net realizable value. Cost is determined on a first-in, first-out basis. Net realizable value is the estimated selling price in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. Inventories are reviewed periodically for potential excess, dated or obsolete status. We evaluate the carrying value of inventories on a regular basis, taking into account such factors as historical and anticipated future sales compared to quantities on hand, the price we expect to obtain for products in their respective markets compared with historical cost and the remaining shelf life of goods on hand.
Leases
Leases
We have entered into operating leases primarily for real estate and automobiles. These leases have contractual terms which range from 3 years to 12 years. We determine if an arrangement contains a lease at inception. Right of use (“ROU”) assets and liabilities resulting from operating leases are included in property and equipment, accrued expenses and other long-term liabilities on our consolidated balance sheets. Operating lease ROU assets and liabilities are recognized based on the present value of the future minimum lease payments over the lease term at commencement date. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the discount rate to calculate the present value of future payments. The operating lease ROU asset also includes any lease payments made and excludes lease incentives and initial direct costs incurred. Our leases often include options to extend or terminate the lease. These options are included in the lease term when it is reasonably certain that we will exercise that option. Short-term leases with an initial term of 12 months or less are not recorded on the balance sheet. Lease expense for minimum lease payments is recognized on a straight-line basis over the lease term.
We have lease agreements with lease and non-lease components, which are generally accounted for separately. For certain leases, such as automobiles, we account for the lease and non-lease components as a single lease component.
Property and Equipment, Net
Property and Equipment, Net
Property and equipment, including ROU assets are recorded at cost, less accumulated depreciation and amortization. Equipment is depreciated using the straight-line method over its estimated useful life ranging from three years to ten years and leasehold improvements are amortized using the straight-line method over the estimated useful life of the asset or the lease term, whichever is shorter.
Impairment of Long-Lived Assets
Impairment of Long-Lived Assets
We account for long-lived assets in accordance with authoritative guidance for impairment or disposal of long-lived assets. Long-lived assets are reviewed for events or changes in circumstances, which indicate that their carrying value may not be recoverable.
Comprehensive Income
Comprehensive Income
Comprehensive income is defined as the change in equity during the period from transactions and other events and circumstances from non-owner sources.
Convertible Notes
Convertible Notes
The 2024 Convertible Notes, the 2027 Convertible Notes and the 2028 Convertible Notes (collectively, the “Convertible Notes”) are accounted for in accordance with authoritative guidance for debt and derivatives. We evaluate all the embedded conversion options contained in the Convertible Notes to determine if there are embedded features that require bifurcation as a derivative as required by U.S. GAAP. Based on our analysis, we account for each of our Convertible Notes as single units of accounting, a liability, because we concluded that the conversion features do not require bifurcation as a derivative under embedded derivative authoritative guidance.
Cash Flow Hedges - Currency Risks
Cash Flow Hedges - Currency Risks
Beginning in the second quarter of 2023, we entered into a cash flow hedging program to mitigate foreign currency exchange risk associated with forecasted royalty revenue denominated in Swiss francs. Under the program, we can hedge these forecasted royalties up to a maximum of four years into the future. We hedge these cash flow exposures to reduce the risk of our earnings and cash flows being adversely affected by fluctuations in exchange rates.
In accordance with the hedge accounting treatment, all hedging relationships are formally documented at the inception of the hedge and are highly effective in offsetting changes to future cash flows on hedged transactions. Both at inception of the hedge and on an ongoing basis, we assess whether the foreign currency forward contracts are highly effective in offsetting changes in cash flows of hedged items on a prospective and retrospective basis. If we determine a (i) foreign currency forward contract is not highly effective as a cash flow hedge, (ii) foreign currency forward contract has ceased to be a highly effective hedge or (iii) forecasted transaction is no longer probable of occurring, we would discontinue hedge accounting treatment prospectively. We measure effectiveness based on the change in fair value of the forward currency forward contract and the fair value of the hypothetical foreign currency forward contract with terms that match the critical terms of the risk being hedged. No portion of our foreign currency forward contracts were excluded from the assessment of hedge effectiveness. As of December 31, 2023, all hedges were determined to be highly effective.
The assets or liabilities associated with our hedging contracts are recorded at fair market value in prepaid expense and other current assets, accrued expenses, or other long-term liabilities, respectively, in our consolidated balance sheets. Gains and losses related to changes in the fair market value of these hedging contracts are recorded as a component of accumulated other comprehensive income (loss) (“AOCI”) within stockholder’s equity in our consolidated balance sheets and reclassified to royalty revenue in our consolidated statements of income in the same period as the recognition of the underlying hedged transaction. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, within the defined hedge period, we reclassify the gains or losses on the related cash flow hedge from AOCI to royalties revenue in our consolidated statements of income. Settlements from the cash flow hedge are included in operating activities on the Consolidated Statements of Cash Flows. Since the fair market value of these hedging contracts is derived from current market rates, the hedging contracts are classified as derivative financial instruments. We do not use derivatives for speculative or trading purposes. As of December 31, 2023, amounts expected to be recognized as a net gain out of AOCI into our consolidated statements of income during the next 12 months, are not material.
Business Combinations
Business Combinations
Under the acquisition method of accounting, we allocate the fair value of the total consideration transferred to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values on the date of acquisition. These valuations require us to make estimates and assumptions, especially with respect to intangible assets. We record the excess consideration over the aggregate fair value of tangible and intangible assets, net of liabilities assumed, as goodwill. Costs incurred to complete a business combination, such as legal and other professional fees, are expensed as incurred.
If the initial accounting for a business combination is incomplete by the end of a reporting period that falls within the measurement period, we report provisional amounts in our financial statements. During the measurement period, we adjust the provisional amounts recognized at the acquisition date to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. We record these adjustments to the provisional amounts with a corresponding offset to goodwill. Any adjustments identified after the measurement period are recorded in our consolidated statements of income.
Goodwill and Intangible Assets
Goodwill, Intangible Assets and Other Long-Lived Asset
Assets acquired, including intangible assets and in-process research and development (“IPR&D”), and liabilities assumed are measured at fair value as of the acquisition date. Goodwill, which has an indefinite useful life, represents the excess of cost over fair value of the net assets acquired. Intangible assets acquired in a business combination that are used for IPR&D activities are considered indefinite lived until the completion or abandonment of the associated research and development efforts. Upon reaching the end of the relevant research and development project (i.e., upon commercialization), the IPR&D asset is amortized over its estimated useful life. If the relevant research and development project is abandoned, the IPR&D asset is expensed in the period of abandonment.
Goodwill and IPR&D are not amortized; however, they are reviewed for impairment at least annually during the second quarter, or more frequently if an event occurs indicating the potential for impairment. Goodwill and IPR&D are considered to be impaired if the carrying value of the reporting unit or IPR&D asset exceeds its respective fair value.
We perform our goodwill impairment analysis at the reporting unit level, which aligns with our reporting and operating segment structure and availability of discrete financial information. During the goodwill impairment review, we assess qualitative factors to determine whether it is more likely than not that the fair values of our reporting unit is less than the
carrying amount, including goodwill. The qualitative factors include, but are not limited to, macroeconomic conditions, industry and market considerations, and our overall financial performance. If, after assessing the totality of these qualitative factors, we determine that it is not more likely than not that the fair value of our reporting unit is less than the carrying amounts, then no additional assessment is deemed necessary. Otherwise, we proceed to compare the estimated fair value of the reporting unit with the carrying value, including goodwill. If the carrying amount of the reporting unit exceeds the fair value, we record an impairment loss based on the difference. We may elect to bypass the qualitative assessment in a period and proceed to perform the quantitative goodwill impairment test.
Our identifiable intangible assets with finite useful lives are typically comprised of acquired device technologies and product rights. The cost of identifiable intangible assets with finite lives is generally amortized on a straight-line basis over the assets’ respective estimated useful lives.
Intangible Assets and Other Long-Lived Assets
We perform regular reviews to determine if any event has occurred that may indicate intangible assets with finite useful lives and other long-lived assets are potentially impaired. If indicators of impairment exist, an impairment test is performed to assess the recoverability of the affected assets by determining whether the carrying amount of such assets exceeds the undiscounted expected future cash flows. If the affected assets are not recoverable, we estimate the fair value of the assets and record an impairment loss if the carrying value of the assets exceeds the fair value. Factors that may indicate potential impairment include a significant decline in our stock price and market capitalization compared to the net book value, significant changes in the ability of a particular asset to generate positive cash flows for our strategic business objectives, and the pattern of utilization of a particular asset.
Revenue Recognition
Revenue Recognition
We generate revenues from payments received (i) as royalties from licensing our ENHANZE technology and other royalty arrangements, (ii) under collaborative agreements and (iii) from sales of our proprietary and partnered products. We recognize revenue when we transfer promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. To determine revenue recognition for contracts with customers, we perform the following five steps: (i) identify the promised goods or services in the contract; (ii) identify the performance obligations in the contract, including whether they are distinct in the context of the contract; (iii) determine the transaction price, including the constraint on variable consideration; (iv) allocate the transaction price to the performance obligations in the contract; and (v) recognize revenue when (or as) we satisfy the performance obligations.
ENHANZE and Device Royalties
Under the terms of our ENHANZE collaboration and license agreements, our partners will pay us royalties at an on average mid-single digit percent rate of their sales if products under the collaboration are commercialized. All amounts owed to us are noncancelable after the underlying triggering event occurs, and nonrefundable once paid. Unless terminated earlier in accordance with its terms, collaborations generally continue in effect until the last to expire royalty payment term, as determined on a product by product and country by country basis, with each royalty term starting on the first commercial sale of that product and ending the later of: (i) a specified period or term set forth in the agreement or (ii) expiration of the last to expire of the valid claims of our patents covering rHuPH20 or other specified patents developed under the collaboration which valid claim covers a product developed under the collaboration. In general, when there are no valid claims of a specified patent developed under the collaboration covering the product in a given country, the royalty rate is reduced for those sales in that country upon the expiration of our patents covering rHuPH20. Janssen’s patents covering DARZALEX SC do not impact the timing for this royalty reduction. Partners may terminate the agreement prior to expiration for any reason in its entirety or on a target-by-target basis generally upon 90 days prior written notice to us. Upon any such termination, the license granted to partners (in total or with respect to the terminated target, as applicable) will terminate provided; however, that in the event of expiration of the agreement (as opposed to a termination), the on-going licenses granted will become perpetual, non-exclusive and fully paid. Sales-based milestones and royalties are recognized in the period the underlying sales or milestones occur. We do not receive final royalty reports from our ENHANZE partners until after we complete our financial statements for a prior quarter. Therefore, we recognize revenue based on estimates of the royalty earned, which are based on internal estimates and available preliminary reports provided by our partners. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.
We also earn royalties in connection with several of our licenses granted under license and development arrangements with our device partners. These royalties are based upon a percentage of commercial sales of partnered products with rates ranging from mid-single digits to low double digits and are tiered based on levels of net sales. These sales-based royalties, for which the license was deemed the predominant element to which the royalties relate, are estimated and recognized in the period in which the partners’ commercial sales occur. The royalties are generally reported and payable to us within 45 to 60 days after the end of the period in which the commercial sales are made. We base our estimates of royalties earned on actual sales information from our partners when available or estimated, prescription sales from external sources and estimated net selling
price. We will record adjustments in the following quarter, if necessary, when final royalty reports are received. To date, we have not recorded any material adjustments.
Revenue under ENHANZE and Device Collaborative Agreements
ENHANZE Collaboration and License Agreements
Under these agreements, we grant the collaboration partner a worldwide license to develop and commercialize products using our ENHANZE technology to combine our patented rHuPH20 enzyme with their proprietary biologics directed at up to a specified number of targets. Targets are usually licensed on an exclusive, global basis. Targets selected subsequent to inception of the arrangement generally require payment of an additional license fee. The collaboration partner is responsible for all development, manufacturing, clinical, regulatory, sales and marketing costs for any products developed under the agreement. We are responsible for supply of bulk rHuPH20 based on the collaboration partner’s purchase orders, and may also be separately engaged to perform research and development services. While these collaboration agreements are similar in that they originate from the same framework, each one is the result of an arms-length negotiation and thus may vary from one to the other.
We generally collect an upfront license payment from collaboration partners, and are also entitled to receive event-based payments subject to collaboration partners’ achievement of specified development, regulatory and sales-based milestones. In several agreements, collaboration partners pay us annual fees to maintain their exclusive license rights if they are unable to advance product development to specified stages. We earn separate fees for bulk rHuPH20 supplies and research and development services.
Although these agreements are in form identified as collaborative agreements, we concluded for accounting purposes they represent contracts with customers and are not subject to accounting literature on collaborative arrangements. This is because we grant to partners licenses to our intellectual property and provide supply of bulk rHuPH20 and research and development services which are all outputs of our ongoing activities, in exchange for respective consideration. Under these collaborative agreements, our partners lead development of assets, and we do not share in significant financial risks of their development or commercialization activities. Accordingly, we concluded our collaborative agreements are appropriately accounted for pursuant to U.S. GAAP.
Under all of our ENHANZE collaborative agreements, we have identified licenses to use functional intellectual property as the only performance obligation. The intellectual property underlying the license is our proprietary ENHANZE technology which represents application of rHuPH20 to facilitate delivery of drugs. Each of the licenses grants the partners rights to use our intellectual property as it exists and is identified on the effective date of the license, because there is no ongoing development of the ENHANZE technology required. Therefore, we recognize revenue from licenses at the point when the license becomes effective and the partner has received access to our intellectual property, usually at the inception of the agreement.
When partners can select additional targets to add to the licenses granted, we consider these rights to be options. We evaluate whether such options contain material rights, i.e. have exercise prices that are discounted compared to what we would charge for a similar license to a new partner. The exercise price of these options includes a combination of the target selection fees, event-based milestone payments and royalties. When these amounts in aggregate are not offered at a discount that exceeds discounts available to other customers, we conclude the option does not contain a material right, and we consider grants of additional licensing rights upon option exercises to be separate contracts (target selection contracts).
Generally, we provide indemnification and protection of licensed intellectual property for our customers. These provisions are part of assurance that the licenses meet the agreements’ representations and are not obligations to provide goods or services.
We also fulfill purchase orders for supply of bulk rHuPH20 and perform research and development services pursuant to projects authorization forms for our partners, which represent separate contracts. In addition to our licenses, we price our supply of bulk rHuPH20 and research and development services at our regular selling prices, called standalone selling prices (“SSP”). Therefore, our partners do not have material rights to order these items at prices not reflective of SSP. Refer to the discussion below regarding recognition of revenue for these separate contracts.
Transaction price for a contract represents the amount to which we are entitled in exchange for providing goods and services to the customer. Transaction price does not include amounts subject to uncertainties unless it is probable that there will be no significant reversal of revenue when the uncertainty is resolved. Apart from the upfront license payment (or target selection fees in the target selection contracts), all other fees we may earn under our collaborative agreements are subject to significant uncertainties of product development. Achievement of many of the event-based development and regulatory milestones may not be probable until such milestones are actually achieved. This generally relates to milestones such as obtaining marketing authorization approvals. With respect to other development milestones, e.g., dosing of a first patient in a clinical trial, achievement could be considered probable prior to its actual occurrence, based on the progress towards commencement of the trial. In order to evaluate progress towards commencement of a trial, we assess the status of activities
leading up to our partner’s initiation of a trial such as feedback received from the applicable regulatory authorities, completion of Investigational New Drug (“IND”) or equivalent filings, readiness and availability of drug, readiness of study sites and our partner’s commitment of resources to the program. We do not include any amounts subject to uncertainties in the transaction price until it is probable that the amount will not result in a significant reversal of revenue in the future. At the end of each reporting period, we re-evaluate the probability of achievement of such milestones and any related constraint, and if necessary, adjust our estimate of the overall transaction price.
When target exchange rights are held by partners, and the amounts attributed to these rights are not refundable, they are included in the transaction price. However, they are recorded as deferred revenues because we have a potential performance obligation to provide a new target upon an exchange right being exercised. These amounts are recognized in revenue when the right of exchange expires or is exercised.
Because our agreements have one type of performance obligation (licenses) which are typically all transferred at the same time at agreement inception, allocation of transaction price often is not required. However, allocation is required when licenses for some of the individual targets are subject to rights of exchange, because revenue associated with these targets cannot be recognized. When allocation is needed, we perform an allocation of the upfront amount based on relative SSP of licenses for individual targets. We determine license SSP using an income-based valuation approach utilizing risk-adjusted discounted cash flow projections of the estimated return a licensor would receive. When amounts subject to uncertainties, such as milestones and royalties, are included in the transaction price, we attribute them to the specific individual target licenses which generate such milestone or royalty amounts.
We also estimate SSP of bulk rHuPH20 and research and development services, to determine that our partners do not have material rights to order them at discounted prices. For supplies of bulk rHuPH20, because we effectively act as a contract manufacturer to our partners, we estimate and charge SSP based on the typical contract manufacturer margins consistent with all of our partners. We determine SSP of research and development services based on a fully-burdened labor rate. Our rates are comparable to those we observe in other collaborative agreements. We also have a history of charging similar rates to all of our partners.
Upfront amounts allocated to licenses to individual targets are recognized as revenue when the license is transferred to the partner, as discussed above, if the license is not subject to exchange rights, or when the exchange right expires or is exercised. Development milestones and other fees are recognized in revenue when they are included in the transaction price, because by that time, we have already transferred the related license to the partner.
In contracts to provide research and development services, such services represent the only performance obligation. The fees are charged based on hours worked by our employees and the fixed contractual rate per hour, plus third-party pass-through costs, on a monthly basis. We recognize revenues as the related services are performed based on the amounts billed, as the partner consumes the benefit of research and development work simultaneously as we perform these services, and the amounts billed reflect the value of these services to the customer.
Device License, Development and Supply Arrangements
We have several license, development and supply arrangements with pharmaceutical partners, under which we grant a license to our device technology and provide research and development services that often involve multiple performance obligations and highly-customized deliverables. For such arrangements, we identify each of the promised goods and services within the contract and the distinct performance obligations at inception of the contract and allocate consideration to each performance obligation based on relative SSP, which is generally determined based on the expected cost plus mark-up.
If the contract includes an enforceable right to payment for performance completed to date and performance obligations are satisfied over time, we recognize revenue over the development period using either the input or output method depending on which is most appropriate given the nature of the distinct deliverable. For other contracts that do not contain an enforceable right to payment for performance completed to date, revenue is recognized when control of the product is transferred to the customer. Factors that may indicate transfer of control has occurred include the transfer of legal title, transfer of physical possession, the customer has obtained the significant risks and rewards of ownership of the assets, and we have a present right to payment.
Our typical payment terms for development contracts may include an upfront payment equal to a percentage of the total contract value with the remaining portion to be billed upon completion and transfer of the individual deliverables or satisfaction of the individual performance obligations. We record a contract liability for cash received in advance of performance, which is presented within deferred revenue and deferred revenue, long-term in our consolidated balance sheets and recognized as revenue in our consolidated statements of income when the associated performance obligations have been satisfied.
License fees and milestones received in exchange for the grant of a license to our functional intellectual property, such as patented technology and know-how in connection with a partnered development arrangement, are generally recognized at
inception of the arrangement, or over the development period depending on the facts and circumstances, as the license is generally not distinct from the non-licensed goods or services to be provided under the contract. Milestone payments that are contingent upon the occurrence of future events are evaluated and recorded at the most likely amount, and to the extent that it is probable that a significant reversal of revenue will not occur when the associated uncertainty is resolved.
Refer to Note 5, Revenue, for further discussion on our collaborative arrangements.
Product Sales, Net
Proprietary Product Sales
Our commercial portfolio of proprietary products includes XYOSTED and Hylenex recombinant which we sell primarily to wholesale pharmaceutical distributors and specialty pharmacies, who sell the products to hospitals, retail chain drug stores and other end-user customers. Sales to wholesalers are made pursuant to purchase orders subject to the terms of a master agreement, and delivery of individual packages of products represents performance obligations under each purchase order. We use contract manufacturers to produce our proprietary products and third-party logistics (“3PL”) vendors to process and fulfill orders. We concluded we are the principal in the sales to wholesalers because we control access to services rendered by both vendors and direct their activities. We have no significant obligations to wholesalers to generate pull-through sales.
Revenue is recognized when control has transferred to the customer, which is typically upon delivery, at the net selling price, which reflects the variable consideration for which reserves and sales allowances are established for estimated returns, wholesale distribution fees, prompt payment discounts, government rebates and chargebacks, plan rebate arrangements and patient discount and support programs. We recognize revenue from product sales and related cost of sales upon product delivery to the wholesaler location. At that time, the wholesalers take control of the product as they take title, bear the risk of loss of ownership, and have an enforceable obligation to pay us. They also have the ability to direct sales of product to their customers on terms and at prices they negotiate. Although wholesalers have product return rights, we do not believe they have a significant incentive to return the product to us.
The determination of certain reserves and sales allowances requires us to make a number of judgements and estimates to reflect our best estimate of the transaction price and the amount of consideration to which we believe we would be ultimately entitled to receive. The expected value is determined based on unit sales data, contractual terms with customers and third-party payers, historical and estimated future percentage of rebates incurred on sales, historical and future insurance plan billings, any new or anticipated changes in programs or regulations that would impact the amount of the actual rebates, customer purchasing patterns, product expiration dates and levels of inventory in the distribution channel. The estimated amounts of credit for product returns, chargebacks, distribution fees, prompt payment discounts, rebates and customer co-pay support programs are included in accrued expenses and accounts receivable, net in our consolidated balance sheets upon recognition of revenue from product sales. We monitor actual product returns, chargebacks, discounts and fees subsequent to the sale. If these amounts differ from our estimates, we make adjustments to these allowances, which are applied to increase or reduce product sales revenue and earnings in the period of adjustment.
Selling prices initially billed to wholesalers are subject to discounts for prompt payment and subsequent chargebacks when wholesalers sell our products at negotiated discounted prices to members of certain group purchasing organizations (“GPOs”), Pharmacy Benefit Managers (“PBMs”) and government programs. We also pay quarterly distribution fees to certain wholesalers for inventory reporting and chargeback processing, and to PBMs and GPOs as administrative fees for services and for access to their members. We concluded the benefits received in exchange for these fees are not distinct from our sales of our products, and accordingly we apply these amounts to reduce revenues. Wholesalers also have rights to return unsold product nearing or past the expiration date. Because of the shelf life of our products and our lengthy return period, there may be a significant period of time between when the product is shipped and when we issue credits on returned product.
We estimate the transaction price when we receive each purchase order taking into account the expected reductions of the selling price initially billed to the wholesaler arising from all of the above factors. We have compiled historical experience and data to estimate future returns and chargebacks of our products and the impact of the other discounts and fees we pay. When estimating these adjustments to the transaction price, we reduce it sufficiently to be able to assert that it is probable that there will be no significant reversal of revenue when the ultimate adjustment amounts are known.
Each purchase order contains only one type of product, and is usually shipped to the wholesaler in a single shipment. Therefore, allocation of the transaction price to individual packages is not required.
In connection with the orders placed by wholesalers, we incur costs such as commissions to our sales representatives. However, as revenue from product sales is recognized upon delivery to the wholesaler, which occurs shortly after we receive a purchase order, we do not capitalize these commissions and other costs, based on application of the practical expedient allowed within the applicable guidance.
Partnered Product Sales
Bulk rHuPH20
We sell bulk rHuPH20 to partners for use in research and development and, subsequent to receiving marketing approval, we sell it for use in collaboration commercial products. Sales are made pursuant to purchase orders subject to the terms of the collaborative agreement or a supply agreement, and delivery of units of bulk rHuPH20 represent performance obligations under each purchase order. We provide a standard warranty that the product conforms to specifications. We use contract manufacturers to produce bulk rHuPH20 and have concluded we are the principal in the sales to partners. The transaction price for each purchase order of bulk rHuPH20 is fixed based on the cost of production plus a contractual markup, and is not subject to adjustments. Allocation of the transaction price to individual quantities of the product is usually not required because each order contains only one type of product.
We recognize revenue from the sale of bulk rHuPH20 as product sales and related cost of sales upon transfer of title to our partners. At that time, the partners take control of the product, bear the risk of loss of ownership, and have an enforceable obligation to pay us.
Devices
We are party to several license, development, supply and distribution arrangements with pharmaceutical partners, under which we produce and are the exclusive supplier of certain products, devices and/or components. Revenue is recognized when or as control of the goods transfers to the customer as discussed below.
We are the exclusive supplier of OTREXUP® to Otter. Because this product is custom manufactured with no alternative use and we have a contractual right to payment for performance completed to date, control is continuously transferred to the customer as the product is produced pursuant to firm purchase orders. Revenue is recognized over time using the output method based on the contractual selling price and number of units produced. The amount of revenue recognized in excess of the amount shipped/billed to the customer, if any, is recorded as contract assets in our consolidated balance sheets due to the short-term nature in which the amount is ultimately expected to be billed and collected from the customer.
All other device partnered product sales are recognized at the point in time in which control is transferred to the customer, which is typically upon shipment. Sales terms and pricing are governed by the respective supply and distribution agreements, and there is generally no right of return. Revenue is recognized at the transaction price, which includes the contractual per unit selling price and estimated variable consideration, such as volume-based pricing arrangements or profit-sharing arrangements, if any. We recognize revenue, including the estimated variable consideration we expect to receive for contract margin on future commercial sales, upon shipment of the goods to our partner. The estimated variable consideration is recognized at an amount we believe is not subject to significant reversal of revenue based on historical experience and is adjusted at each reporting period if the most likely amount of expected consideration changes or becomes fixed.
Revenue Presentation
In our consolidated statements of income, we report the upfront payments, event-based development and regulatory milestones and sales milestones as revenues under collaborative agreements. We also include in this category revenues from separate research and development contracts pursuant to project authorization forms. We report royalties received from partners as a separate line in our consolidated statements of income.
Revenues from sales of our proprietary and partnered products are included in product sales, net in our consolidated statements of income.
In the footnotes to our consolidated financial statements, we provide disaggregated revenue information by type of arrangement (royalties; product sales, net; and collaborative agreements), and additionally, by type of payment stream received under collaborative agreements (upfront license and target nomination fees; event-based development and regulatory milestones and other fees; sales-based milestones; and device licensing and development revenue).
Cost of Sales
Cost of Sales
Cost of sales consists primarily of raw materials, third-party manufacturing costs, fill and finish costs, freight costs, internal costs and manufacturing overhead associated with the production of proprietary and partnered products. Cost of sales also consists of the write-down of excess, dated and obsolete inventories and the write-off of inventories that do not meet certain product specifications, if any.
Research and Development Expenses
Research and Development Expenses
Research and development expenses include salaries and benefits, allocation of facilities and other overhead expenses, research related manufacturing services, contract services, and other outside expenses related to manufacturing, preclinical and regulatory activities and our partner development platforms. Research and development expenses are charged to operating expenses as incurred when these expenditures relate to our research and development efforts and have no alternative future uses. 
We are obligated to make upfront payments upon execution of certain research and development agreements. Advance payments, including nonrefundable amounts, for goods or services that will be used or rendered for future research and development activities are deferred. Such amounts are recognized as expense as the related goods are delivered or the related services are performed or such time when we do not expect the goods to be delivered or services to be performed.
Share-Based Compensation
Share-Based Compensation
We record compensation expense associated with stock options, restricted stock units (“RSUs”), performance stock units (“PSUs”) and shares issued under our employee stock purchase plan (“ESPP”) in accordance with the authoritative guidance for share-based compensation. The cost of employee services received in exchange for an award of an equity instrument is measured at the grant date, based on the estimated fair value of the award, and is recognized as expense on a straight-line basis over the requisite service period of the award. Share-based compensation expense for an award with a performance condition is recognized when the achievement of such performance condition is determined to be probable. If the outcome of such performance condition is not determined to be probable or is not met, no compensation expense is recognized and any previously recognized compensation expense is reversed. Forfeitures are recognized as a reduction of share-based compensation expense as they occur.
Income Taxes
Income Taxes
We provide for income taxes using the liability method. Under this method, deferred income tax assets and liabilities are determined based on the differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases at each reporting period. We measure deferred tax assets and liabilities using enacted tax rates for the year in which the differences are expected to reverse. Significant judgment is required by management to determine our provision for income taxes, our deferred tax assets and liabilities, and any associated valuation allowances recorded against our net deferred tax assets, which are based on complex and evolving tax regulations. Deferred tax assets (“DTA”) and other tax benefits are recorded when they are more likely than not to be realized. On a quarterly basis, we assess the need for valuation allowance on our DTAs, weighing all positive and negative evidence, to assess if it is more-likely-than-not that some or all of our DTAs will be realized.
Segment Information Segment InformationWe operate our business in one operating segment, which includes all activities related to the research, development and commercialization of our proprietary enzymes and devices. This segment also includes revenues and expenses related to (i) research and development and manufacturing activities conducted under our collaborative agreements with third parties, and (ii) product sales of proprietary and partnered products. The chief operating decision-maker (“CODM”), our Chief Executive Officer (“CEO”), reviews the operating results on an aggregate basis and manages the operations as a single operating segment
Adoption and Pending Adoption of Recent Accounting Pronouncements
Adoption and Pending Adoption of Recent Accounting Pronouncements
The following table provides a brief description of recently issued accounting standards, those adopted in the current period and those not yet adopted:
StandardDescriptionEffective Date
Adoption Method
Effect on the Financial
Statements or Other Significant Matters
In November 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures.
The new standard is intended to improve annual and interim reportable segment disclosure requirements regardless of number of reporting units, primarily through enhanced disclosures of significant expenses. The amendment requires public entities to disclose significant segment expenses that are regularly provided to the CODM and included within each reported measure of segment profit and loss.
Annual periods beginning after December 15, 2023 (our 2024 Form 10-K), and interim periods within fiscal years beginning after December 15, 2024 (our Q1 2025 Form 10-Q) - Early adoption is permitted, including adoption in an interim period

Retrospective
We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.
In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures.
The new guidance includes amendments that further enhance income tax disclosures, primarily through standardization and disaggregation of rate reconciliation categories and income taxes paid by jurisdiction.
Annual periods beginning after December 15, 2024 (our 2025 Form 10-K) - Early adoption is permitted
Prospective or Retrospective
We are currently evaluating the impact of the standard on our consolidated financial statements and related disclosures.
v3.24.0.1
Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Schedules of Concentration of Risk, by Risk Factor
The following table indicates the percentage of total revenues in excess of 10% with any single customer:
Year Ended December 31,
202320222021
Partner A
44%46%48%
Partner B
19%20%25%
Partner C
10%—%—%
Partner D
—%—%10%
We attribute revenues under collaborative agreements, including royalties, to the individual countries where the customer is headquartered. We attribute revenues from product sales to the individual countries to which the product is shipped. Worldwide revenues from external customers are summarized by geographic location in the following table (in thousands):
Year Ended December 31,
202320222021
United States$587,196 $437,989 $293,089 
Switzerland149,024 166,836 134,117 
Belgium58,354 2,088 199 
Japan15,096 47,939 11,934 
All other foreign19,583 5,264 3,971 
Total revenues$829,253 $660,116 $443,310 
v3.24.0.1
Business Combination (Tables)
12 Months Ended
Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]  
Schedule of Total Purchase Price Consideration
The total purchase consideration was comprised of the following (in thousands):

Cash consideration for Antares shares outstanding as of May 24, 2022$956,886 
Consideration for Antares equity compensation awards (a)
45,828 
Consideration for seller transaction costs paid by Halozyme22,906 
Consideration related to Antares closing indebtedness settled by Halozyme19,683 
Cash consideration related to cash bonus awards paid by Halozyme
365 
Total purchase consideration
$1,045,668 
(a) Consideration for Antares equity compensation awards consists of $32.2 million paid for vested equity awards as well as $13.6 million paid for the pre-combination portion of unvested equity awards that were accelerated as part of the Merger Agreement. The fair value of the unvested equity awards attributable to the post-combination period of $8.7 million is included in our consolidated statements of income during the year ended December 31, 2022.
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed
Amounts recognized as of 12/31/2022
Measurement period adjustment
Amounts recognized as of 12/31/2023 (as adjusted )
Total purchase consideration, net of $46,548 cash acquired
$999,120 $— $999,120 
Assets
Short-term investments498 — 498 
Accounts receivable, net82,160 (200)81,960 
Inventories, net28,068 — 28,068 
Prepaid expenses and other assets5,241 — 5,241 
Property and equipment, net28,661 — 28,661 
Intangibles, net589,800 — 589,800 
Liabilities
Accounts Payable7,197 — 7,197 
Accrued expenses41,654 2,038 43,692 
Deferred revenue, current portion2,509 — 2,509 
Deferred revenue, net of current portion1,207 — 1,207 
Deferred tax liabilities, net71,002 5,534 76,536 
Other long-term liabilities20,788 — 20,788 
Net assets acquired, excluding goodwill590,071 (7,772)582,299 
Goodwill$409,049 $7,772 $416,821 
Schedule of Acquired Finite-Lived Intangible Assets by Major Class Useful lives and final values are presented in the table below.
Amount (in thousands)Useful life (years)
Auto-Injector technology platform$402,000 7
XYOSTED proprietary product136,200 10
TLANDO product rights2,900 10
ATRS-1902 (IPR&D)48,700 Indefinite
Fair value of intangible assets acquired$589,800 
Schedule of Acquired Indefinite-lived Intangible Assets by Major Class Useful lives and final values are presented in the table below.
Amount (in thousands)Useful life (years)
Auto-Injector technology platform$402,000 7
XYOSTED proprietary product136,200 10
TLANDO product rights2,900 10
ATRS-1902 (IPR&D)48,700 Indefinite
Fair value of intangible assets acquired$589,800 
Business Acquisition, Pro Forma Information (unaudited)
The following unaudited pro forma financial information summarizes combined results of operations of Halozyme and Antares as if the companies had been combined as of the beginning of our fiscal year 2021 (in thousands).
Twelve Months Ended December 31,
20222021
Total revenues
$712,683 $627,292 
Net income218,723 295,634 
v3.24.0.1
Fair Value Measurement (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of available-for-sale marketable securities
Available-for-sale marketable securities consisted of the following (in thousands):
December 31, 2023
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Asset-backed securities$3,512 $— $(8)$3,504 
Corporate debt securities6,022 (10)6,013 
U.S. treasury securities
175,996 200 (12)176,184 
Agency bonds16,119 — (16)16,103 
Commercial paper15,826 — — 15,826 
Total marketable securities, available-for-sale$217,475 $201 $(46)$217,630 
December 31, 2022
Amortized CostGross Unrealized GainsGross Unrealized LossesEstimated Fair Value
Asset-backed securities$1,146 $— $— $1,146 
Corporate debt securities7,139 — (9)7,130 
U.S. treasury securities
111,469 — (934)110,535 
Agency bonds2,783 (1)2,784 
Commercial paper7,004 — — 7,004 
Total marketable securities, available-for-sale$129,541 $$(944)$128,599 
Schedule of contractual maturities of available-for-sale debt securities
The estimated fair value of our contractual maturities of available-for-sale debt securities were as follows (in thousands):
December 31, 2023December 31, 2022
Due within one year$197,633 $114,353 
Due after one year but within five years
19,997 14,246 
Total estimated fair value of contractual maturities, available-for-sale$217,630 $128,599 
Schedule of assets measured at fair value on a recurring basis
The following table summarizes, by major security type, our cash equivalents and available-for-sale marketable securities measured at fair value on a recurring basis and are categorized using the fair value hierarchy (in thousands):
December 31, 2023December 31, 2022
Level 1Level 2Total estimated fair valueLevel 1Level 2Total estimated fair value
Assets
Cash equivalents
Money market funds$22,142 $— $22,142 $191,704 $— $191,704 
U.S. treasury securities
2,000 — 2,000 — — — 
Corporate debt securities— — — — — — 
Available-for-sale marketable
securities
Asset-backed securities— 3,504 3,504 — 1,146 1,146 
Corporate debt securities— 6,013 6,013 — 7,130 7,130 
U.S. treasury securities
176,184 — 176,184 110,535 — 110,535 
Agency bonds16,103 — 16,103 2,784 2,784 
Commercial paper— 15,826 15,826 — 7,004 7,004 
Total assets$216,429 $25,343 $241,772 $305,023 $15,280 $320,303 
Liabilities
Derivative instruments
Currency hedging contracts(1)
$— $9,480 $— $— $— $— 
(1) Based on observable market transactions of spot currency rates, forward currency rates or equivalently-termed instruments. Carrying amounts of the financial assets and liabilities are equal to the fair value. As of December 31, 2023, the derivative liabilities recorded within accrued expenses and other long-term liabilities were $2.9 million and $6.6 million, respectively.
v3.24.0.1
Revenue (Tables)
12 Months Ended
Dec. 31, 2023
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
Our disaggregated revenues were as follows (in thousands):
Year Ended December 31,
202320222021
Royalties$447,865 $360,475 $203,900 
Product sales, net
Sales of bulk rHuPH20
115,442 82,084 80,960 
Sale of proprietary products130,834 72,849 23,264 
Sale of device partnered products
54,578 36,097 — 
Total product sales, net300,854 191,030 104,224 
Revenues under collaborative agreements:
Upfront license and target nomination fees
2,000 30,000 42,000 
Event-based development and regulatory milestones and other fees
69,000 59,000 42,000 
Sales-based milestones
— 10,000 50,000 
Device licensing and development revenue
9,534 9,611 1,186 
Total revenues under collaborative agreements80,534 108,611 135,186 
Total revenues
$829,253 $660,116 $443,310 
Contract with Customer, Asset and Liability
Accounts receivable, other contract assets and deferred revenues (contract liabilities) from contracts with customers, including partners, consisted of the following (in thousands):
December 31, 2023December 31, 2022
Accounts receivable, net$233,254 $186,970 
Other contract assets956 44,102 
Deferred revenues4,048 — 
v3.24.0.1
Certain Balance Sheet Items (Tables)
12 Months Ended
Dec. 31, 2023
Balance Sheet Related Disclosures [Abstract]  
Summary of Accounts Receivable
Accounts receivable, net and contract assets consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Accounts receivable from product sales to partners$58,588 $62,979 
Accounts receivable from revenues under collaborative agreements16,183 18,776 
Accounts receivable from royalty payments118,170 100,900 
Accounts receivable from other product sales47,060 6,229 
Contract assets956 44,102 
Total accounts receivable and contract assets
240,957 232,986 
Allowance for distribution fees and discounts(6,747)(1,914)
Total accounts receivable, net and contract assets
$234,210 $231,072 
Summary of Inventories
Inventories consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Raw materials$23,646 $13,792 
Work-in-process34,025 40,361 
Finished goods69,930 45,970 
Total inventories, net
$127,601 $100,123 
Summary of Prepaid Expenses and Other Assets
Prepaid expenses and other assets consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Prepaid manufacturing expenses$36,850 $51,694 
Other prepaid expenses12,902 4,647 
Other assets16,677 14,984 
Total prepaid expenses and other assets
66,429 71,325 
Less: Long-term portion
(17,816)(26,301)
Total prepaid expenses and other assets, current
$48,613 $45,024 
Summary of Property and Equipment
Property and equipment, net consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Research equipment$8,588 $7,380 
Manufacturing equipment32,472 27,893 
Computer and office equipment9,722 7,855 
Leasehold improvements6,987 6,729 
Subtotal
57,769 49,857 
Accumulated depreciation and amortization(19,661)(14,756)
Subtotal38,108 35,101 
Right of use of assets36,836 40,469 
Property and equipment, net
$74,944 $75,570 
Summary of Accrued Expenses
Accrued expenses consisted of the following (in thousands):
December 31,
2023
December 31,
2022
Accrued compensation and payroll taxes$17,361 $19,939 
Accrued outsourced manufacturing expenses12,361 12,190 
Income taxes payable963 — 
Product returns and sales allowance41,932 30,261 
Other accrued expenses33,584 35,270 
Lease liability32,197 34,788 
Total accrued expenses
138,398 132,448 
Less long-term portion(37,720)(32,686)
Total accrued expenses, current
$100,678 $99,762 
v3.24.0.1
Goodwill and Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
A summary of the activity impacting goodwill is presented below (in thousands):
Balance as of December 31, 2022
$409,049 
Measurement period adjustments (1)
7,772 
Balance as of December 31, 2023
$416,821 
(1) Refer to Note 3, Business Combination, for further discussion on the measurement period adjustments.
Schedule of Finite-Lived Intangible Assets Accumulated Amortization and Weighted Average Useful Lives The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of December 31, 2023 (in thousands).
Weighted average useful life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto-Injector technology platform7$402,000 $92,163 $309,837 
XYOSTED proprietary product10136,200 21,858 114,342 
Total finite-lived intangibles, net (1)
$538,200 $114,021 $424,179 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net
$472,879 
(1) An impairment charge of $2.5 million was recognized during the year ended December 31, 2023 resulting in the full impairment of the TLANDO product rights intangible asset. The impairment charge resulted from the notice of termination of the TLANDO license agreement provided to Lipocine in September 2023, effective January 31, 2024, and is included in amortization of intangibles in our consolidated statements of income.
Schedule of Indefinite-Lived Intangible Assets The following table shows the cost, accumulated amortization and weighted average useful life in years for our acquired intangible assets as of December 31, 2023 (in thousands).
Weighted average useful life (in years)
Gross Carrying ValueAccumulated AmortizationNet Carrying Value
Auto-Injector technology platform7$402,000 $92,163 $309,837 
XYOSTED proprietary product10136,200 21,858 114,342 
Total finite-lived intangibles, net (1)
$538,200 $114,021 $424,179 
ATRS-1902 (IPR&D)Indefinite48,700 
Total intangibles, net
$472,879 
(1) An impairment charge of $2.5 million was recognized during the year ended December 31, 2023 resulting in the full impairment of the TLANDO product rights intangible asset. The impairment charge resulted from the notice of termination of the TLANDO license agreement provided to Lipocine in September 2023, effective January 31, 2024, and is included in amortization of intangibles in our consolidated statements of income.
Schedule of Finite-Lived Intangible Assets, Estimated Future Amortization Expense
Estimated future annual amortization of finite-lived intangible assets is shown in the following table (in thousands). Actual amortization expense to be reported in future periods could differ from these estimates as a result of acquisitions, divestitures, and asset impairments, among other factors.
Year
Amortization Expense
2024$71,049 
202571,049 
202671,049 
202771,049 
202871,049 
Thereafter68,934 
Total$424,179 
v3.24.0.1
Long-Term Debt, Net (Tables)
12 Months Ended
Dec. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Carrying Values and Fair Values of Convertible Notes
The carrying amount and fair value of our Convertible Notes were as follows (in thousands).
December 31,
2023
December 31,
2022
Principal amount
2024 Convertible Notes$— $13,483 
2027 Convertible Notes805,000 805,000 
2028 Convertible Notes720,000 720,000 
Total principal amount
$1,525,000 $1,538,483 
Unamortized debt discount
2024 Convertible Notes$— $(149)
2027 Convertible Notes(10,950)(14,359)
2028 Convertible Notes(14,802)(17,875)
Total unamortized debt discount$(25,752)$(32,383)
Carrying amount
2024 Convertible Notes$— $13,334 
2027 Convertible Notes794,050 790,641 
2028 Convertible Notes705,198 702,125 
Total carrying amount$1,499,248 $1,506,100 
Fair value based on trading levels (Level 2)
2024 Convertible Notes$— $32,176 
2027 Convertible Notes695,826 784,770 
2028 Convertible Notes670,522 849,823 
Total fair value of outstanding notes$1,366,348 $1,666,769 
Remaining amortization per period of debt discount (in years)
2024 Convertible Notes— 1.9
2027 Convertible Notes3.24.2
2028 Convertible Notes4.65.6
Components of Interest Expense and the Effective Interest Rates
The following table summarizes the components of interest expense and the effective interest rates for each of our Convertible Notes (in thousands).
Twelve Months Ended December 31,
202320222021
Coupon interest
2024 Convertible Notes$36 $771 $1,906 
2027 Convertible Notes2,013 2,013 1,677 
2028 Convertible Notes7,200 2,660 — 
Total coupon interest
$9,249 $5,444 $3,583 
Amortization of debt discount
2024 Convertible Notes$24 $357 $838 
2027 Convertible Notes3,409 3,386 2,804 
2028 Convertible Notes3,073 1,124 — 
Total amortization of debt discount$6,506 $4,867 $3,642 
Interest expense
2024 Convertible Notes$60 $1,128 $2,744 
2027 Convertible Notes5,422 5,399 4,481 
2028 Convertible Notes10,273 3,784 — 
Total interest expense$15,755 $10,311 $7,225 
Effective interest rates
2024 Convertible Notes— 1.8 %1.8 %
2027 Convertible Notes0.7 %0.7 %0.7 %
2028 Convertible Notes1.5 %1.5 %n/a
Future Maturities Interest Payments of Long-term Debt
Future maturities and interest payments of long-term debt as of December 31, 2023, are as follows (in thousands):
2024$9,213 
20259,213 
20269,213 
2027812,535 
2028724,480 
Thereafter— 
Total minimum payments1,564,654 
Less amount representing coupon interest(39,654)
Gross balance of long-term debt1,525,000 
Less unamortized debt discount(25,752)
Carrying value of long-term debt1,499,248 
Less current portion of long-term debt— 
Long-term debt, less current portion and unamortized debt discount$1,499,248 
v3.24.0.1
Share-based Compensation (Tables)
12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Share-based Compensation Expense Related To Share-based Payment Awards Excluding Acceleration of Antares Equity Awards
Total share-based compensation expense related to share-based awards was comprised of the following (in thousands):
Year Ended December 31,
 202320222021
Research and development$13,345 $9,903 $6,992 
Selling, general and administrative23,275 14,494 13,828 
Total share-based compensation expense
$36,620 $24,397 $20,820 
Share-based Compensation Expense By Type
Share-based compensation expense by type of share-based award (in thousands):
Year Ended December 31,
 202320222021
Stock options$16,351 $10,973 $10,252 
RSAs, RSUs, PSUs and ESPP20,269 13,424 10,568 
Total share-based compensation expense
$36,620 $24,397 $20,820 
Total Unrecognized Estimated Compensation Cost By Type Of Award and Weighted Average Remaining Requisite Service Period
Total unrecognized estimated compensation cost by type of award and the weighted-average remaining requisite service period over which such expense is expected to be recognized as of December 31, 2023 (in thousands, unless otherwise noted):
December 31, 2023
 Unrecognized
Expense
Remaining
Weighted-Average
Recognition Period
( in years)
Stock options$39,841 2.68
RSUs33,566 2.34
PSUs6,110 1.43
ESPP262 0.45
Summary of Stock Option Award Activity
A summary of our stock option award activity as of and for the year ended December 31, 2023 is as follows: 
Shares
Underlying
Stock Options
Weighted
Average Exercise
Price per Share
Weighted
Average
Remaining
Contractual
Term ( in years)
Aggregate
Intrinsic
Value (in millions)
Outstanding as of December 31, 2022
5,368,225 $24.99 
Granted1,979,286 43.93 
Exercised(565,343)17.70 
Canceled/forfeited(359,331)42.33 
Outstanding as of December 31, 2023
6,422,837 30.50 6.64$64.0 
Vested and expected to vest as of December 31, 2023
6,422,837 30.50 6.6464.0 
Exercisable as of December 31, 2023
3,620,251 $21.67 4.96$60.0 
Schedule of Valuation Assumptions The assumptions used in the Black-Scholes Model were as follows:
Year Ended December 31,
 202320222021
Expected volatility
39.68 - 40.82%
39.91 - 50.81%
41.01 - 46.45%
Average expected term (in years)4.84.74.7
Risk-free interest rate
3.37 - 4.72%
1.37 - 4.27%
0.36 - 1.20%
Expected dividend yield— — — 
Summary of RSU Activity
The following table summarizes our RSU activity during the year ended December 31, 2023:
Number of
Shares
Weighted
Average
Grant Date
Fair Value
Weighted
Average
Remaining
Contractual
Term (in years)
Aggregate
Intrinsic
Value (in millions)
Outstanding as of December 31, 2022
1,039,381 $35.76 
Granted646,793 45.16 
Vested(400,309)32.11 
Forfeited(146,529)43.50 
Outstanding as of December 31, 2023
1,139,336 $41.38 1.27$42.1 
Schedule of PSU Activity
The following table summarizes our PSU activity during the year ended December 31, 2023:
Number of
Shares
Weighted
Average
Grant Date
Fair Value
Outstanding as of December 31, 2022
142,844 $46.01 
Granted106,174 59.34 
Vested(3,803)49.35 
Forfeited(2,660)52.79 
Outstanding as of December 31, 2023
242,555 $51.72 
v3.24.0.1
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2023
Equity [Abstract]  
Schedule of Activity under Approved Share Repurchase Programs
We had the following activity under the approved share repurchase programs (dollars in thousands, except share and per share data)
2023
Total Number of Shares Purchased
Weighted Average Price Paid Per Share
Total Cost (1)
First quarter4,165,258 $36.01 $150,083 
Second quarter— — — 
Third quarter
— — — 
Fourth quarter— — — 
4,165,258 36.01 $150,083 
Accelerated share repurchase (2)
5,452,563 $— $250,000 

(1)Included in the total cost of shares purchased is a commission fee of $0.02 per share.
(2)Purchased through an ASR agreement executed to repurchase $250.0 million of common stock. In November 2023, we took initial delivery of 5.5 million shares in accordance with the ASR. Final shares will be delivered on or before June 10, 2024.
v3.24.0.1
Earnings per share (Tables)
12 Months Ended
Dec. 31, 2023
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted A reconciliation of the numerators and the denominators of the basic and diluted earnings per share computations is as follows (in thousands, except per share amounts):
Twelve Months Ended December 31,
 202320222021
Numerator
Net income$281,594 $202,129 $402,710 
Denominator
Weighted average common shares outstanding for basic earnings per share
131,927 136,844 140,646 
Dilutive potential common stock outstanding
Stock options
1,824 2,265 2,737 
RSUs, PSUs and ESPP
388 422 555 
Convertible Notes58 1,077 2,858 
Weighted average common shares outstanding for diluted earnings per share
134,197 140,608 146,796 
Earnings per share
Basic$2.13 $1.48 $2.86 
Diluted$2.10 $1.44 $2.74 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share
Shares which have been excluded from the calculation of diluted earnings per common share because their effect was anti-dilutive, include the following (shares in millions):
Twelve Months Ended December 31,
 202320222021
Anti-dilutive securities (1)
27.8 20.7 13.8 
(1) The anti-dilutive securities include outstanding stock options, unvested RSUs, unvested PSUs, common shares expected to be issued under our ESPP and Convertible Notes.
v3.24.0.1
Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Operating Lease Payments
Approximate annual future minimum operating lease payments as of December 31, 2023 are as follows (in thousands): 
Year
Operating
Leases
2024$6,580 
20256,025 
20265,676 
20275,296 
20285,447 
Thereafter11,686 
Total minimum lease payments40,710 
Less imputed interest(8,513)
Total$32,197 
v3.24.0.1
Income Taxes (Tables)
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Income (Loss) Before Income Taxes Summarized By Region
Total income (loss) before income taxes summarized by region was as follows (in thousands):
Year Ended December 31,
202320222021
United States$348,828 $248,918 $248,071 
Foreign(499)— 447 
Net income before income taxes$348,329 $248,918 $248,518 
Schedule of Components of Deferred Tax Assets and Liabilities
Significant components of our net deferred tax assets (liabilities) were as follows (in thousands).
December 31,
20232022
Deferred tax assets
Net operating loss carryforwards$32,753 $32,887 
Deferred revenue31 837 
Research and development and orphan drug credits38,192 96,133 
Share-based compensation5,024 6,353 
ASC 842 lease liability7,258 2,480 
Capitalized research expense19,543 10,168 
Transaction related expense— 2,354 
Inventory related reserves13,561 18,395 
Other, net6,715 3,054 
Total deferred tax assets
123,077 172,661 
Valuation allowance for deferred tax assets(2,588)(707)
Deferred tax assets, net of valuation allowance120,489 171,954 
Deferred tax liabilities
Non-deductible book amortization (103,492)(115,578)
Depreciation(3,522)(2,559)
ASC 842 right of use asset(8,259)(9,061)
Other, net(830)(330)
Total deferred tax liabilities(116,103)(127,528)
Net deferred tax asset $4,386 $44,426 
Schedule of Components of Income Tax Expense (Benefit)
Income tax expense (benefit) was comprised of the following components (in thousands):
Year Ended December 31,
202320222021
Current - federal$24,963 $6,157 $(9)
Current - state5,717 2,525 1,251 
Deferred - federal34,037 44,757 (117,925)
Deferred - state2,018 (6,650)(37,509)
Total income tax expense (benefit)
$66,735 $46,789 $(154,192)
Schedule of Reconciliation of Provision for Income Taxes to Federal Income Tax Rate
The provision for income taxes on earnings subject to income taxes differs from the statutory federal income tax rate due to the following:
Year Ended December 31,
202320222021
Federal income tax expense
21.00 %21.00 %21.00 %
State income tax expense, net of federal income tax impact
2.76 %0.82 %2.67 %
Decrease in valuation allowance
— %(0.39)%(84.92)%
Foreign income subject to tax at other than federal statutory rate0.03 %— %0.02 %
Share-based compensation(0.21)%(0.66)%(2.50)%
Executive compensation limitation0.90 %2.61 %2.32 %
Non-deductible expenses and other0.80 %(0.40)%0.54 %
Foreign-derived intangible income(3.44)%(5.06)%(1.18)%
Transaction costs— %0.88 %— %
Research and development credits, net(2.71)%— %— %
Effective income tax rate
19.13 %18.80 %(62.05)%
Summary of Change in Unrecognized Tax Benefits
The following table summarizes the activity related to our unrecognized tax benefits (in thousands):
Year Ended December 31,
202320222021
Gross unrecognized tax benefits, beginning of period
$19,482 $17,692 $19,167 
Increases in tax positions for prior years1,645 — 21 
Decreases in tax positions for prior years and lapse in statute of limitations
— (1,148)(1,496)
Increases in tax positions related to business acquisition— 2,151 — 
Increases in tax positions for current year 791 787 — 
Gross unrecognized tax benefits, end of period$21,918 $19,482 $17,692 
v3.24.0.1
Organization and Business (Details)
12 Months Ended
Dec. 31, 2023
collaborator
product
Takeda  
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Number of products royalties received from sales | product 1
Roche  
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Number of collaborations royalties from which royalties are received 4
Janssen  
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Number of collaborations royalties from which royalties are received 1
Argenx  
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]  
Number of collaborations royalties from which royalties are received 1
v3.24.0.1
Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Restricted Cash and Investments, Current [Abstract]    
Restricted cash $ 0 $ 500,000
v3.24.0.1
Summary of Significant Accounting Policies - Concentrations of Credit Risk (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
financialInstitution
bank
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Concentration Risk [Line Items]      
Commercial banks where cash and cash equivalents are maintained | bank 2    
Financial institutions where marketable securities are maintained | financialInstitution 1    
Accounts receivable, allowance for credit loss $ 0 $ 0  
Total revenues 829,253,000 660,116,000 $ 443,310,000
Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues 829,253,000 660,116,000 443,310,000
United States | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues 587,196,000 437,989,000 293,089,000
Switzerland | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues 149,024,000 166,836,000 134,117,000
Belgium | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues 58,354,000 2,088,000 199,000
Japan | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues 15,096,000 47,939,000 11,934,000
All other foreign | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Total revenues $ 19,583,000 $ 5,264,000 $ 3,971,000
Jansen and Roche | Accounts Receivable | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage (instant date) 69.00%    
Janssen, Roche and Takeda | Accounts Receivable | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage (instant date)   52.00%  
Partner A | Sales | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage 44.00% 46.00% 48.00%
Partner B | Sales | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage 19.00% 20.00% 25.00%
Partner C | Sales | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage 10.00% 0.00% 0.00%
Partner D | Sales | Customer Concentration Risk      
Concentration Risk [Line Items]      
Concentration risk, percentage 0.00% 0.00% 10.00%
v3.24.0.1
Summary of Significant Accounting Policies - Accounts Receivable (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Accounting Policies [Abstract]    
Accounts receivable, allowance for credit loss $ 0 $ 0
v3.24.0.1
Summary of Significant Accounting Policies - Leases (Details)
Dec. 31, 2023
Minimum  
Operating lease, term of contract 3 years
Maximum  
Operating lease, term of contract 12 years
v3.24.0.1
Summary of Significant Accounting Policies - Property and Equipment (Details)
Dec. 31, 2023
Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful lives (years) 3 years
Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment, useful lives (years) 10 years
v3.24.0.1
Summary of Significant Accounting Policies - Cash Flow Hedges, Currency Risk (Details)
12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]  
Cash flow hedge program, hedge of forecasted royalties, maximum future period 4 years
v3.24.0.1
Summary of Significant Accounting Policies - Segment information (Details)
12 Months Ended
Dec. 31, 2023
segment
Segment Reporting [Abstract]  
Number of operating segments 1
v3.24.0.1
Business Combination - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
6 Months Ended 12 Months Ended
May 24, 2022
Jun. 30, 2023
Dec. 31, 2022
Business Acquisition [Line Items]      
Adjustment, accounts receivable, net   $ 200  
Antares Pharma, Inc      
Business Acquisition [Line Items]      
Purchase consideration $ 1,045,668    
Consideration transferred, cash paid per acquiree share (in usd per share) $ 5.60    
Consideration related toacquiree closing indebtedness settled $ 19,683    
Consideration for seller transaction costs paid by Halozyme 22,906    
Transaction costs     $ 21,900
Adjustment, accrued expenses   2,038  
Adjustments, deferred tax liabilities, net   5,534  
Adjustment, accounts receivable, net   $ 200  
Pro forma revenue of acquiree since acquisition date     112,700
Proforma net loss of acquiree since acquisition date     $ 67,600
Antares Pharma, Inc | Revolving Credit Facility      
Business Acquisition [Line Items]      
Credit facility, maximum borrowing capacity 350,000    
Antares Pharma, Inc | Term Loan Facility      
Business Acquisition [Line Items]      
Credit facility, maximum borrowing capacity $ 250,000    
v3.24.0.1
Business Combination - Purchase Consideration (Details) - USD ($)
$ in Thousands
12 Months Ended
May 24, 2022
Dec. 31, 2022
Business Acquisition [Line Items]    
Share-based compensation expense   $ 8,700
Antares Pharma, Inc    
Business Acquisition [Line Items]    
Cash consideration for Antares shares outstanding as of May 24, 2022 $ 956,886  
Consideration for Antares equity compensation awards 45,828  
Consideration for seller transaction costs paid by Halozyme 22,906  
Consideration related to Antares closing indebtedness settled by Halozyme 19,683  
Cash consideration related to cash bonus awards paid by Halozyme 365  
Purchase consideration 1,045,668  
Antares Pharma, Inc | Equity Compensation Awards, Vested    
Business Acquisition [Line Items]    
Consideration for Antares equity compensation awards 32,200  
Antares Pharma, Inc | Equity Compensation Awards, Unvested    
Business Acquisition [Line Items]    
Consideration for Antares equity compensation awards $ 13,600  
v3.24.0.1
Business Combination - Schedule of Assets Acquired and Liabilities Assumed (Details) - USD ($)
$ in Thousands
6 Months Ended 7 Months Ended 12 Months Ended
May 24, 2022
Jun. 30, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]            
Total purchase consideration, net of $46,548 cash acquired       $ 0 $ 999,120 $ 0
Liabilities            
Goodwill     $ 409,049 416,821 409,049  
Measurement period adjustment            
Accounts receivable, net   $ (200)        
Goodwill       7,772    
Antares Pharma, Inc            
Business Acquisition [Line Items]            
Cash acquired $ 46,548          
Total purchase consideration, net of $46,548 cash acquired     999,120 999,120    
Assets:            
Short-term investments     498 498 498  
Accounts receivable, net     82,160 81,960 82,160  
Inventories, net     28,068 28,068 28,068  
Prepaid expenses and other assets     5,241 5,241 5,241  
Prepaid expenses and other assets     28,661 28,661 28,661  
Intangibles, net     589,800 589,800 589,800  
Liabilities            
Accounts Payable     7,197 7,197 7,197  
Accrued expenses     41,654 43,692 41,654  
Deferred revenue, current portion     2,509 2,509 2,509  
Deferred revenue, net of current portion     1,207 1,207 1,207  
Deferred tax liabilities, net     71,002 76,536 71,002  
Other long-term liabilities     20,788 20,788 20,788  
Net assets acquired, excluding goodwill     590,071 582,299 590,071  
Goodwill     $ 409,049 $ 416,821 $ 409,049  
Measurement period adjustment            
Accounts receivable, net   (200)        
Accrued expenses   2,038        
Deferred tax liabilities, net   5,534        
Other long-term liabilities   0        
Net assets acquired, excluding goodwill   (7,772)        
Goodwill   $ 7,772        
v3.24.0.1
Business Combination - Intangible Assets Acquired (Details) - Antares Pharma, Inc - USD ($)
$ in Thousands
7 Months Ended
Dec. 31, 2022
Dec. 31, 2023
Business Acquisition [Line Items]    
Fair value of intangible assets acquired $ 589,800 $ 589,800
ATRS-1902 (IPR&D)    
Business Acquisition [Line Items]    
Indefinite-lived intangible assets acquired 48,700  
Auto-Injector technology platform    
Business Acquisition [Line Items]    
Finite-lived intangible assets acquired 402,000  
Useful life (years)   7 years
XYOSTED proprietary product    
Business Acquisition [Line Items]    
Finite-lived intangible assets acquired 136,200  
Useful life (years)   10 years
TLANDO product rights    
Business Acquisition [Line Items]    
Finite-lived intangible assets acquired $ 2,900  
Useful life (years)   10 years
v3.24.0.1
Business Combination - Summary of Proforma Financial Information (Details) - Antares Pharma, Inc - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Business Acquisition [Line Items]    
Total revenues $ 712,683 $ 627,292
Net income $ 218,723 $ 295,634
v3.24.0.1
Fair Value Measurement - Summary of Available-for-Sale Securities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Schedule of Available-for-sale Securities    
Amortized Cost $ 217,475 $ 129,541
Gross Unrealized Gains 201 2
Gross Unrealized Losses (46) (944)
Estimated Fair Value 217,630 128,599
Asset-backed securities    
Schedule of Available-for-sale Securities    
Amortized Cost 3,512 1,146
Gross Unrealized Gains 0 0
Gross Unrealized Losses (8) 0
Estimated Fair Value 3,504 1,146
Corporate debt securities    
Schedule of Available-for-sale Securities    
Amortized Cost 6,022 7,139
Gross Unrealized Gains 1 0
Gross Unrealized Losses (10) (9)
Estimated Fair Value 6,013 7,130
U.S. treasury securities    
Schedule of Available-for-sale Securities    
Amortized Cost 175,996 111,469
Gross Unrealized Gains 200 0
Gross Unrealized Losses (12) (934)
Estimated Fair Value 176,184 110,535
Agency bonds    
Schedule of Available-for-sale Securities    
Amortized Cost 16,119 2,783
Gross Unrealized Gains 0 2
Gross Unrealized Losses (16) (1)
Estimated Fair Value 16,103 2,784
Commercial paper    
Schedule of Available-for-sale Securities    
Amortized Cost 15,826 7,004
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Estimated Fair Value $ 15,826 $ 7,004
v3.24.0.1
Fair Value Measurement - Narrative (Details)
12 Months Ended
Dec. 31, 2023
USD ($)
security
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Number of securities in unrealized loss position | security 20    
Securities in continuous unrealized loss position, less than 12 months $ 29,100,000    
Securities in continuous unrealized loss position, less than 12 months, accumulated loss 46,300    
Available-for-sale marketable securities 217,630,000 $ 128,599,000  
Contingent liability fair value measurement gain 13,200,000 0 $ 0
Antares Pharma, Inc      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Contingent liability fair value measurement gain 13,200,000    
Level 3      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Available-for-sale marketable securities $ 0 $ 0  
v3.24.0.1
Fair Value Measurement - Maturities (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Fair Value Disclosures [Abstract]    
Due within one year $ 197,633 $ 114,353
Due after one year but within five years 19,997 14,246
Estimated Fair Value $ 217,630 $ 128,599
v3.24.0.1
Fair Value Measurement - Summary by Major Security of Fair Value Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Assets    
Available-for-sale marketable securities $ 217,630 $ 128,599
Total assets 241,772 320,303
Liabilities    
Derivative Liability, current 2,900  
Derivative liability, noncurrent $ 6,600  
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration] Total accrued expenses, current  
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other long-term liabilities  
Currency hedging contract    
Liabilities    
Derivative instruments $ 0 0
Level 1    
Assets    
Total assets 216,429 305,023
Level 1 | Currency hedging contract    
Liabilities    
Derivative instruments 0 0
Level 2    
Assets    
Total assets 25,343 15,280
Level 2 | Currency hedging contract    
Liabilities    
Derivative instruments 9,480 0
Asset-backed securities    
Assets    
Available-for-sale marketable securities 3,504 1,146
Asset-backed securities | Level 1    
Assets    
Available-for-sale marketable securities 0 0
Asset-backed securities | Level 2    
Assets    
Available-for-sale marketable securities 3,504 1,146
Corporate debt securities    
Assets    
Available-for-sale marketable securities 6,013 7,130
Corporate debt securities | Level 1    
Assets    
Available-for-sale marketable securities 0 0
Corporate debt securities | Level 2    
Assets    
Available-for-sale marketable securities 6,013 7,130
U.S. treasury securities    
Assets    
Available-for-sale marketable securities 176,184 110,535
U.S. treasury securities | Level 1    
Assets    
Available-for-sale marketable securities 176,184 110,535
U.S. treasury securities | Level 2    
Assets    
Available-for-sale marketable securities 0 0
Agency bonds    
Assets    
Available-for-sale marketable securities 16,103 2,784
Agency bonds | Level 1    
Assets    
Available-for-sale marketable securities 16,103 2,784
Agency bonds | Level 2    
Assets    
Available-for-sale marketable securities 0  
Commercial paper    
Assets    
Available-for-sale marketable securities 15,826 7,004
Commercial paper | Level 1    
Assets    
Available-for-sale marketable securities 0 0
Commercial paper | Level 2    
Assets    
Available-for-sale marketable securities 15,826 7,004
Money market funds    
Assets    
Cash Equivalents 22,142 191,704
Money market funds | Level 1    
Assets    
Cash Equivalents 22,142 191,704
Money market funds | Level 2    
Assets    
Cash Equivalents 0 0
U.S. treasury securities    
Assets    
Cash Equivalents 2,000 0
U.S. treasury securities | Level 1    
Assets    
Cash Equivalents 2,000 0
U.S. treasury securities | Level 2    
Assets    
Cash Equivalents 0 0
Corporate debt securities    
Assets    
Cash Equivalents 0 0
Corporate debt securities | Level 1    
Assets    
Cash Equivalents 0 0
Corporate debt securities | Level 2    
Assets    
Cash Equivalents $ 0 $ 0
v3.24.0.1
Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Total revenues $ 829,253 $ 660,116 $ 443,310
Royalties      
Disaggregation of Revenue [Line Items]      
Total revenues 447,865 360,475 203,900
Product sales, net      
Disaggregation of Revenue [Line Items]      
Total revenues 300,854 191,030 104,224
Sales of bulk rHuPH20      
Disaggregation of Revenue [Line Items]      
Total revenues 115,442 82,084 80,960
Sale of proprietary products      
Disaggregation of Revenue [Line Items]      
Total revenues 130,834 72,849 23,264
Sale of device partnered products      
Disaggregation of Revenue [Line Items]      
Total revenues 54,578 36,097 0
Revenues under collaborative agreements      
Disaggregation of Revenue [Line Items]      
Total revenues 80,534 108,611 135,186
Upfront license and target nomination fees      
Disaggregation of Revenue [Line Items]      
Total revenues 2,000 30,000 42,000
Event-based development and regulatory milestones and other fees      
Disaggregation of Revenue [Line Items]      
Total revenues 69,000 59,000 42,000
Sales-based milestones      
Disaggregation of Revenue [Line Items]      
Total revenues 0 10,000 50,000
Device licensing and development revenue      
Disaggregation of Revenue [Line Items]      
Total revenues $ 9,534 $ 9,611 $ 1,186
v3.24.0.1
Revenue - Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disaggregation of Revenue [Line Items]      
Revenue recognized variable consideration and other uncertainties satisfied $ 69,000    
Revenue recognized previously included in deferred revenue 0 $ (2,494) $ (1,496)
Deferred revenues 4,048 $ 0  
Contract assets 1,000    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01      
Disaggregation of Revenue [Line Items]      
Revenue, remaining performance obligation $ 600    
Deferred revenue, remaining performance obligation, expected timing 12 months    
Other collaborators      
Disaggregation of Revenue [Line Items]      
Deferred revenues $ 80,800    
License fees and event-based payments      
Disaggregation of Revenue [Line Items]      
Revenue recognized from prior periods 516,900    
Revenue recognized previously included in deferred revenue 3,200    
Product sales, net      
Disaggregation of Revenue [Line Items]      
Revenue remaining performance obligations, related to unfulfilled product purchase orders $ 76,800    
v3.24.0.1
Revenue - Contract with Customer, Asset and Liability (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Revenue from Contract with Customer [Abstract]    
Accounts receivable, net $ 233,254 $ 186,970
Contract assets 1,000  
Deferred revenues $ 4,048 $ 0
v3.24.0.1
Certain Balance Sheet Items - Accounts Receivable, Net and Contract Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Contract assets $ 956 $ 44,102
Total accounts receivable and contract assets 240,957 232,986
Allowance for distribution fees and discounts (6,747) (1,914)
Total accounts receivable, net and contract assets 234,210 231,072
Sale of device partnered products    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable 58,588 62,979
Revenues under collaborative agreements    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable 16,183 18,776
Royalties    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable 118,170 100,900
Other product sales    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable $ 47,060 $ 6,229
v3.24.0.1
Certain Balance Sheet Items - Inventories (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Inventory Disclosure [Abstract]    
Raw materials $ 23,646 $ 13,792
Work-in-process 34,025 40,361
Finished goods 69,930 45,970
Total inventories, net $ 127,601 $ 100,123
v3.24.0.1
Certain Balance Sheet Items - Prepaid Expenses and Other Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid manufacturing expenses $ 36,850 $ 51,694
Other prepaid expenses 12,902 4,647
Other assets 16,677 14,984
Total prepaid expenses and other assets 66,429 71,325
Less: Long-term portion (17,816) (26,301)
Total prepaid expenses and other assets, current $ 48,613 $ 45,024
v3.24.0.1
Certain Balance Sheet Items - Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Property and equipment, gross $ 57,769 $ 49,857
Accumulated depreciation and amortization (19,661) (14,756)
Subtotal 38,108 35,101
Right of use of assets 36,836 40,469
Property and equipment, net $ 74,944 $ 75,570
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property and equipment, net Property and equipment, net
Research equipment    
Property and equipment, gross $ 8,588 $ 7,380
Manufacturing equipment    
Property and equipment, gross 32,472 27,893
Computer and office equipment    
Property and equipment, gross 9,722 7,855
Leasehold improvements    
Property and equipment, gross $ 6,987 $ 6,729
v3.24.0.1
Certain Balance Sheet Items - Property and Equipment, Net Narrative (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Depreciation and amortization      
Depreciation and amortization $ 11,083 $ 6,493 $ 2,997
ROU amortization $ 5,500 $ 3,000 $ 1,600
v3.24.0.1
Certain Balance Sheet Items - Accrued Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Summary of Accrued Expenses      
Accrued compensation and payroll taxes $ 17,361 $ 19,939  
Accrued outsourced manufacturing expenses 12,361 12,190  
Income taxes payable 963 0  
Product returns and sales allowance 41,932 30,261  
Other accrued expenses 33,584 35,270  
Lease liability 32,197 34,788  
Total accrued expenses 138,398 132,448  
Less long-term portion (37,720) (32,686)  
Total accrued expenses, current $ 100,678 $ 99,762  
Operating Lease, Liability, Statement of Financial Position [Extensible List] Total accrued expenses, current Total accrued expenses, current  
Operating lease, accretion of liability $ 2,500 $ 500 $ 300
Operating lease, cost 8,000 3,300 1,900
Operating lease payments $ 6,700 $ 4,200 $ 2,700
v3.24.0.1
Goodwill and Intangible Assets - Goodwill Rollforward (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
Goodwill [Roll Forward]  
Goodwill, Beginning Balance $ 409,049
Measurement period adjustment 7,772
Goodwill, Ending Balance $ 416,821
v3.24.0.1
Goodwill and Intangible Assets - Additional Information (Details)
12 Months Ended
Dec. 31, 2023
Minimum  
Goodwill [Line Items]  
Weighted average useful life (in years) 7 years
Maximum  
Goodwill [Line Items]  
Weighted average useful life (in years) 10 years
v3.24.0.1
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 538,200  
Accumulated Amortization 114,021  
Net Carrying Value - finite intangible assets 424,179  
ATRS-1902 (IPR&D) - indefinite 48,700  
Total intangibles, net $ 472,879 $ 546,652
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] Amortization of intangible assets  
Auto-Injector technology platform    
Finite-Lived Intangible Assets [Line Items]    
Weighted average useful life (in years) 7 years  
Gross Carrying Value $ 402,000  
Accumulated Amortization 92,163  
Net Carrying Value - finite intangible assets $ 309,837  
XYOSTED proprietary product    
Finite-Lived Intangible Assets [Line Items]    
Weighted average useful life (in years) 10 years  
Gross Carrying Value $ 136,200  
Accumulated Amortization 21,858  
Net Carrying Value - finite intangible assets 114,342  
TLANDO product rights    
Finite-Lived Intangible Assets [Line Items]    
Impairment charge $ 2,500  
v3.24.0.1
Goodwill and Intangible Assets - Future Amortization (Details)
$ in Thousands
Dec. 31, 2023
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2024 $ 71,049
2025 71,049
2026 71,049
2027 71,049
2028 71,049
Thereafter 68,934
Total $ 424,179
v3.24.0.1
Long-Term Debt, Net - Narrative (Details)
1 Months Ended 12 Months Ended
Jan. 31, 2023
USD ($)
shares
Aug. 31, 2022
USD ($)
trading_day
businessDay
$ / shares
shares
May 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
trading_day
collaborator
$ / shares
shares
Jan. 31, 2021
$ / shares
Nov. 30, 2019
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Aug. 15, 2022
$ / shares
Debt Instrument [Line Items]                    
Aggregate principal             $ 1,525,000,000 $ 1,538,483,000    
Proceeds from issuance of 2028 Convertible Notes, net             0 702,000,000 $ 0  
Debt issuance costs             0 7,104,000 424,000  
Payment for capped calls   $ 69,100,000                
Repayment of 2024 Convertible Notes   77,400,000         13,483,000 77,453,000 369,064,000  
Amount paid for conversion of debt instrument $ 13,500,000 $ 77,600,000                
Stock issued for conversion of debt instrument (shares) | shares 288,886 1,510,000                
Induced conversion expense related to convertible notes   $ 2,700,000         0 2,712,000 20,960,000  
Proceeds from revolving credit facilities             0 120,000,000 $ 0  
1.00% Convertible Senior Notes due 2028                    
Debt Instrument [Line Items]                    
Aggregate principal             720,000,000 720,000,000    
Proceeds from issuance of 2028 Convertible Notes, net   $ 702,000,000                
Cap call transaction, cap price per share (in usd per share) | $ / shares   $ 75.4075                
Sale of stock premium over last reported sale price, percentage   75.00%                
Sale of stock, price per share (in usd per share) | $ / shares                   $ 43.09
1.00% Convertible Senior Notes due 2028 | Convertible Debt                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)   1.00%                
Aggregate principal   $ 720,000,000                
Lender fee   18,000,000                
Debt issuance costs   $ 1,000,000                
Conversion rate (shares)   17.8517                
Debt, convertible, conversion price (in usd per share) | $ / shares   $ 56.02                
1.00% Convertible Senior Notes due 2028 | Period One | Convertible Debt                    
Debt Instrument [Line Items]                    
Convertible, threshold percentage of stock price trigger   130.00%                
Convertible, threshold trading days | trading_day   20                
Convertible, threshold consecutive trading days | trading_day   30                
1.00% Convertible Senior Notes due 2028 | Period Two | Convertible Debt                    
Debt Instrument [Line Items]                    
Convertible, threshold percentage of stock price trigger   98.00%                
Convertible, threshold consecutive trading days | trading_day   5                
Convertible, threshold consecutive business days | businessDay   5                
0.25% Convertible Senior Notes due 2027                    
Debt Instrument [Line Items]                    
Aggregate principal             805,000,000 805,000,000    
Proceeds from issuance of 2028 Convertible Notes, net       $ 784,900,000            
0.25% Convertible Senior Notes due 2027 | Convertible Debt                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)       0.25%            
Aggregate principal       $ 805,000,000            
Lender fee       20,100,000            
Debt issuance costs       $ 400,000            
Conversion rate (shares)       12.9576            
Debt, convertible, conversion price (in usd per share) | $ / shares       $ 77.17            
0.25% Convertible Senior Notes due 2027 | Period One | Convertible Debt                    
Debt Instrument [Line Items]                    
Convertible, threshold percentage of stock price trigger       130.00%            
Convertible, threshold trading days | trading_day       20            
Convertible, threshold consecutive trading days | trading_day       30            
Convertible, threshold consecutive business days | collaborator       5            
0.25% Convertible Senior Notes due 2027 | Period Two | Convertible Debt                    
Debt Instrument [Line Items]                    
Convertible, threshold percentage of stock price trigger       98.00%            
Convertible, threshold consecutive trading days | trading_day       5            
1.25% Convertible Senior Notes due 2024                    
Debt Instrument [Line Items]                    
Aggregate principal             0 $ 13,483,000    
Proceeds from issuance of 2028 Convertible Notes, net           $ 447,300,000        
Repayment of 2024 Convertible Notes       $ 369,100,000            
Amount paid for conversion of debt instrument       $ 370,200,000            
Stock issued for conversion of debt instrument (shares) | shares       9,080,000.00            
Induced conversion expense related to convertible notes       $ 21,000,000            
1.25% Convertible Senior Notes due 2024 | Convertible Debt                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)           1.25%        
Aggregate principal           $ 460,000,000        
Lender fee           12,700,000        
Debt issuance costs           $ 300,000        
Conversion rate (shares)         41.9208          
Debt, convertible, conversion price (in usd per share) | $ / shares         $ 23.85          
Credit Agreement | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Credit facility, maximum borrowing capacity   $ 575,000,000 $ 350,000,000              
Proceeds from revolving credit facilities     $ 120,000,000              
Debt issuance cost             3,600,000      
Credit Agreement | SOFR | Revolving Credit Facility | Variable Rate Component One                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     0.10%              
Credit Agreement | Fed Funds Rate | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     0.50%              
Credit Agreement | Period prior to expiration | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Commitment fee percentage     0.15%              
Credit Agreement | Period prior to expiration | SOFR | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     1.00%              
Credit Agreement | Period prior to expiration | SOFR | Revolving Credit Facility | Variable Rate Component Two                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     1.25%              
Credit Agreement | Period prior to expiration | Base Rate | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     0.25%              
Credit Agreement | Period after expiration | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Commitment fee percentage     0.35%              
Credit Agreement | Period after expiration | SOFR | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     1.10%              
Credit Agreement | Period after expiration | SOFR | Revolving Credit Facility | Variable Rate Component Two                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     2.25%              
Credit Agreement | Period after expiration | Base Rate | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Basis spread on variable rate     1.25%              
Credit Agreement | Term Loan Facility                    
Debt Instrument [Line Items]                    
Credit facility, maximum borrowing capacity     $ 250,000,000              
Proceeds from revolving credit facilities     $ 250,000,000              
Unamortized debt issuance cost             $ 2,300,000      
Credit Agreement | Term Loan Facility | Year one                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)     2.50%              
Credit Agreement | Term Loan Facility | Year two                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)     5.00%              
Credit Agreement | Term Loan Facility | Year three                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)     7.50%              
Credit Agreement | Term Loan Facility | Year four                    
Debt Instrument [Line Items]                    
Stated interest rate (as a percent)     10.00%              
v3.24.0.1
Long-term Debt, Net - Carrying Value of Debt, Components of Interest Expense and Future Maturity (Details) - USD ($)
Dec. 31, 2023
Dec. 31, 2022
Aug. 31, 2022
Mar. 31, 2021
Nov. 30, 2019
Debt Instrument [Line Items]          
Total principal amount $ 1,525,000,000 $ 1,538,483,000      
Total unamortized debt discount 25,752,000 32,383,000      
Current portion of long-term debt, net 0 13,334,000      
Long-term debt, net 1,499,248,000 1,506,100,000      
Long-term debt, net 1,499,248,000 1,492,766,000      
Total fair value of outstanding notes 1,366,348,000 1,666,769,000      
2024 Convertible Notes          
Debt Instrument [Line Items]          
Total principal amount 0 13,483,000      
Total unamortized debt discount 0 149,000      
Current portion of long-term debt, net 0 13,334,000      
Total fair value of outstanding notes 0 $ 32,176,000      
Remaining amortization per period of debt discount (in years)   1 year 10 months 24 days      
2024 Convertible Notes | Convertible Debt          
Debt Instrument [Line Items]          
Total principal amount         $ 460,000,000
2027 Convertible Notes          
Debt Instrument [Line Items]          
Total principal amount 805,000,000 $ 805,000,000      
Total unamortized debt discount 10,950,000 14,359,000      
Long-term debt, net 794,050,000 790,641,000      
Total fair value of outstanding notes $ 695,826,000 $ 784,770,000      
Remaining amortization per period of debt discount (in years) 3 years 2 months 12 days 4 years 2 months 12 days      
2027 Convertible Notes | Convertible Debt          
Debt Instrument [Line Items]          
Total principal amount       $ 805,000,000  
2028 Convertible Notes          
Debt Instrument [Line Items]          
Total principal amount $ 720,000,000 $ 720,000,000      
Total unamortized debt discount 14,802,000 17,875,000      
Long-term debt, net 705,198,000 702,125,000      
Total fair value of outstanding notes $ 670,522,000 $ 849,823,000      
Remaining amortization per period of debt discount (in years) 4 years 7 months 6 days 5 years 7 months 6 days      
2028 Convertible Notes | Convertible Debt          
Debt Instrument [Line Items]          
Total principal amount     $ 720,000,000    
v3.24.0.1
Long-Term Debt, Net - Components of Interest Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]      
Total amortization of debt discount $ 7,304 $ 7,839 $ 3,642
Convertible Debt      
Debt Instrument [Line Items]      
Total coupon interest 9,249 5,444 3,583
Total amortization of debt discount 6,506 4,867 3,642
Total interest expense 15,755 10,311 7,225
1.25% Convertible Senior Notes due 2024 | Convertible Debt      
Debt Instrument [Line Items]      
Total coupon interest 36 771 1,906
Total amortization of debt discount 24 357 838
Total interest expense $ 60 $ 1,128 $ 2,744
Effective interest rates 0.00% 1.80% 1.80%
0.25% Convertible Senior Notes due 2027 | Convertible Debt      
Debt Instrument [Line Items]      
Total coupon interest $ 2,013 $ 2,013 $ 1,677
Total amortization of debt discount 3,409 3,386 2,804
Total interest expense $ 5,422 $ 5,399 $ 4,481
Effective interest rates 0.70% 0.70% 0.70%
1.00% Convertible Senior Notes due 2028      
Debt Instrument [Line Items]      
Effective interest rates   1.50%  
1.00% Convertible Senior Notes due 2028 | Convertible Debt      
Debt Instrument [Line Items]      
Total coupon interest $ 7,200 $ 2,660 $ 0
Total amortization of debt discount 3,073 1,124 0
Total interest expense $ 10,273 $ 3,784 $ 0
Effective interest rates 1.50%    
v3.24.0.1
Long-Term Debt, Net - Future Maturities and Interest Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Debt Disclosure [Abstract]    
2024 $ 9,213  
2025 9,213  
2026 9,213  
2027 812,535  
2028 724,480  
Thereafter 0  
Total minimum payments 1,564,654  
Less amount representing coupon interest (39,654)  
Gross balance of long-term debt 1,525,000  
Less unamortized debt discount 25,752 $ 32,383
Carrying value of long-term debt 1,499,248 1,506,100
Less current portion of long-term debt 0 13,334
Long-term debt, less current portion and unamortized debt discount $ 1,499,248 $ 1,492,766
v3.24.0.1
Share-based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 12 Months Ended
Feb. 28, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares subject to outstanding awards (in shares)   7,800,000    
Shares reserved for future issuance (in shares)   12,100,000    
Cliff Vesting, First Anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Monthly Vesting, after One Year        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   2.08%    
Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Proceeds from options exercised   $ 10,000 $ 15,300 $ 16,600
RSUs | Cliff Vesting, First Anniversary        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights, percentage   25.00%    
Amended and Restated 2021 Stock Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized (in shares)   17,800,000    
Amended and Restated 2021 Stock Plan | Stock options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options, exercise price, percent of share price (percent)   100.00%    
Options, outstanding, initial contractual term   10 years    
Options, granted weighted average grant date fair value (in usd per share)   $ 17.72 $ 14.22 $ 18.21
Options, exercised, intrinsic value   $ 13,700 $ 21,600 $ 33,500
Proceeds from options exercised   $ 10,000 $ 15,300 $ 16,600
2021 ESPP Plan | Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Purchase price percent 85.00%      
Share purchases, employee payroll deduction percent minimum 1.00%      
Share purchases, employee payroll deduction maximum percent 15.00%      
Employee purchase maximum amount $ 25      
Shares available for grant (in shares)   2,604,222    
Purchase period 6 months      
Shares issued (in shares)   45,881    
v3.24.0.1
Share-based Compensation - Schedule of Share-based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total share-based compensation expense $ 36,620 $ 24,397 $ 20,820
Stock options      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total share-based compensation expense 16,351 10,973 10,252
RSAs, RSUs, PSUs and ESPP      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total share-based compensation expense 20,269 13,424 10,568
Research and development      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total share-based compensation expense 13,345 9,903 6,992
Selling, general and administrative      
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]      
Total share-based compensation expense $ 23,275 $ 14,494 $ 13,828
v3.24.0.1
Share-based Compensation - Unrecognized Expense (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
Stock options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 39,841
Remaining Weighted-Average Recognition Period ( in years) 2 years 8 months 4 days
RSUs  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 33,566
Remaining Weighted-Average Recognition Period ( in years) 2 years 4 months 2 days
PSUs  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 6,110
Remaining Weighted-Average Recognition Period ( in years) 1 year 5 months 4 days
Employee Stock  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized Expense $ 262
Remaining Weighted-Average Recognition Period ( in years) 5 months 12 days
v3.24.0.1
Share-based Compensation - Options (Details)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
$ / shares
shares
Shares Underlying Stock Options  
Outstanding, Beginning (in shares) | shares 5,368,225
Grants (in shares) | shares 1,979,286
Exercised (in shares) | shares (565,343)
Canceled/forfeitures (in shares) | shares (359,331)
Outstanding, Ending (in shares) | shares 6,422,837
Vested and expected to vest, End of period (in shares) | shares 6,422,837
Exercisable, End of period (in shares) | shares 3,620,251
Weighted Average Exercise Price per Share  
Outstanding, Beginning (in usd per share) | $ / shares $ 24.99
Granted (in usd per share) | $ / shares 43.93
Exercised (in usd per share) | $ / shares 17.70
Canceled/forfeited (in usd per share) | $ / shares 42.33
Outstanding, Ending (in usd per share) | $ / shares 30.50
Vested and expected to vest, Ending weighted average exercise price (in usd per share) | $ / shares 30.50
Exercisable, Ending weighted average exercise price (in usd per share) | $ / shares $ 21.67
Weighted Average Remaining Contractual Term ( in years)  
Outstanding, End of period 6 years 7 months 20 days
Vested and expected to vest, End of period 6 years 7 months 20 days
Exercisable, End of period 4 years 11 months 15 days
Aggregate Intrinsic Value  
Outstanding, End of period | $ $ 64.0
Vested and expected to vest, End of period | $ 64.0
Exercisable, End of period | $ $ 60.0
v3.24.0.1
Share-based Compensation - Valuation (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]      
Average expected term (in years) 4 years 9 months 18 days 4 years 8 months 12 days 4 years 8 months 12 days
Risk free interest rate, minimum 3.37% 1.37% 0.36%
Risk free interest rate, maximum 4.72% 4.27% 1.20%
Expected dividend yield 0.00% 0.00% 0.00%
Minimum      
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]      
Expected volatility 39.68% 39.91% 41.01%
Maximum      
Schedule of Share-based Compensation Arrangements Valuation Inputs [Line Items]      
Expected volatility 40.82% 50.81% 46.45%
v3.24.0.1
Share-based Compensation - Restricted Stock Units (Details) - RSUs - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding, Beginning (in shares) 1,039,381    
Granted (in shares) 646,793    
Vested (in shares) (400,309)    
Forfeited (in shares) (146,529)    
Outstanding, Ending (in shares) 1,139,336 1,039,381  
Weighted Average Grant Date Fair Value      
Outstanding, Beginning (in usd per share) $ 35.76    
Granted (in usd per share) 45.16    
Vested (in usd per share) 32.11    
Forfeited (in usd per share) 43.50    
Outstanding, Ending (in usd per share) $ 41.38 $ 35.76  
Weighted Average Remaining Contractual Term (in years) 1 year 3 months 7 days    
Aggregate Intrinsic Value $ 42.1    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Additional Disclosures [Abstract]      
Vested in period, fair value 12.9 $ 8.6 $ 6.6
Aggregate intrinsic value, vested $ 18.3 $ 11.3 $ 19.0
v3.24.0.1
Share-based Compensation - Performance Stock Units (Details) - PSUs - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding, Beginning (in shares) 142,844    
Granted (in shares) 106,174    
Vested (in shares) (3,803)    
Forfeited (in shares) (2,660)    
Outstanding, Ending (in shares) 242,555 142,844  
Weighted Average Grant Date Fair Value      
Outstanding, Beginning (in usd per share) $ 46.01    
Granted (in usd per share) 59.34    
Vested (in usd per share) 49.35    
Forfeited (in usd per share) 52.79    
Outstanding, Ending (in usd per share) $ 51.72 $ 46.01  
Aggregate intrinsic value, vested $ 0.2 $ 0.2 $ 0.1
v3.24.0.1
Stockholders' Equity - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended 25 Months Ended
Nov. 30, 2023
Dec. 31, 2021
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2023
Stockholders' equity (deficit) (textual)                    
Stock option exercised (in shares)             565,343      
Options, outstanding in shares)     6,422,837       6,422,837 5,368,225   6,422,837
Authorized repurchase amount   $ 750,000,000             $ 750,000,000  
Stock repurchase program, period   3 years                
Stock repurchased (shares)               4,500,000 3,900,000 12,600,000
Weighted average price per share (in usd per share)     $ 0 $ 0 $ 0 $ 36.01 $ 36.01 $ 44.44 $ 38.51 $ 39.81
Value of stock repurchased     $ 0 $ 0 $ 0 $ 150,083,000 $ 150,083,000 $ 200,000,000 $ 150,000,000 $ 500,000,000
ASR Agreement                    
Stockholders' equity (deficit) (textual)                    
Stock repurchased (shares) 5,500,000                  
Weighted average price per share (in usd per share) $ 0                  
Value of stock repurchased $ 250,000,000           $ 250,000,000      
Accelerated share repurchases (payment) $ 250,000,000                  
Stock options                    
Stockholders' equity (deficit) (textual)                    
Stock option exercised (in shares)             565,343 789,870 1,179,032  
Net proceeds from stock options exercised             $ 10,000,000 $ 15,300,000 $ 16,600,000  
RSUs                    
Stockholders' equity (deficit) (textual)                    
Issuance of restricted stock awards, net (in shares)             333,379 254,907 299,958  
Number of RSUs surrendered to pay for minimum withholding taxes (in shares)             70,733 68,425 94,795  
Payments for tax withholding for restricted stock units vested, net             $ 7,300,000 $ 4,400,000 $ 8,200,000  
Stock options and restricted stock units                    
Stockholders' equity (deficit) (textual)                    
Options, outstanding in shares)   5,900,000 7,800,000       7,800,000 6,600,000 5,900,000 7,800,000
v3.24.0.1
Stockholders' Equity - Share Repurchase Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended 25 Months Ended
Nov. 30, 2023
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2023
Equity [Abstract]                  
Total Number of Shares Purchased (in shares)   0 0 0 4,165,258 4,165,258      
Weighted Average Price Paid Per Share (in usd per share)   $ 0 $ 0 $ 0 $ 36.01 $ 36.01 $ 44.44 $ 38.51 $ 39.81
Total Cost   $ 0 $ 0 $ 0 $ 150,083 $ 150,083 $ 200,000 $ 150,000 $ 500,000
Fee per share (usd per share)           $ 0.02      
Accelerated Share Repurchases [Line Items]                  
Value of stock repurchased   $ 0 $ 0 $ 0 $ 150,083 $ 150,083 $ 200,000 $ 150,000 $ 500,000
Accelerated share repurchases (in shares)   0 0 0 4,165,258 4,165,258      
ASR Agreement                  
Equity [Abstract]                  
Total Number of Shares Purchased (in shares) 5,452,563                
Weighted Average Price Paid Per Share (in usd per share) $ 0                
Total Cost $ 250,000         $ 250,000      
Accelerated Share Repurchases [Line Items]                  
Value of stock repurchased $ 250,000         $ 250,000      
Accelerated share repurchases (in shares) 5,452,563                
v3.24.0.1
Earnings per share - Basic and Diluted Income Per Common Share Computation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Numerator      
Net income $ 281,594 $ 202,129 $ 402,710
Denominator      
Weighted average common shares outstanding for basic earnings per share (in shares) 131,927 136,844 140,646
Dilutive potential common stock outstanding      
Weighted average common shares outstanding for diluted net earnings per share (in shares) 134,197 140,608 146,796
Earnings per share      
Earnings per share - basic (usd per share) $ 2.13 $ 1.48 $ 2.86
Earnings per share - diluted (usd per share) $ 2.10 $ 1.44 $ 2.74
Convertible Notes      
Dilutive potential common stock outstanding      
Dilutive potential common stock outstanding (shares) 58 1,077 2,858
Stock options      
Dilutive potential common stock outstanding      
Dilutive potential common stock outstanding (shares) 1,824 2,265 2,737
RSUs, PSUs and ESPP      
Dilutive potential common stock outstanding      
Dilutive potential common stock outstanding (shares) 388 422 555
v3.24.0.1
Earnings per share - Shares Excluded from the Calculation of Diluted Net Income Per Common Share (Details) - shares
shares in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Earnings Per Share [Abstract]      
Anti-dilutive securities 27.8 20.7 13.8
v3.24.0.1
Commitments and Contingencies - Operating Leases Narative (Details)
ft² in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2023
USD ($)
ft²
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Commitments and Contingencies Disclosure [Abstract]      
Leased space | ft² 162    
Operating lease, expense | $ $ 9.3 $ 3.3 $ 2.0
Weighted average remaining lease term 6 years 7 months 28 days    
v3.24.0.1
Commitments and Contingencies - Annual Future Minimum Lease Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]    
2024 $ 6,580  
2025 6,025  
2026 5,676  
2027 5,296  
2028 5,447  
Thereafter 11,686  
Total minimum lease payments 40,710  
Less imputed interest (8,513)  
Total $ 32,197 $ 34,788
v3.24.0.1
Income Taxes - Income (Loss) Before Income Taxes Summarized by Region (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
United States $ 348,828 $ 248,918 $ 248,071
Foreign (499) 0 447
Net income before income taxes $ 348,329 $ 248,918 $ 248,518
v3.24.0.1
Income Taxes - Components of Deferred Tax Assets (Liabilities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets    
Net operating loss carryforwards $ 32,753 $ 32,887
Deferred revenue 31 837
Research and development and orphan drug credits 38,192 96,133
Share-based compensation 5,024 6,353
ASC 842 lease liability 7,258 2,480
Capitalized research expense 19,543 10,168
Transaction related expense 0 2,354
Inventory related reserves 13,561 18,395
Other, net 6,715 3,054
Total deferred tax assets 123,077 172,661
Valuation allowance for deferred tax assets (2,588) (707)
Deferred tax assets, net of valuation allowance 120,489 171,954
Deferred tax liabilities    
Non-deductible book amortization (103,492) (115,578)
Depreciation (3,522) (2,559)
ASC 842 right of use asset (8,259) (9,061)
Other, net (830) (330)
Total deferred tax liabilities (116,103) (127,528)
Net deferred tax asset $ 4,386 $ 44,426
v3.24.0.1
Income Taxes - Narrative (Details) - USD ($)
May 24, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Tax Credit Carryforward [Line Items]          
Valuation allowance for deferred tax assets   $ 2,588,000 $ 707,000    
Unrecognized tax benefits   21,918,000 19,482,000 $ 17,692,000 $ 19,167,000
Undistributed foreign earnings   0 $ 0    
Domestic Tax Authority          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards   46,800,000      
Domestic Tax Authority | Research Tax Credit Carryforward          
Tax Credit Carryforward [Line Items]          
Tax credit carryforwards   38,400,000      
State and Local Jurisdiction | California          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards   235,800,000      
State and Local Jurisdiction | Other States          
Tax Credit Carryforward [Line Items]          
Operating loss carryforwards   66,800,000      
State and Local Jurisdiction | Research Tax Credit Carryforward | California          
Tax Credit Carryforward [Line Items]          
Tax credit carryforwards   $ 24,800,000      
Antares Pharma, Inc          
Tax Credit Carryforward [Line Items]          
Deferred tax liability, increase, from acquisition of intangibles and inventory $ 119,700,000        
v3.24.0.1
Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Current - federal $ 24,963 $ 6,157 $ (9)
Current - state 5,717 2,525 1,251
Deferred - federal 34,037 44,757 (117,925)
Deferred - state 2,018 (6,650) (37,509)
Total income tax expense (benefit) $ 66,735 $ 46,789 $ (154,192)
v3.24.0.1
Income Taxes - Schedule of Income Tax Reconciliation (Details)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Federal income tax expense 21.00% 21.00% 21.00%
State income tax expense, net of federal income tax impact 2.76% 0.82% 2.67%
Decrease in valuation allowance 0.00% (0.39%) (84.92%)
Foreign income subject to tax at other than federal statutory rate 0.03% 0.00% 0.02%
Share-based compensation (0.21%) (0.66%) (2.50%)
Executive compensation limitation 0.90% 2.61% 2.32%
Non-deductible expenses and other 0.80% (0.40%) 0.54%
Foreign-derived intangible income (3.44%) (5.06%) (1.18%)
Transaction costs 0.00% 0.88% 0.00%
Research and development credits, net (2.71%) 0.00% 0.00%
Effective income tax rate 19.13% 18.80% (62.05%)
v3.24.0.1
Income Taxes - Unrecognized Tax Benefit (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Gross unrecognized tax benefits, beginning of period $ 19,482 $ 17,692 $ 19,167
Increases in tax positions for prior years 1,645 0 21
Decreases in tax positions for prior years and lapse in statute of limitations 0 (1,148) (1,496)
Increases in tax positions related to business acquisition 0 2,151 0
Increases in tax positions for current year 791 787 0
Gross unrecognized tax benefits, end of period $ 21,918 $ 19,482 $ 17,692
v3.24.0.1
Employee Savings Plan (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Retirement Benefits [Abstract]      
Employer contribution amount $ 3.3 $ 2.6 $ 1.1
v3.24.0.1
Schedule II Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]      
Accounts receivable allowance, beginning balance $ 1,914 $ 1,140 $ 1,003
Acquired 0 924 0
Additions 49,596 5,946 8,131
Deductions (44,763) (6,096) (7,994)
Accounts receivable allowance, ending balance $ 6,747 $ 1,914 $ 1,140
v3.24.0.1
Label Element Value
Accounting Standards Update [Extensible Enumeration] us-gaap_AccountingStandardsUpdateExtensibleList Accounting Standards Update 2020-06 [Member]