PURE STORAGE, INC., 10-Q filed on 12/9/2019
Quarterly Report
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Cover Page - shares
9 Months Ended
Oct. 31, 2019
Dec. 04, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Oct. 31, 2019  
Document Transition Report false  
Entity File Number 001-37570  
Entity Registrant Name Pure Storage, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 27-1069557  
Entity Address, Address Line One 650 Castro Street,  
Entity Address, Address Line Two Suite 400  
Entity Address, City or Town Mountain View  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94041  
City Area Code 800  
Local Phone Number 379-7873  
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  
Entity Shell Company false  
Title of 12(b) Security Class A Common Stock, $0.0001 par value per share  
Trading Symbol PSTG  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding (in shares)   260,375,453
Amendment Flag false  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001474432  
Current Fiscal Year End Date --01-31  
v3.19.3.a.u2
Condensed Consolidated Balance Sheets - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Current assets:    
Cash and cash equivalents $ 304,346 $ 447,990
Marketable securities 936,969 749,482
Accounts receivable, net of allowance of $660 and $589 as of January 31, 2019 and October 31, 2019 362,115 378,729
Inventory 39,851 44,687
Deferred commissions, current 32,360 29,244
Prepaid expenses and other current assets 46,539 51,695
Total current assets 1,722,180 1,701,827
Property and equipment, net 130,236 125,353
Operating lease right-of-use assets 119,403  
Deferred commissions, non-current 90,771 85,729
Intangible assets, net 61,028 20,118
Goodwill 36,420 10,997
Deferred income taxes, non-current 1,239 1,060
Restricted cash 15,287 15,823
Other assets, non-current 16,215 12,118
Total assets 2,192,779 1,973,025
Current liabilities:    
Accounts payable 59,650 103,462
Accrued compensation and benefits 59,901 99,910
Accrued expenses and other liabilities 48,223 39,860
Operating lease liabilities, current 26,574  
Deferred revenue, current 325,947 266,584
Total current liabilities 520,295 509,816
Convertible senior notes, net 470,014 449,828
Operating lease liabilities, non-current 100,023  
Deferred revenue, non-current 317,251 269,336
Deferred tax liabilities, non-current 5,658 0
Other liabilities, non-current 1,588 6,265
Total liabilities 1,414,829 1,235,245
Commitments and contingencies (Note 7)
Stockholders’ equity:    
Preferred stock, par value of $0.0001 per share— 20,000 shares authorized as of January 31, 2019 and October 31, 2019; no shares issued and outstanding as of January 31, 2019 and October 31, 2019 0 0
Class A and Class B common stock, par value of $0.0001 per share—2,250,000 (Class A 2,000,000, Class B 250,000) shares authorized as of January 31, 2019 and October 31, 2019; 243,524 and 259,920 Class A shares issued and outstanding as of January 31, 2019 and October 31, 2019 26 24
Additional paid-in capital 2,051,093 1,820,043
Accumulated other comprehensive income (loss) 5,116 (338)
Accumulated deficit (1,278,285) (1,081,949)
Total stockholders’ equity 777,950 737,780
Total liabilities and stockholders’ equity $ 2,192,779 $ 1,973,025
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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Accounts receivable, allowance $ 589 $ 660
Preferred stock    
Preferred stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Shares authorized (in shares) 20,000,000 20,000,000
Shares issued (in shares) 0 0
Shares outstanding (in shares) 0 0
Common stock    
Shares authorized (in shares) 2,250,000,000 2,250,000,000
Class A    
Common stock    
Par value per share (in dollars per share) $ 0.0001 $ 0.0001
Shares authorized (in shares) 2,000,000,000 2,000,000,000
Shares issued (in shares) 259,920,406 243,524,000
Shares outstanding (in shares) 259,920,406 243,524,000
Class B    
Common stock    
Par value per share (in dollars per share) $ 0.0001 $ 0.0001
Shares authorized (in shares) 250,000,000 250,000,000
v3.19.3.a.u2
Condensed Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Revenue $ 428,409 $ 372,779 $ 1,151,436 $ 937,608
Cost of revenue 127,771 123,659 366,092 316,008
Gross profit 300,638 249,120 785,344 621,600
Operating expenses:        
Research and development 106,663 90,783 318,758 253,306
Sales and marketing 184,819 146,903 537,633 413,019
General and administrative 37,416 38,651 119,542 99,572
Total operating expenses 328,898 276,337 975,933 765,897
Loss from operations (28,260) (27,217) (190,589) (144,297)
Other income (expense), net 9 (2,889) (2,459) (7,920)
Loss before provision (benefit) for income taxes (28,251) (30,106) (193,048) (152,217)
Income tax provision (benefit) 1,731 (1,926) 3,288 390
Net loss $ (29,982) $ (28,180) $ (196,336) $ (152,607)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) $ (0.12) $ (0.12) $ (0.78) $ (0.66)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares) 255,047 235,205 250,618 229,505
Product        
Revenue $ 323,268 $ 298,863 $ 862,137 $ 735,449
Cost of revenue 89,998 96,610 259,460 241,292
Support subscription        
Revenue 105,141 73,916 289,299 202,159
Cost of revenue $ 37,773 $ 27,049 $ 106,632 $ 74,716
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Condensed Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Statement of Comprehensive Income [Abstract]        
Net loss $ (29,982) $ (28,180) $ (196,336) $ (152,607)
Other comprehensive income (loss) net of tax:        
Change in unrealized net gain (loss) on available-for-sale securities 1,707 (273) 5,454 (1,182)
Comprehensive loss $ (28,275) $ (28,453) $ (190,882) $ (153,789)
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Condensed Consolidated Statements of Stockholders’ Equity - USD ($)
shares in Thousands, $ in Thousands
Total
Common Stock
Additional Paid-In Capital
Accumulated Other Comprehensive Income (Loss)
Accumulated Deficit
Restricted Stock Units
Restricted Stock Units
Common Stock
Restricted Stock Units
Additional Paid-In Capital
Restricted Stock
Common Stock
Beginning balance (in shares) at Jan. 31, 2018   220,979              
Beginning balance at Jan. 31, 2018 $ 574,401 $ 22 $ 1,479,883 $ (1,917) $ (903,587)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common stock upon exercise of stock options (in shares)   8,250              
Issuance of common stock upon exercise of stock options 43,378 $ 1 43,377            
Stock-based compensation expense 155,938   155,938            
Vesting of early exercised stock options 320   320            
Vesting of restricted stock units (in shares)             6,429    
Common stock issued under employee stock purchase plan (in shares)   3,380              
Common stock issued under employee stock purchase plan 33,444   33,444            
Net issuance of restricted stock (in shares)                 3,330
Net issuance of restricted stock           $ 1     $ 1
Repurchase of common stock (in shares)   (1,009)              
Repurchase of common stock (20,000)   (20,000)            
Purchase of capped calls (64,630)   (64,630)            
Equity component of convertible senior notes, net 133,265   133,265            
Other comprehensive income (loss) (1,182)     (1,182)          
Net loss (152,607)       (152,607)        
Ending balance (in shares) at Oct. 31, 2018   241,359              
Ending balance at Oct. 31, 2018 702,328 $ 24 1,761,597 (3,099) (1,056,194)        
Beginning balance (in shares) at Jul. 31, 2018   235,412              
Beginning balance at Jul. 31, 2018 644,394 $ 24 1,675,210 (2,826) (1,028,014)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common stock upon exercise of stock options (in shares)   2,366              
Issuance of common stock upon exercise of stock options 14,312   14,312            
Stock-based compensation expense 58,329   58,329            
Vesting of restricted stock units (in shares)             2,312    
Common stock issued under employee stock purchase plan (in shares)   1,269              
Common stock issued under employee stock purchase plan 13,746   13,746            
Other comprehensive income (loss) (273)     (273)          
Net loss (28,180)       (28,180)        
Ending balance (in shares) at Oct. 31, 2018   241,359              
Ending balance at Oct. 31, 2018 702,328 $ 24 1,761,597 (3,099) (1,056,194)        
Beginning balance (in shares) at Jan. 31, 2019   243,524              
Beginning balance at Jan. 31, 2019 737,780 $ 24 1,820,043 (338) (1,081,949)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common stock upon exercise of stock options (in shares)   4,797              
Issuance of common stock upon exercise of stock options 26,006 $ 1 26,005            
Stock-based compensation expense 170,542   170,542            
Vesting of restricted stock units (in shares)             6,884    
Vesting of restricted stock units           $ 0 $ 1 $ (1)  
Common stock issued under employee stock purchase plan (in shares)   3,743              
Common stock issued under employee stock purchase plan 43,291   43,291            
Net issuance of restricted stock (in shares)                 972
Tax withholding on vesting of restricted stock (8,787)   (8,787)            
Other comprehensive income (loss) 5,454     5,454          
Net loss (196,336)       (196,336)        
Ending balance (in shares) at Oct. 31, 2019   259,920              
Ending balance at Oct. 31, 2019 777,950 $ 26 2,051,093 5,116 (1,278,285)        
Beginning balance (in shares) at Jul. 31, 2019   255,752              
Beginning balance at Jul. 31, 2019 737,539 $ 26 1,982,407 3,409 (1,248,303)        
Increase (Decrease) in Stockholders' Equity [Roll Forward]                  
Issuance of common stock upon exercise of stock options (in shares)   934              
Issuance of common stock upon exercise of stock options 6,715   6,715            
Stock-based compensation expense 52,336   52,336            
Vesting of restricted stock units (in shares)             2,557    
Common stock issued under employee stock purchase plan (in shares)   770              
Common stock issued under employee stock purchase plan 11,249   11,249            
Net issuance of restricted stock (in shares)                 (93)
Tax withholding on vesting of restricted stock (1,614)   (1,614)            
Other comprehensive income (loss) 1,707     1,707          
Net loss (29,982)       (29,982)        
Ending balance (in shares) at Oct. 31, 2019   259,920              
Ending balance at Oct. 31, 2019 $ 777,950 $ 26 $ 2,051,093 $ 5,116 $ (1,278,285)        
v3.19.3.a.u2
Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES    
Net loss $ (196,336) $ (152,607)
Adjustments to reconcile net loss to net cash provided by operating activities:    
Depreciation and amortization 66,785 51,381
Amortization of debt discount and debt issuance costs 20,186 14,414
Stock-based compensation expense 174,790 155,938
Other (483) (5,037)
Changes in operating assets and liabilities, net of effects of acquisitions:    
Accounts receivable, net 17,079 (62,623)
Inventory 2,722 (17,103)
Deferred commissions (8,158) (9,127)
Prepaid expenses and other assets 1,464 1,996
Operating lease right-of-use assets 19,962  
Accounts payable (35,244) 11,800
Accrued compensation and other liabilities (31,011) 7,592
Operating lease liabilities (19,020)  
Deferred revenue 106,980 87,005
Net cash provided by operating activities 119,716 83,629
CASH FLOWS FROM INVESTING ACTIVITIES    
Purchases of property and equipment (74,206) (70,807)
Acquisitions, net of cash acquired (51,594) (13,899)
Purchase of intangible assets (9,000) 0
Purchases of marketable securities (640,024) (558,248)
Sales of marketable securities 116,518 18,802
Maturities of marketable securities 345,657 156,049
Net cash used in investing activities (312,649) (468,103)
CASH FLOWS FROM FINANCING ACTIVITIES    
Net proceeds from exercise of stock options 25,804 43,342
Proceeds from issuance of common stock under employee stock purchase plan 43,291 33,444
Proceeds from issuance of convertible senior notes, net of issuance costs 0 562,062
Payment for purchase of capped calls 0 (64,630)
Repayment of debt assumed from acquisitions (11,555) (6,101)
Tax withholding on vesting of restricted stock (8,787) 0
Repurchase of common stock 0 (20,000)
Net cash provided by financing activities 48,753 548,117
Net increase (decrease) in cash, cash equivalents and restricted cash (144,180) 163,643
Cash, cash equivalents and restricted cash, beginning of period 463,813 258,820
Cash, cash equivalents and restricted cash, end of period 319,633 422,463
CASH, CASH EQUIVALENTS AND RESTRICTED CASH AT END OF PERIOD:    
Cash, cash equivalents and restricted cash, end of period 319,633 422,463
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION    
Cash paid for income taxes 3,398 4,121
Cash paid for interest 718 371
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION    
Property and equipment purchased but not yet paid 5,202 14,605
Acquisition consideration held back to satisfy potential indemnification claims 0 3,725
Vesting of early exercised stock options $ 0 $ 320
v3.19.3.a.u2
Business Overview
9 Months Ended
Oct. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Business Overview Business Overview
Organization and Description of Business
Pure Storage, Inc. (the Company, we, us, or other similar pronouns) was originally incorporated in the state of Delaware in October 2009 under the name OS76, Inc. In January 2010, we changed our name to Pure Storage, Inc. We are headquartered in Mountain View, California and have wholly owned subsidiaries throughout the world.
We help innovators to build a better world with data. Our innovative data platform replaces storage systems designed for mechanical disk with all-flash systems optimized for end-to-end for solid-state memory. Our cloud-based management and support platform helps predictively resolve potential issues and simplify storage administration. We provide a customer first business model that replaces the traditional forklift upgrade cycle with a subscription model built to keep customers on the cutting edge without downtime or performance impact.
v3.19.3.a.u2
Basis of Presentation and Summary of Significant Accounting Policies
9 Months Ended
Oct. 31, 2019
Accounting Policies [Abstract]  
Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies
Principles of Consolidation
The condensed consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
New fiscal year end
In September 2019, we adopted a fiscal year consisting of four 13-week quarters, which will be effective for our fourth quarter beginning on November 1, 2019 and ending on February 2, 2020. Each quarter will start on a Monday and end on a Sunday. Fiscal year 2021 will start on February 3, 2020 and end on January 31, 2021, and will be comprised of four fiscal quarters ending on May 3, 2020, August 2, 2020, November 1, 2020 and January 31, 2021, respectively. The updated calendar will occasionally include a 14-week fourth quarter, which will first occur in fiscal year 2022, starting on November 1, 2021 and ending on February 6, 2022.

Unaudited Interim Consolidated Financial Information
The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended January 31, 2019.
In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2020 or any future period.
Use of Estimates
The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates. Such estimates include, but are not limited to, the determination of standalone selling price for revenue arrangements with multiple performance obligations, useful lives of intangible assets, property and equipment, the period of benefit for deferred contract costs for commissions, stock-based compensation, provision for income taxes including related reserves, valuation of intangible assets and goodwill, the incremental borrowing rate we use to determine our operating lease liabilities. Management bases its estimates on historical experience and on various other assumptions which management believes to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Restricted Cash
Restricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program. As of January 31, 2019 and October 31, 2019, we had restricted cash of $15.8 million and $15.3 million.
Marketable Securities
We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses, in accumulated other comprehensive income (loss), which is reflected as a component of stockholders’ equity. We evaluate our securities to assess whether those with unrealized loss positions are other than temporarily impaired. We consider impairments to be other than temporary if they are related to deterioration in credit risk or if it is likely we will sell the securities before the recovery of their cost basis. Realized gains and losses from the sale of marketable securities and declines in value deemed to be other than temporary are determined on the specific identification method. To date, there have been no declines in value deemed to be other than temporary in any of our securities. Realized gains and losses are reported in other income (expense), net in the condensed consolidated statements of operations.
Business Combinations
We allocate the purchase price to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase price over the fair values of the assets acquired and liabilities assumed is recorded as goodwill. During the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the estimated fair value of the assets acquired and liabilities assumed, with the corresponding offset to goodwill. The results of operations of an acquired business is included in our condensed consolidated financial statements from the date of acquisition. Acquisition-related expenses are expensed as incurred. 
Deferred Commissions
Deferred commissions consist of incremental costs paid to our sales force to obtain customer contracts. Deferred commissions related to product revenue are recognized upon transfer of control to customers and deferred commissions related to support subscription revenue are amortized over an expected useful life of six years. We determine the expected useful life based on an estimated benefit period by evaluating our technology development life cycle, expected customer relationship period and other factors. We classify deferred commissions as current and non-current on our condensed consolidated balance sheets based on the timing of when we expect to recognize the expense. Amortization of deferred commissions is included in sales and marketing expense in the condensed consolidated statements of operations.
Changes in total deferred commissions during the periods presented are as follows (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Beginning balance (1)
$91,469  $118,568  $87,313  $114,973  
Additions31,884  34,071  71,887  82,381  
Recognition of deferred commissions(26,913) (29,508) (62,760) (74,223) 
Ending balance$96,440  $123,131  $96,440  $123,131  
____________________________________
 
(1) Balance as of January 31, 2018 was adjusted to reflect the adoption of ASC 606.
Of the $123.1 million total deferred commissions balance as of October 31, 2019, we expect to recognize approximately 26% as commission expense over the next 12 months and the remainder thereafter.
There was no impairment related to capitalized commissions for the three and nine months ended October 31, 2018 and 2019.
Operating Leases

We determine if an arrangement contains a lease at inception. Lease liabilities are recognized at the present value of the future lease payments at commencement date. The interest rate implicit in our operating leases is not readily determinable, and therefore an incremental borrowing rate is estimated to determine the present value of future payments. The estimated incremental borrowing rate factors in a hypothetical interest rate on a collateralized basis with similar terms, payments, and economic environments. The operating lease right-of-use (ROU) asset is determined based on the lease liability initially established and reduced for any prepaid lease payments and any lease incentives. We have elected to not allocate the contract consideration for operating lease contracts with lease and non-lease components, and account for the lease and non-lease components as a single lease component.

Certain of the operating lease agreements contain rent concession, rent escalation, and option to renew provisions. Rent concession and rent escalation provisions are considered in determining the lease cost. Lease cost is recognized on a straight-line basis over the lease term commencing on the date we have the right to use the leased property. We generally use the base, non-cancelable, lease term when recognizing the lease assets and liabilities, unless it is reasonably certain that an extension or termination option will be exercised.

In addition, certain of our operating lease agreements contain tenant improvement allowances from our landlords. These allowances are accounted for as lease incentives and reduce our ROU asset and lease cost over the lease term.

For short-term leases with lease term no longer than twelve months, and do not include an option to purchase the underlying asset that we are reasonably certain to exercise, we recognize rent expense in our condensed consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred.
Deferred Revenue
Deferred revenue primarily consists of amounts that have been invoiced but that have not yet been recognized as revenue and performance obligations pertaining to support subscription services. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the condensed consolidated balance sheet dates.
Changes in total deferred revenue during the periods presented are as follows (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Beginning balance (1)
$413,247  $607,263  $374,102  $535,920  
Additions122,681  142,164  290,463  400,605  
Recognition of deferred revenue(74,740) (106,229) (203,377) (293,327) 
Ending balance$461,188  $643,198  $461,188  $643,198  
____________________________________
 
(1) Balance as of January 31, 2018 was adjusted to reflect the adoption of ASC 606.
During the three and nine months ended October 31, 2018, we recognized $67.0 million and $151.4 million in revenue pertaining to deferred revenue as of the beginning of each period. During the three and nine months ended
October 31, 2019, we recognized $101.4 million and $213.2 million in revenue pertaining to deferred revenue as of the beginning of each period.
Total contracted but not recognized revenue was $810.8 million as of October 31, 2019. Contracted but not recognized revenue consists of both deferred revenue and non-cancelable amounts that will be invoiced and recognized as revenue in future periods. Of the $810.8 million contracted but not recognized revenue as of October 31, 2019, we expect to recognize approximately 41% over the next 12 months, and the remainder thereafter.
Revenue Recognition
We derive revenue from two sources: (1) product revenue which includes hardware and embedded software and (2) support subscription revenue which includes customer support, hardware maintenance, and software upgrades on a when-and-if-available basis. Support subscription revenue also includes our Pure as-a-Service offerings, including the offering formerly known as Evergreen Storage Service (ES2).
Our product revenue is derived from the sale of storage hardware and operating system software that is integrated into the hardware. We typically recognize product revenue upon transfer of control to our customers. Products are typically shipped directly by us to customers, and our channel partners do not stock our inventory.
Our support subscription revenue is derived from the sale of support subscription, which includes the right to receive unspecified software upgrades and enhancements on a when-and-if-available basis, bug fixes, parts replacement services related to the hardware, as well as access to our cloud-based management and support platform. Support subscription revenue is also derived from the sale of our Pure as-a-Service offerings. Revenue related to support revenue is recognized ratably over the contractual term, which generally ranges from one to six years and represents our performance obligations period. The vast majority of our products are sold with support subscription agreements, which typically commence upon transfer of control of the corresponding products to our customers. Costs to service the support subscription are expensed as incurred. In addition, our Evergreen Storage program provides our customers who continually maintain active support subscription agreements for three years with an included controller refresh with each additional three year support subscription renewal. In accordance with revenue recognition guidance, the controller refresh represents an additional performance obligation and the allocated revenue is recognized in the period in which these controllers are shipped.
We recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration we expect to be entitled in exchange for those goods or services. This is achieved through applying the following five-step approach:
Identification of the contract, or contracts, with a customer
Identification of the performance obligations in the contract
Determination of the transaction price
Allocation of the transaction price to the performance obligations in the contract
Recognition of revenue when, or as, we satisfy a performance obligation
When applying this five-step approach, we apply judgment in determining the customer's ability and intention to pay, which is based on a variety of factors including the customer's historical payment experience and/or published credit and financial information pertaining to the customer. To the extent a customer contract includes multiple promised goods or services, we determine whether promised goods or services are capable of being distinct in the context of the contract to be accounted for as a separate performance obligation. The transaction price is determined based on the consideration which we will be entitled to in exchange for transferring goods or services to the customer. We allocate transaction price to each performance obligation for contracts that contain multiple performance obligations based on a relative standalone selling price which is determined based on the price at which the performance obligation is sold separately, or if not observable through past transactions, is estimated taking into account available information such as market conditions and internally approved pricing guidelines related to performance obligations.
Recently Adopted Accounting Pronouncements
In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2016-02, Leases (ASC 842) and subsequent amendments to the initial guidance (collectively, Topic 842). ASC 842 requires lessees to generally recognize on its balance sheet operating and financing lease liabilities and corresponding ROU assets at the commencement date, and to recognize the associated lease expenses in the condensed consolidated statement of operations in a manner similar to that required under historical accounting rules.
On February 1, 2019, we adopted ASC 842 using the modified retrospective approach by electing to use the optional transition method which allows us to continue to apply the guidance of ASC 840, including disclosure requirements, in the comparative periods presented. We elected the package of transition expedients, which allowed us to carry forward our historical lease classifications, our assessment of whether any existing leases as of the date of adoption are or contain leases, and our assessment of indirect costs for any leases that existed prior to adoption of the new standard. We elected to take the practical expedient to keep leases with an initial term of 12 months or less off the condensed consolidated balance sheet and recognize the associated lease payments in the consolidated statements of operations on a straight-line basis over the lease term. We recognized operating ROU assets of $124.5 million and lease liabilities of $130.6 million on our condensed consolidated balance sheet as of February 1, 2019, which included reclassifying prepaid rent and deferred rent as a component of the ROU asset. Topic 842 did not have a material impact on our condensed consolidated statements of operations and cash flows. Refer to Note 8 for additional disclosures.
In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 and requires certain disclosures about stranded tax effects. We adopted this standard on February 1, 2019 and the adoption had no impact on our condensed consolidated financial statements.
Recent Accounting Pronouncements Not Yet Adopted
In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). ASU 2016-13 amends guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities to require that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down. The measurement of credit losses for newly recognized financial assets and subsequent changes in the allowance for credit losses are recorded in the statements of operations. The amendments in this update will be effective for us beginning on February 3, 2020. We do not believe the adoption of this standard will have a material impact to our condensed consolidated financial statements.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13) which amended its conceptual framework to improve the effectiveness of disclosures in notes to financial statements. ASU 2018-13 eliminates such disclosures around the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy. The guidance also adds new disclosure requirements for Level 3 measurements. ASU 2018-13 is effective for us beginning February 3, 2020. We do not believe this standard will have a material impact on our condensed consolidated financial statements.
In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (ASU 2018-15). ASC 2018-15 aligns the requirements for capitalizing implementation costs in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This standard will be effective for us beginning February 3, 2020 and will be applied either retrospectively or prospectively. We plan to adopt this new accounting standard prospectively, and we do not expect the adoption will have a material impact on our condensed consolidated financial statements.
v3.19.3.a.u2
Financial Instruments
9 Months Ended
Oct. 31, 2019
Investments, Debt and Equity Securities [Abstract]  
Financial Instruments Financial Instruments 
Fair Value Measurements
We measure our cash equivalents, marketable securities, and restricted cash at fair value on a recurring basis. We define fair value as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

Level 1 - Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2 - Observable inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments; and

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on our own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation.
We classify our cash equivalents, marketable securities and restricted cash within Level 1 or Level 2 because they are valued using either quoted market prices or inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. Our fixed income available-for-sale securities consist of high quality, investment grade securities from diverse issuers. The valuation techniques used to measure the fair value of our marketable securities were derived from non-binding market consensus prices that are corroborated by observable market data or quoted market prices for similar instruments.
In addition to our cash equivalents, marketable securities and restricted cash, we measure the fair value of our convertible senior notes (the Notes) on a quarterly basis for disclosure purposes. We consider the fair value of the Notes at October 31, 2019 to be a Level 2 measurement due to its limited trading activity. Refer to Note 6 for the carrying amount and estimated fair value of our Notes as of October 31, 2019.
Cash Equivalents, Marketable Securities and Restricted Cash
The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories as of January 31, 2019 and October 31, 2019 (in thousands):
 
 As of January 31, 2019
 Amortized
Cost
Gross Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
Cash EquivalentsMarketable SecuritiesRestricted Cash
Level 1      
Money market accounts$—  $—  $—  $43,038  $27,215  $—  $15,823  
Level 2      
U.S. government treasury notes315,329  208  (315) 315,222  34,129  281,093  —  
U.S. government agencies69,114  17  (154) 68,977  9,983  58,994  —  
Corporate debt securities363,860  534  (757) 363,637  —  363,637  —  
Foreign government bonds7,965  36  —  8,001  —  8,001  —  
Asset-backed securities37,664  105  (12) 37,757  —  37,757  —  
Total$793,932  $900  $(1,238) $836,632  $71,327  $749,482  $15,823  

 As of October 31, 2019
 Amortized
Cost
Gross Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
Cash EquivalentsMarketable
Securities
Restricted Cash
Level 1
Money market accounts$—  $—  $—  $20,372  $5,085  $—  $15,287  
Level 2       
U.S. government treasury notes350,325  2,165  (30) 352,460  —  352,460  —  
U.S. government agencies42,120  331  (1) 42,450  —  42,450  —  
Corporate debt securities436,842  3,800  (10) 440,632  2,361  438,271  —  
Foreign government bonds14,988  131  (5) 15,114  —  15,114  —  
Asset-backed securities88,222  466  (14) 88,674  —  88,674  —  
Total$932,497  $6,893  $(60) $959,702  $7,446  $936,969  $15,287  
 
The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):

 As of October 31, 2019
 Amortized CostFair Value
Due within one year$427,200  $429,154  
Due in one to five years502,936  507,815  
Total$930,136  $936,969  
 
Based on our evaluation of available evidence, we concluded that the gross unrealized losses on our investments as of October 31, 2019 were temporary in nature. The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position as of October 31, 2019, aggregated by investment category (in thousands):
 
 Less than 12 monthsGreater than 12 monthsTotal
 Fair
Value
Unrealized
Loss
Fair
Value
Unrealized
Loss
Fair
Value
Unrealized
Loss
U.S. government treasury notes$23,968  $(27) $3,623  $(3) $27,591  $(30) 
U.S. government agencies—  —  1,938  (1) 1,938  (1) 
Corporate debt securities11,532  (7) 10,366  (3) 21,898  (10) 
Foreign government bonds2,964  (5) —  —  2,964  (5) 
Asset-backed securities16,130  (14) —  —  16,130  (14) 
Total$54,594  $(53) $15,927  $(7) $70,521  $(60) 
 
Realized gains or losses on sale of marketable securities were not significant for all periods presented.
v3.19.3.a.u2
Business Combination
9 Months Ended
Oct. 31, 2019
Business Combinations [Abstract]  
Business Combination Business Combination
In April 2019, we acquired Compuverde AB (Compuverde), a privately-held developer of file software solutions for enterprises and cloud providers based in Sweden. Acquisition-related costs were $0.5 million and expensed as incurred.
The purchase consideration was $47.9 million in cash (net of cash acquired) after repayment of $11.6 million of debt assumed. The purchase price was allocated as follows: $38.4 million in developed technology which will be amortized over seven years, $25.4 million of goodwill, $10.2 million in net liabilities assumed, and $5.7 million in deferred tax liability. The deferred tax liability was primarily a result of the difference in the book basis and tax basis related to the developed technology. Goodwill is primarily attributable to the assembled workforce and synergies from integrating Compuverde's technology with our data platform to expand our file capabilities and is not expected to be deductible for tax purposes.
In addition, cash payments to former shareholders of Compuverde totaling $15.9 million are to be made over a two-year period and recognized as operating expense.
Restricted stock units in the amount of $3.0 million were issued to Compuverde employees in June 2019, subject to continuous employment and will be recognized as stock-based compensation over the related vesting period.
The results of Compuverde are included in our condensed consolidated statements of operations since the acquisition date, including revenue and net loss, and are not material. Pro forma results of operations have not been presented because the acquisition is not material to our results of operations.
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Balance Sheet Components
9 Months Ended
Oct. 31, 2019
Balance Sheet Components Disclosure [Abstract]  
Balance Sheet Components Balance Sheet Components
Inventory
Inventory consists of the following (in thousands):
As of January 31, 2019As of October 31, 2019
Raw materials$3,349  $3,163  
Finished goods41,338  36,688  
Inventory$44,687  $39,851  
Property and Equipment, Net
Property and equipment, net consists of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Test equipment$170,930  $199,878  
Computer equipment and software117,330  139,188  
Furniture and fixtures6,980  8,483  
Leasehold improvements34,286  40,235  
Total property and equipment329,526  387,784  
Less: accumulated depreciation and amortization(204,173) (257,548) 
Property and equipment, net$125,353  $130,236  
 
Depreciation and amortization expense was $16.9 million and $20.6 million for the three months ended October 31, 2018 and 2019, and $49.8 million and $60.3 million for the nine months ended October 31, 2018 and 2019.
Intangible Assets, Net
Intangible assets, net consist of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Gross Carrying ValueAccumulated AmortizationNet Carrying AmountGross Carrying ValueAccumulated AmortizationNet Carrying Amount
Technology patents$10,125  $(6,572) $3,553  $19,125  $(8,235) $10,890  
Developed technology17,700  (1,135) 16,565  56,100  (5,962) 50,138  
Intangible assets, net$27,825  $(7,707) $20,118  $75,225  $(14,197) $61,028  
 
Intangible assets amortization expense was $0.9 million and $2.6 million for the three months ended October 31, 2018 and 2019, and $1.6 million and $6.5 million for the nine months ended October 31, 2018 and 2019. As of October 31, 2019, the weighted-average remaining amortization period was 4.0 years for technology patents and 6.2 years for developed technology. Amortization of the technology patents is included in general and administrative expenses due to their defensive nature and amortization of developed technology is included in cost of product revenue in the condensed consolidated statements of operations.
As of October 31, 2019, future expected amortization expense for intangible assets is as follows (in thousands):
 
Fiscal Years Ending January 31,Estimated 
Future
Amortization
Expense
Remainder of 2020$2,771  
202110,804  
20229,846  
20239,300  
20249,300  
Thereafter19,007  
Total$61,028  
Goodwill
The change in the carrying amount of goodwill is as follows (in thousands):
Amount
Balance as of January 31, 2019$10,997  
Goodwill acquired25,423  
Balance as of October 31, 2019$36,420  
Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consist of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Taxes payable $7,146  $10,579  
Accrued marketing6,173  10,159  
Accrued travel and entertainment expenses3,570  3,054  
Acquisition consideration held back3,725  —  
Other accrued liabilities19,246  24,431  
Total accrued expenses and other liabilities$39,860  $48,223  
v3.19.3.a.u2
Convertible Senior Notes
9 Months Ended
Oct. 31, 2019
Debt Disclosure [Abstract]  
Convertible Senior Notes Convertible Senior Notes
In April 2018, we issued $575.0 million in principal amount of 0.125% convertible senior notes due 2023, in a private placement to qualified institutional buyers pursuant to Rule 144A under the Securities Act and received proceeds of $562.1 million, after deducting the underwriters’ discounts and commissions. The Notes are governed by an indenture (the Indenture) between us, as the issuer, and U.S. Bank National Association, as trustee. The Notes are our senior unsecured obligations. The Indenture does not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness, or the issuance or repurchase of securities by us or any of our subsidiaries. The Notes mature on April 15, 2023 unless repurchased or redeemed by us or converted in accordance with their terms prior to the maturity date. Interest is payable semi-annually in arrears on April 15 and October 15 of each year, beginning on October 15, 2018.

The Notes are convertible for up to 21,884,155 shares of our common stock at an initial conversion rate of approximately 38.0594 shares of Class A common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $26.27 per share of Class A common stock, subject to adjustment. Holders of the
Notes may surrender their Notes for conversion at their option at any time prior to the close of business on the business day immediately preceding October 15, 2022, only under the following circumstances:

during any fiscal quarter commencing after the fiscal quarter ended on July 31, 2018 (and only during such fiscal quarter), if the last reported sale price of our Class A common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on, and including, the last trading day of the immediately preceding fiscal quarter is greater than or equal to 130% of the conversion price for the Notes on each applicable trading day;

during the five business day period after any 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 of our Class A common stock and the conversion rate for the Notes on each such trading day;

if we call any or all of the Notes for redemption, at any time prior to the close of business on the second scheduled trading day immediately preceding the redemption date; or

upon the occurrence of specified corporate events.

On or after October 15, 2022 until the close of business on the second scheduled trading day immediately preceding the maturity date, holders may convert all or any portion of their Notes at any time regardless of the foregoing circumstances. Upon conversion, holders will receive cash, shares of our Class A common stock, or a combination of cash and shares of our Class A common stock, at our election. We intend to settle the principal of the Notes in cash.

The conversion price will be subject to adjustment in some events. Following certain corporate events that occur prior to the maturity date or following our issuance of a notice of redemption, we will increase the conversion rate for a holder who elects to convert its Notes in connection with such corporate event or during the related redemption period in certain circumstances. Additionally, upon the occurrence of a corporate event that constitutes a “fundamental change” per the Indenture, holders of the Notes may require us to repurchase for cash all or a portion of the Notes at a purchase price equal to 100% of the principal amount of the Notes plus accrued and unpaid contingent interest.

We may not redeem the Notes prior to April 20, 2021. We may redeem for cash all or any portion of the Notes, at our option, on or after April 20, 2021 if the last reported sale price of our Class A common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending not more than two trading days immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. No sinking fund is provided for the Notes.

In accounting for the issuance of the Notes, we separated the Notes into liability and equity components. The carrying amount of the liability component was determined by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was calculated by deducting the fair value of the liability component from the principal amount of the Notes as a whole. The difference between the principal amount of the Notes and the liability component (the debt discount) is amortized to interest expense in the condensed consolidated statements of operations using the effective interest method over the term of the Notes. The equity component of the Notes is included in additional paid-in capital in the condensed consolidated balance sheets and is not remeasured as long as it continues to meet the conditions for equity classification.

In accounting for the transaction costs related to the issuance of the Notes, we allocated the total amount incurred to the liability and equity components using the same proportions as the initial carrying value of the Notes. Transaction costs attributable to the liability component were netted with the principal amount of the Notes in the
condensed consolidated balance sheets and are being amortized to interest expense in the condensed consolidated statements of operations using the effective interest method over the term of the Notes. Transaction costs attributable to the equity component were netted with the equity component of the Notes in additional paid-in capital in the condensed consolidated balance sheets. Upon the issuance of the Notes, we recorded total debt issuance costs of $12.9 million, of which $9.8 million was allocated to the Notes and $3.1 million was allocated to additional paid-in capital.

The Notes consisted of the following (in thousands):
As of October 31, 2019
Liability:
Principal$575,000  
Less: debt discount, net of amortization(97,898) 
Less: debt issuance costs, net of amortization(7,088) 
Net carrying amount of the Notes$470,014  
Stockholders' equity:
Allocated value of the conversion feature$136,333  
Less: debt issuance costs(3,068) 
Additional paid-in capital$133,265  

The total estimated fair value of the Notes as of October 31, 2019 was $602.8 million. The fair value was determined based on the closing trading price per $100 of the Notes as of the last day of trading for the period. The fair value of the Notes is primarily affected by the trading price of our common stock and market interest rates. Based on the closing price of our Class A common stock of $19.46 on October 31, 2019, the if-converted value of the Notes of $425.9 million was less than its principal amount.

The following table sets forth total interest expense recognized related to the Notes for three and nine months ended October 31, 2018 and 2019 (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Amortization of debt discount$6,084  $6,431  $13,441  $18,824  
Amortization of debt issuance costs441  465  973  1,362  
Total amortization of debt discount and debt issuance costs6,525  6,896  14,414  20,186  
Contractual interest expense181  181  405  539  
Total interest expense related to the Notes$6,706  $7,077  $14,819  $20,725  
Effective interest rate of the liability component5.6 %5.6 %5.6 %5.6 %

In connection with the offering of the Notes, we paid $64.6 million to enter into capped call transactions with certain of the underwriters and their affiliates (the Capped Calls), whereby we have the option to purchase a total of 21,884,155 shares of our Class A common stock upon any conversion of Notes and/or offset any cash payments we are required to make in excess of the principal amount of the Notes, as the case may be, with such reduction or offset subject to a cap initially equal to $39.66 per share (which represents a premium of 100% over the last reported sales price of our Class A common stock on April 4, 2018), subject to certain adjustments (the Cap Price). The cost of the Capped Calls was accounted for as a reduction to additional paid-in capital on the condensed
consolidated balance sheet. The Capped Calls are intended to reduce or offset potential dilution of our common stock upon any conversion of the Notes, subject to a cap based on the Cap Price.

Impact on Earnings Per Share
The Notes will not impact our diluted earnings per share until the average market price of our Class A common stock exceeds the conversion price of $26.27 per share, as we intend to settle the principal amount of the Notes in cash upon conversion. We are required under the treasury stock method to compute the potentially dilutive shares of common stock related to the Notes for periods we report net income. However, upon conversion, there will be no economic dilution from the Notes until the average market price of our Class A common stock exceeds the Cap Price of $39.66 per share, as exercise of the Capped Calls offsets any dilution from the Notes from the conversion price up to the Cap Price. Capped Calls are excluded from the calculation of diluted earnings per share, as they would be anti-dilutive under the treasury stock method.
v3.19.3.a.u2
Commitments and Contingencies
9 Months Ended
Oct. 31, 2019
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies Commitments and Contingencies
Operating Leases

As of October 31, 2019, we have various non-cancelable operating lease commitments for office facilities which as a result of the adoption of ASC 842, have been recorded as operating lease liabilities on our condensed consolidated balance sheet. Refer to Note 8—Leases for additional information regarding lease commitments.

Convertible Notes

The repayment of our Notes with an aggregate principal amount of $575.0 million is due on April 15, 2023. Refer to Note 6 for further information regarding our Notes.
Letters of Credit
In connection with a lease executed in January 2019, we issued a letter of credit of $0.5 million. As of January 31, 2019 and October 31, 2019, we had outstanding letters of credit in the aggregate amount of $10.8 million and $11.5 million, in connection with our facility leases. The letters of credit are collateralized by restricted cash and mature on various dates through August 2029.
Legal Matters
From time to time, we have become involved in claims and other legal matters arising in the normal course of business. We investigate these claims as they arise. Although claims are inherently unpredictable, we currently are not aware of any matters that we expect to have a material adverse effect on our business, financial position, results of operations or cash flows. Accordingly, we have not recorded any loss contingency on our condensed consolidated balance sheet as of October 31, 2019.
Indemnification
Our arrangements generally include certain provisions for indemnifying customers against liabilities if our products or services infringe a third party’s intellectual property rights. Other guarantees or indemnification arrangements include guarantees of product and service performance and standby letters of credit for lease facilities. It is not possible to determine the maximum potential amount under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. To date, we have not incurred any material costs as a result of such obligations and have not accrued any liabilities related to such obligations in the condensed consolidated financial statements. In addition, we indemnify our officers, directors and certain key employees while they are serving in good faith in their respective capacities. To date, there have been no claims under any indemnification provisions.
v3.19.3.a.u2
Leases
9 Months Ended
Oct. 31, 2019
Leases [Abstract]  
Leases Leases
We lease office facilities under non-cancelable operating lease agreements expiring through July 2032. Our lease agreements do not contain any material residual value guarantees or restrictive covenants. During the three months ended October 31, 2019, we amended an existing office facility lease to extend the lease term and add additional office space resulting in additional lease payments of $19.4 million. The components of lease costs were as follows (in thousands):
Three Months EndedNine Months Ended
October 31, 2019October 31, 2019
Fixed operating lease cost$8,509  $25,220  
Variable lease cost (1)
2,122  6,464  
Short-term lease cost (12 months or less)1,412  3,757  
Total lease cost$12,043  $35,441  
——————————
(1) Variable lease cost for the three and nine months ended October 31, 2019 predominantly includes common area maintenance charges.

Future lease payments under our non-cancelable operating leases as of October 31, 2019 were as follows (in thousands):
Fiscal Years Ending January 31,Operating Leases
The remainder of 2020$8,359  
202134,411  
202228,489  
202323,507  
202417,782  
Thereafter42,051  
Total future lease payments154,599  
Less: imputed interest(28,002) 
Present value of lease liabilities$126,597  

Future lease payments in the above table do not include a facility operating lease that has not commenced with undiscounted cash flows of $7.9 million. This lease will commence in fiscal year 2021 with a lease term of 12.4 years.

Supplemental cash flow information related to our operating leases for the nine months ended October 31, 2019 as well as the weighted-average remaining lease term and weighted-average discount rate as of October 31, 2019 were as follows:
Cash paid for amounts included in the measurement of lease liabilities (in thousands)$24,403  
Operating lease right-of-use assets obtained in exchange for operating lease liabilities$14,937  
Weighted-average remaining lease term (years)5.71
Weighted-average discount rate6.52 %

As previously disclosed in our Annual Report on Form 10-K for the year ended January 31, 2019 and under the previous lease accounting standard, ASC 840, Leases, the following table summarizes the future minimum lease payments due under operating leases as of January 31, 2019 (in thousands):
Year Ending January 31,Operating Leases
2020$31,297  
202128,573  
202224,381  
202320,440  
202414,780  
Thereafter30,096  
Total$149,567  
v3.19.3.a.u2
Stockholders' Equity
9 Months Ended
Oct. 31, 2019
Equity [Abstract]  
Stockholders' Equity Stockholders’ Equity
Preferred Stock
We have 20,000,000 authorized shares of undesignated preferred stock, the rights, preferences and privileges of which may be designated from time to time by our board of directors. As of October 31, 2019, there were no shares of preferred stock issued or outstanding.
Class A and Class B Common Stock
We have two classes of authorized common stock, Class A common stock and Class B common stock. As of October 31, 2019, we had 2,000,000,000 authorized shares of Class A common stock and 250,000,000 authorized shares of Class B common stock, with each class having a par value of $0.0001 per share. As of October 31, 2019, 259,920,406 shares of Class A common stock were issued and outstanding.
Common Stock Repurchase Program
In August 2019, our board of directors approved the repurchase of up to $150.0 million of our Class A common stock. The authorization allows us to repurchase shares of our Class A common stock opportunistically and will be funded from available working capital. Repurchases may be made at management’s discretion from time to time on the open market through privately negotiated transactions, transactions structured through investment banking institutions, block purchase techniques, 10b5-1 trading plans, or a combination of the foregoing. The repurchase program does not obligate us to acquire any of our common stock, has no end date, and may be suspended or discontinued by us at any time without prior notice. During the three months ended October 31, 2019, there were no repurchases of common stock.
Repurchase of Common Stock in connection with the Notes
Concurrent with the issuance of the Notes (see Note 6), we repurchased and retired 1,008,573 shares, or $20.0 million, of our Class A common stock at $19.83 per share, which was equal to the closing price per share of our Class A common stock on April 4, 2018, the date of the pricing of the offering of the Notes. The repurchased shares were recorded as a reduction of additional paid-in capital on the condensed consolidated balance sheet.
v3.19.3.a.u2
Equity Incentive Plans
9 Months Ended
Oct. 31, 2019
Share-based Payment Arrangement [Abstract]  
Equity Incentive Plans Equity Incentive Plans
Equity Incentive Plans
We maintain two equity incentive plans: the 2009 Equity Incentive Plan (the 2009 Plan) and the 2015 Equity Incentive Plan (the 2015 Plan). The 2015 Plan became effective in connection with our initial public offering (IPO) in October 2015 and serves as the successor to our 2009 Plan. The 2015 Plan provides for grants of incentive stock options to our employees and non-statutory stock options, stock appreciation rights, restricted stock, restricted stock unit awards (RSUs), performance stock awards, performance cash awards, and other forms of stock awards to our employees, directors and consultants. No new awards have been issued under our 2009 Plan after the effective date of our 2015 Plan. Outstanding awards granted under our 2009 Plan will remain subject to the terms of our 2009 Plan and applicable award agreements, until such outstanding awards that are stock options are exercised, terminated or expired by their terms.

Starting in December 2018, we net-share settle equity awards held by certain employees by withholding shares upon vesting to satisfy tax withholding obligations. The shares withheld to satisfy employee tax withholding obligations are returned to our 2015 Plan and will be available for future issuance. Payments for employees’ tax obligations to the tax authorities are recognized as a reduction to additional paid-in capital and reflected as a financing activity in our condensed consolidated statements of cash flows.
The exercise price of stock options will generally not be less than 100% of the fair market value of our common stock on the date of grant, as determined by our board of directors. Our equity awards generally vest over a two to four year period and expire no later than ten years from the date of grant.  

2015 Employee Stock Purchase Plan
Our 2015 Employee Stock Purchase Plan (2015 ESPP) became effective in connection with our IPO.
The 2015 ESPP allows eligible employees to purchase shares of our Class A common stock at a discount through payroll deductions of up to 30% of their eligible compensation, subject to a cap of 3,000 shares on any purchase date or $25,000 in any calendar year (as determined under applicable tax rules). In February 2019, we amended the ESPP on a prospective basis, to include an additional dollar cap of $7,500 per purchase period. The 2015 ESPP provides for a 24-month offering period beginning March 16th and September 16th of each year, and each offering period consists of four 6 months purchase periods, subject to a reset provision. If the closing stock price on the offering date of a new offering falls below the closing stock price on the offering date of an ongoing offering, the ongoing offering would terminate immediately following the purchase of ESPP shares on the purchase date immediately preceding the new offering and participants in the terminated ongoing offering would automatically be enrolled in the new offering (ESPP reset), resulting in a modification. On each purchase date, eligible employees will purchase our Class A common stock at a price per share equal to 85% of the lesser of the fair market value of our Class A common stock (1) on the first trading day of the applicable offering period or (2) the purchase date. During the three months ended October 31, 2019, there was an ESPP reset that resulted in a modification charge of $11.4 million, which is recognized over the new offering period ending September 15, 2021.
We recognized stock-based compensation expense related to our 2015 ESPP of $11.6 million and $4.3 million during the three months ended October 31, 2018 and 2019 and $26.2 million and $20.0 million during the nine months ended October 31, 2018 and 2019. As of October 31, 2019, total unrecognized stock-based compensation cost related to 2015 ESPP was $33.1 million, which is expected to be recognized over a weighted-average period of 1.9 years.
Stock Options
A summary of stock option activity under our equity incentive plans and related information is as follows:
 
 Options Outstanding
 Number of
Shares
Weighted-
Average
Exercise Price
Weighted-
Average
Remaining
Contractual Life (In Years)
Aggregate
Intrinsic
Value (in thousands)
Balance as of January 31, 201935,465,543  $8.34  5.4$339,591  
Options exercised(4,797,359) 5.42    
Options forfeited/canceled(468,544) 15.78    
Balance as of October 31, 201930,199,640  $8.69  3.9$325,184  
Vested and exercisable as of October 31, 201925,550,655  $7.71  4.6$300,257  
 
 
The aggregate intrinsic value of options vested and exercisable as of October 31, 2019 is calculated based on the difference between the exercise price and the closing price of $19.46 of our Class A common stock on October 31, 2019.
As of October 31, 2019, total unrecognized employee compensation cost related to outstanding options was $15.0 million, which is expected to be recognized over a weighted-average period of 1.5 years.

RSUs
A summary of the RSU activity under our 2015 Plan and related information is as follows:
 Number of RSUs OutstandingWeighted-
Average
Grant Date
Fair Value
Aggregate
Intrinsic
Value (in thousands)
Unvested balance as of January 31, 201921,917,550  $17.94  $392,515  
Granted10,889,807  19.35  
Vested(6,910,339) 17.21  
Forfeited(2,239,739) 18.76  
Unvested balance as of October 31, 201923,657,279  $18.72  $460,371  

During the three months ended October 31, 2018 and 2019, we recognized $31.2 million and $41.0 million in stock-based compensation expense relating to RSUs. During the nine months ended October 31, 2018 and 2019, we recognized $87.1 million and $118.7 million in stock-based compensation expense relating to RSUs. As of October 31, 2019, total unrecognized employee compensation cost related to unvested RSUs was $405.8 million, which is expected to be recognized over a weighted-average period of 2.9 years.
Restricted Stock
In January 2019, we issued 183,902 shares of performance restricted stock, at a target percentage of 100%, with both performance and service vesting conditions payable in common shares, from 0% to 160%, of the target number granted, contingent upon the degree to which the performance condition is met. The grant date for these shares was subsequently established when the performance condition was determined in March 2019. Any portion of shares that are not earned will be canceled.
During the nine months ended October 31, 2019, we issued 1,291,194 shares of performance restricted stock, at a target percentage of 100%, with both performance and service vesting conditions payable in common shares, from 0% to 160%, of the target number granted, contingent upon the degree to which the performance condition is met. Any portion of shares that are not earned will be canceled. During the nine months ended
October 31, 2019, we also issued 108,494 shares of additional restricted stock earned based on the actual attainment of previously issued performance restricted stock awards.

A summary of the restricted stock activity under our 2015 Plan and related information is as follows:
 Number of Restricted Stock OutstandingWeighted-
Average
Grant Date
Fair Value
Aggregate
Intrinsic
Value (in thousands)
Unvested balance as of January 31, 20192,267,569  $18.70  $40,612  
Granted1,399,688  20.30  
Vested(1,063,977) 19.32  
Unvested balance as of October 31, 20192,603,280  $19.42  $50,660  

All unvested restricted shares are subject to cancellation to the extent vesting conditions are not met. During the three months ended October 31, 2018 and 2019, we recognized $7.5 million and $4.4 million in stock-based compensation expense relating to restricted stock. During the nine months ended October 31, 2018 and 2019, we recognized $17.7 million and $19.2 million in stock-based compensation expense relating to restricted stock. As of October 31, 2019, total unrecognized employee compensation cost related to unvested restricted stock was $21.5 million, which is expected to be recognized over a weighted-average period of 2.1 years.
Stock-Based Compensation Expense
The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Cost of revenue—product$862  $912  $2,190  $2,843  
Cost of revenue—support subscription3,327  3,517  8,940  11,101  
Research and development (1)
24,634  27,827  67,956  85,180  
Sales and marketing18,681  16,802  49,890  51,171  
General and administrative10,825  5,171  26,962  24,495  
Total stock-based compensation expense$58,329  $54,229  $155,938  $174,790  
____________________________________
 
(1) Included in the three and nine months ended October 31, 2019 were $1.9 million and $4.2 million in deferred payments related to the Compuverde acquisition. See Note 4 for further details.

The tax benefit related to stock-based compensation expense for all periods presented was not material.
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Net Loss per Share Attributable to Common Stockholders
9 Months Ended
Oct. 31, 2019
Earnings Per Share [Abstract]  
Net Loss per Share Attributable to Common Stockholders Net Loss per Share Attributable to Common Stockholders
Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities.
Basic net loss per share attributable to common stockholders is computed by dividing the net loss attributable to common stockholders by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. Diluted net loss per share attributable to common stockholders is computed by giving effect to all potentially dilutive common stock equivalents, including our outstanding stock options, common stock related to unvested RSUs, repurchasable shares from early exercised stock options and restricted stock, our Notes to the extent dilutive, and common stock issuable pursuant to the ESPP. These potentially dilutive common stock equivalents have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive.
The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Net loss$(28,180) $(29,982) $(152,607) $(196,336) 
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted235,205  255,047  229,505  250,618  
Net loss per share attributable to common stockholders, basic and diluted$(0.12) $(0.12) $(0.66) $(0.78) 

The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Stock options to purchase common stock37,814  30,769  41,201  32,150  
Unvested RSUs19,493  24,251  19,488  24,544  
Restricted stock and early exercised stock options subject to repurchase3,277  2,732  2,938  2,762  
Shares related to Notes21,884  21,884  16,513  21,884  
Shares issuable pursuant to ESPP236  571  80  571  
Total82,704  80,207  80,220  81,911  
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Other Income (Expense), Net
9 Months Ended
Oct. 31, 2019
Other Income and Expenses [Abstract]  
Other Income (Expense), Net Other Income (Expense), Net
Other income (expense), net consists of the following (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Interest income (1)$5,497  $6,770  $12,151  $20,376  
Interest expense (2)(6,706) (7,077) (14,819) (20,725) 
Foreign currency transactions gains (losses)(1,667) 97  (6,074) (2,329) 
Other income (expense)(13) 219  822  219  
Total other income (expense), net$(2,889) $ $(7,920) $(2,459) 
____________________________________

(1) Interest income includes interest income related to our cash, cash equivalents and marketable securities and non-cash interest income (expense) related to accretion (amortization) of the discount (premium) on marketable securities.

(2) Interest expense includes non-cash interest expense related to amortization of the debt discount and debt issuance costs and the contractual interest expense related to the Notes.
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Income Taxes
9 Months Ended
Oct. 31, 2019
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
Our income tax provision was primarily due to taxes on international operations and state income taxes. The difference between the income tax provision that would be derived by applying the statutory rate to our loss before income taxes and the income tax provision recorded was primarily attributable to changes in our valuation allowance, non-deductible stock-based compensation expense and the tax rate differential between the U.S. and foreign countries.
As of October 31, 2019, there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for the year ended January 31, 2019.
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Segment Information
9 Months Ended
Oct. 31, 2019
Segment Reporting [Abstract]  
Segment Information Segment Information
Our chief operating decision maker is a group comprised of our Chief Executive Officer, our Chief Financial Officer, and our Chief Operating Officer. This group reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance. We have one business activity and there are no segment managers who are held accountable for operations or operating results. Accordingly, we have a single reportable segment.

Disaggregation of Revenue
The following table depicts the disaggregation of revenue by geographic area based on the billing address of our customers and is consistent with how we evaluate our financial performance (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
United States$263,488  $312,010  $678,166  $835,545  
Rest of the world109,291  116,399  259,442  315,891  
Total revenue$372,779  $428,409  $937,608  $1,151,436  
Long-lived Assets by Geographic Area
Long-lived assets, which are comprised of property and equipment, net, by geographic area are summarized as follows (in thousands):
 
 As of January 31, 2019As of October 31, 2019
United States$120,876  $119,920  
Rest of the world4,477  10,316  
Total long-lived assets$125,353  $130,236  
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Basis of Presentation and Summary of Significant Accounting Policies - (Policies)
9 Months Ended
Oct. 31, 2019
Accounting Policies [Abstract]  
Principles of Consolidation
Principles of Consolidation
The condensed consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Unaudited Interim Consolidated Financial Information
Unaudited Interim Consolidated Financial Information
The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the year ended January 31, 2019.
In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2020 or any future period.
Use of Estimates
Use of Estimates
The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates. Such estimates include, but are not limited to, the determination of standalone selling price for revenue arrangements with multiple performance obligations, useful lives of intangible assets, property and equipment, the period of benefit for deferred contract costs for commissions, stock-based compensation, provision for income taxes including related reserves, valuation of intangible assets and goodwill, the incremental borrowing rate we use to determine our operating lease liabilities. Management bases its estimates on historical experience and on various other assumptions which management believes to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Restricted Cash Restricted Cash Restricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program.
Marketable Securities
Marketable Securities
We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses, in accumulated other comprehensive income (loss), which is reflected as a component of stockholders’ equity. We evaluate our securities to assess whether those with unrealized loss positions are other than temporarily impaired. We consider impairments to be other than temporary if they are related to deterioration in credit risk or if it is likely we will sell the securities before the recovery of their cost basis. Realized gains and losses from the sale of marketable securities and declines in value deemed to be other than temporary are determined on the specific identification method. To date, there have been no declines in value deemed to be other than temporary in any of our securities. Realized gains and losses are reported in other income (expense), net in the condensed consolidated statements of operations.
Business Combinations Business CombinationsWe allocate the purchase price to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase price over the fair values of the assets acquired and liabilities assumed is recorded as goodwill. During the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the estimated fair value of the assets acquired and liabilities assumed, with the corresponding offset to goodwill. The results of operations of an acquired business is included in our condensed consolidated financial statements from the date of acquisition. Acquisition-related expenses are expensed as incurred.
Deferred Commissions Deferred CommissionsDeferred commissions consist of incremental costs paid to our sales force to obtain customer contracts. Deferred commissions related to product revenue are recognized upon transfer of control to customers and deferred commissions related to support subscription revenue are amortized over an expected useful life of six years. We determine the expected useful life based on an estimated benefit period by evaluating our technology development life cycle, expected customer relationship period and other factors. We classify deferred commissions as current and non-current on our condensed consolidated balance sheets based on the timing of when we expect to recognize the expense. Amortization of deferred commissions is included in sales and marketing expense in the condensed consolidated statements of operations.
Operating Leases
Operating Leases

We determine if an arrangement contains a lease at inception. Lease liabilities are recognized at the present value of the future lease payments at commencement date. The interest rate implicit in our operating leases is not readily determinable, and therefore an incremental borrowing rate is estimated to determine the present value of future payments. The estimated incremental borrowing rate factors in a hypothetical interest rate on a collateralized basis with similar terms, payments, and economic environments. The operating lease right-of-use (ROU) asset is determined based on the lease liability initially established and reduced for any prepaid lease payments and any lease incentives. We have elected to not allocate the contract consideration for operating lease contracts with lease and non-lease components, and account for the lease and non-lease components as a single lease component.

Certain of the operating lease agreements contain rent concession, rent escalation, and option to renew provisions. Rent concession and rent escalation provisions are considered in determining the lease cost. Lease cost is recognized on a straight-line basis over the lease term commencing on the date we have the right to use the leased property. We generally use the base, non-cancelable, lease term when recognizing the lease assets and liabilities, unless it is reasonably certain that an extension or termination option will be exercised.

In addition, certain of our operating lease agreements contain tenant improvement allowances from our landlords. These allowances are accounted for as lease incentives and reduce our ROU asset and lease cost over the lease term.

For short-term leases with lease term no longer than twelve months, and do not include an option to purchase the underlying asset that we are reasonably certain to exercise, we recognize rent expense in our condensed consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred.
Deferred Revenue and Revenue Recognition
Deferred Revenue
Deferred revenue primarily consists of amounts that have been invoiced but that have not yet been recognized as revenue and performance obligations pertaining to support subscription services. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the condensed consolidated balance sheet dates.
Revenue Recognition
We derive revenue from two sources: (1) product revenue which includes hardware and embedded software and (2) support subscription revenue which includes customer support, hardware maintenance, and software upgrades on a when-and-if-available basis. Support subscription revenue also includes our Pure as-a-Service offerings, including the offering formerly known as Evergreen Storage Service (ES2).
Our product revenue is derived from the sale of storage hardware and operating system software that is integrated into the hardware. We typically recognize product revenue upon transfer of control to our customers. Products are typically shipped directly by us to customers, and our channel partners do not stock our inventory.
Our support subscription revenue is derived from the sale of support subscription, which includes the right to receive unspecified software upgrades and enhancements on a when-and-if-available basis, bug fixes, parts replacement services related to the hardware, as well as access to our cloud-based management and support platform. Support subscription revenue is also derived from the sale of our Pure as-a-Service offerings. Revenue related to support revenue is recognized ratably over the contractual term, which generally ranges from one to six years and represents our performance obligations period. The vast majority of our products are sold with support subscription agreements, which typically commence upon transfer of control of the corresponding products to our customers. Costs to service the support subscription are expensed as incurred. In addition, our Evergreen Storage program provides our customers who continually maintain active support subscription agreements for three years with an included controller refresh with each additional three year support subscription renewal. In accordance with revenue recognition guidance, the controller refresh represents an additional performance obligation and the allocated revenue is recognized in the period in which these controllers are shipped.
We recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration we expect to be entitled in exchange for those goods or services. This is achieved through applying the following five-step approach:
Identification of the contract, or contracts, with a customer
Identification of the performance obligations in the contract
Determination of the transaction price
Allocation of the transaction price to the performance obligations in the contract
Recognition of revenue when, or as, we satisfy a performance obligation
When applying this five-step approach, we apply judgment in determining the customer's ability and intention to pay, which is based on a variety of factors including the customer's historical payment experience and/or published credit and financial information pertaining to the customer. To the extent a customer contract includes multiple promised goods or services, we determine whether promised goods or services are capable of being distinct in the context of the contract to be accounted for as a separate performance obligation. The transaction price is determined based on the consideration which we will be entitled to in exchange for transferring goods or services to the customer. We allocate transaction price to each performance obligation for contracts that contain multiple performance obligations based on a relative standalone selling price which is determined based on the price at which the performance obligation is sold separately, or if not observable through past transactions, is estimated taking into account available information such as market conditions and internally approved pricing guidelines related to performance obligations.
Recently Adopted Accounting Pronouncements and Recent Accounting Pronouncements Not Yet Adopted
Recently Adopted Accounting Pronouncements
In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2016-02, Leases (ASC 842) and subsequent amendments to the initial guidance (collectively, Topic 842). ASC 842 requires lessees to generally recognize on its balance sheet operating and financing lease liabilities and corresponding ROU assets at the commencement date, and to recognize the associated lease expenses in the condensed consolidated statement of operations in a manner similar to that required under historical accounting rules.
On February 1, 2019, we adopted ASC 842 using the modified retrospective approach by electing to use the optional transition method which allows us to continue to apply the guidance of ASC 840, including disclosure requirements, in the comparative periods presented. We elected the package of transition expedients, which allowed us to carry forward our historical lease classifications, our assessment of whether any existing leases as of the date of adoption are or contain leases, and our assessment of indirect costs for any leases that existed prior to adoption of the new standard. We elected to take the practical expedient to keep leases with an initial term of 12 months or less off the condensed consolidated balance sheet and recognize the associated lease payments in the consolidated statements of operations on a straight-line basis over the lease term. We recognized operating ROU assets of $124.5 million and lease liabilities of $130.6 million on our condensed consolidated balance sheet as of February 1, 2019, which included reclassifying prepaid rent and deferred rent as a component of the ROU asset. Topic 842 did not have a material impact on our condensed consolidated statements of operations and cash flows. Refer to Note 8 for additional disclosures.
In February 2018, the FASB issued ASU No. 2018-02, Income Statement - Reporting Comprehensive Income (Topic 220) - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. This standard allows a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 and requires certain disclosures about stranded tax effects. We adopted this standard on February 1, 2019 and the adoption had no impact on our condensed consolidated financial statements.
Recent Accounting Pronouncements Not Yet Adopted
In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (ASU 2016-13). ASU 2016-13 amends guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities to require that credit losses on available-for-sale debt securities be presented as an allowance rather than as a write-down. The measurement of credit losses for newly recognized financial assets and subsequent changes in the allowance for credit losses are recorded in the statements of operations. The amendments in this update will be effective for us beginning on February 3, 2020. We do not believe the adoption of this standard will have a material impact to our condensed consolidated financial statements.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820), Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement (ASU 2018-13) which amended its conceptual framework to improve the effectiveness of disclosures in notes to financial statements. ASU 2018-13 eliminates such disclosures around the amount of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy. The guidance also adds new disclosure requirements for Level 3 measurements. ASU 2018-13 is effective for us beginning February 3, 2020. We do not believe this standard will have a material impact on our condensed consolidated financial statements.
In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40) - Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract (ASU 2018-15). ASC 2018-15 aligns the requirements for capitalizing implementation costs in a cloud computing arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This standard will be effective for us beginning February 3, 2020 and will be applied either retrospectively or prospectively. We plan to adopt this new accounting standard prospectively, and we do not expect the adoption will have a material impact on our condensed consolidated financial statements.
Fair Value Measurements
Fair Value Measurements
We measure our cash equivalents, marketable securities, and restricted cash at fair value on a recurring basis. We define fair value as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

Level 1 - Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities;

Level 2 - Observable inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments; and

Level 3 - Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. These inputs are based on our own assumptions used to measure assets and liabilities at fair value and require significant management judgment or estimation.
We classify our cash equivalents, marketable securities and restricted cash within Level 1 or Level 2 because they are valued using either quoted market prices or inputs other than quoted prices which are directly or indirectly observable in the market, including readily-available pricing sources for the identical underlying security which may not be actively traded. Our fixed income available-for-sale securities consist of high quality, investment grade securities from diverse issuers. The valuation techniques used to measure the fair value of our marketable securities were derived from non-binding market consensus prices that are corroborated by observable market data or quoted market prices for similar instruments.
In addition to our cash equivalents, marketable securities and restricted cash, we measure the fair value of our convertible senior notes (the Notes) on a quarterly basis for disclosure purposes. We consider the fair value of the Notes at October 31, 2019 to be a Level 2 measurement due to its limited trading activity. Refer to Note 6 for the carrying amount and estimated fair value of our Notes as of October 31, 2019
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Basis of Presentation and Summary of Significant Accounting Policies - (Tables)
9 Months Ended
Oct. 31, 2019
Accounting Policies [Abstract]  
Deferred Commissions
Changes in total deferred commissions during the periods presented are as follows (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Beginning balance (1)
$91,469  $118,568  $87,313  $114,973  
Additions31,884  34,071  71,887  82,381  
Recognition of deferred commissions(26,913) (29,508) (62,760) (74,223) 
Ending balance$96,440  $123,131  $96,440  $123,131  
____________________________________
 
(1) Balance as of January 31, 2018 was adjusted to reflect the adoption of ASC 606.
Deferred Revenue
Changes in total deferred revenue during the periods presented are as follows (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Beginning balance (1)
$413,247  $607,263  $374,102  $535,920  
Additions122,681  142,164  290,463  400,605  
Recognition of deferred revenue(74,740) (106,229) (203,377) (293,327) 
Ending balance$461,188  $643,198  $461,188  $643,198  
____________________________________
 
(1) Balance as of January 31, 2018 was adjusted to reflect the adoption of ASC 606.
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Financial Instruments - (Tables)
9 Months Ended
Oct. 31, 2019
Investments, Debt and Equity Securities [Abstract]  
Cash Equivalents, Marketable Securities and Restricted Cash
The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories as of January 31, 2019 and October 31, 2019 (in thousands):
 
 As of January 31, 2019
 Amortized
Cost
Gross Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
Cash EquivalentsMarketable SecuritiesRestricted Cash
Level 1      
Money market accounts$—  $—  $—  $43,038  $27,215  $—  $15,823  
Level 2      
U.S. government treasury notes315,329  208  (315) 315,222  34,129  281,093  —  
U.S. government agencies69,114  17  (154) 68,977  9,983  58,994  —  
Corporate debt securities363,860  534  (757) 363,637  —  363,637  —  
Foreign government bonds7,965  36  —  8,001  —  8,001  —  
Asset-backed securities37,664  105  (12) 37,757  —  37,757  —  
Total$793,932  $900  $(1,238) $836,632  $71,327  $749,482  $15,823  

 As of October 31, 2019
 Amortized
Cost
Gross Unrealized
Gains
Gross Unrealized
Losses
Fair
Value
Cash EquivalentsMarketable
Securities
Restricted Cash
Level 1
Money market accounts$—  $—  $—  $20,372  $5,085  $—  $15,287  
Level 2       
U.S. government treasury notes350,325  2,165  (30) 352,460  —  352,460  —  
U.S. government agencies42,120  331  (1) 42,450  —  42,450  —  
Corporate debt securities436,842  3,800  (10) 440,632  2,361  438,271  —  
Foreign government bonds14,988  131  (5) 15,114  —  15,114  —  
Asset-backed securities88,222  466  (14) 88,674  —  88,674  —  
Total$932,497  $6,893  $(60) $959,702  $7,446  $936,969  $15,287  
Amortized Cost and Estimated Fair Value
The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):

 As of October 31, 2019
 Amortized CostFair Value
Due within one year$427,200  $429,154  
Due in one to five years502,936  507,815  
Total$930,136  $936,969  
Gross Unrealized Losses and Fair Values The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position as of October 31, 2019, aggregated by investment category (in thousands):
 
 Less than 12 monthsGreater than 12 monthsTotal
 Fair
Value
Unrealized
Loss
Fair
Value
Unrealized
Loss
Fair
Value
Unrealized
Loss
U.S. government treasury notes$23,968  $(27) $3,623  $(3) $27,591  $(30) 
U.S. government agencies—  —  1,938  (1) 1,938  (1) 
Corporate debt securities11,532  (7) 10,366  (3) 21,898  (10) 
Foreign government bonds2,964  (5) —  —  2,964  (5) 
Asset-backed securities16,130  (14) —  —  16,130  (14) 
Total$54,594  $(53) $15,927  $(7) $70,521  $(60) 
v3.19.3.a.u2
Balance Sheet Components - (Tables)
9 Months Ended
Oct. 31, 2019
Balance Sheet Components Disclosure [Abstract]  
Inventory
Inventory consists of the following (in thousands):
As of January 31, 2019As of October 31, 2019
Raw materials$3,349  $3,163  
Finished goods41,338  36,688  
Inventory$44,687  $39,851  
Property and Equipment, Net
Property and equipment, net consists of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Test equipment$170,930  $199,878  
Computer equipment and software117,330  139,188  
Furniture and fixtures6,980  8,483  
Leasehold improvements34,286  40,235  
Total property and equipment329,526  387,784  
Less: accumulated depreciation and amortization(204,173) (257,548) 
Property and equipment, net$125,353  $130,236  
Intangible Assets, Net Intangible assets, net consist of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Gross Carrying ValueAccumulated AmortizationNet Carrying AmountGross Carrying ValueAccumulated AmortizationNet Carrying Amount
Technology patents$10,125  $(6,572) $3,553  $19,125  $(8,235) $10,890  
Developed technology17,700  (1,135) 16,565  56,100  (5,962) 50,138  
Intangible assets, net$27,825  $(7,707) $20,118  $75,225  $(14,197) $61,028  
Expected Amortization Expenses for Intangible Assets
As of October 31, 2019, future expected amortization expense for intangible assets is as follows (in thousands):
 
Fiscal Years Ending January 31,Estimated 
Future
Amortization
Expense
Remainder of 2020$2,771  
202110,804  
20229,846  
20239,300  
20249,300  
Thereafter19,007  
Total$61,028  
Goodwill
The change in the carrying amount of goodwill is as follows (in thousands):
Amount
Balance as of January 31, 2019$10,997  
Goodwill acquired25,423  
Balance as of October 31, 2019$36,420  
Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consist of the following (in thousands):
 
 As of January 31, 2019As of October 31, 2019
Taxes payable $7,146  $10,579  
Accrued marketing6,173  10,159  
Accrued travel and entertainment expenses3,570  3,054  
Acquisition consideration held back3,725  —  
Other accrued liabilities19,246  24,431  
Total accrued expenses and other liabilities$39,860  $48,223  
v3.19.3.a.u2
Convertible Senior Notes - (Tables)
9 Months Ended
Oct. 31, 2019
Debt Disclosure [Abstract]  
Convertible Debt
The Notes consisted of the following (in thousands):
As of October 31, 2019
Liability:
Principal$575,000  
Less: debt discount, net of amortization(97,898) 
Less: debt issuance costs, net of amortization(7,088) 
Net carrying amount of the Notes$470,014  
Stockholders' equity:
Allocated value of the conversion feature$136,333  
Less: debt issuance costs(3,068) 
Additional paid-in capital$133,265  
Interest Expense
The following table sets forth total interest expense recognized related to the Notes for three and nine months ended October 31, 2018 and 2019 (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Amortization of debt discount$6,084  $6,431  $13,441  $18,824  
Amortization of debt issuance costs441  465  973  1,362  
Total amortization of debt discount and debt issuance costs6,525  6,896  14,414  20,186  
Contractual interest expense181  181  405  539  
Total interest expense related to the Notes$6,706  $7,077  $14,819  $20,725  
Effective interest rate of the liability component5.6 %5.6 %5.6 %5.6 %
v3.19.3.a.u2
Leases - (Tables)
9 Months Ended
Oct. 31, 2019
Leases [Abstract]  
Lease costs The components of lease costs were as follows (in thousands):
Three Months EndedNine Months Ended
October 31, 2019October 31, 2019
Fixed operating lease cost$8,509  $25,220  
Variable lease cost (1)
2,122  6,464  
Short-term lease cost (12 months or less)1,412  3,757  
Total lease cost$12,043  $35,441  
——————————
(1) Variable lease cost for the three and nine months ended October 31, 2019 predominantly includes common area maintenance charges.
Future minimum lease payments
Future lease payments under our non-cancelable operating leases as of October 31, 2019 were as follows (in thousands):
Fiscal Years Ending January 31,Operating Leases
The remainder of 2020$8,359  
202134,411  
202228,489  
202323,507  
202417,782  
Thereafter42,051  
Total future lease payments154,599  
Less: imputed interest(28,002) 
Present value of lease liabilities$126,597  
Components Of Lease Cost
Supplemental cash flow information related to our operating leases for the nine months ended October 31, 2019 as well as the weighted-average remaining lease term and weighted-average discount rate as of October 31, 2019 were as follows:
Cash paid for amounts included in the measurement of lease liabilities (in thousands)$24,403  
Operating lease right-of-use assets obtained in exchange for operating lease liabilities$14,937  
Weighted-average remaining lease term (years)5.71
Weighted-average discount rate6.52 %
Schedule of future minimum rental payments for operating leases As previously disclosed in our Annual Report on Form 10-K for the year ended January 31, 2019 and under the previous lease accounting standard, ASC 840, Leases, the following table summarizes the future minimum lease payments due under operating leases as of January 31, 2019 (in thousands):
Year Ending January 31,Operating Leases
2020$31,297  
202128,573  
202224,381  
202320,440  
202414,780  
Thereafter30,096  
Total$149,567  
v3.19.3.a.u2
Equity Incentive Plans - (Tables)
9 Months Ended
Oct. 31, 2019
Share-based Payment Arrangement [Abstract]  
Equity Incentive Plans
A summary of stock option activity under our equity incentive plans and related information is as follows:
 
 Options Outstanding
 Number of
Shares
Weighted-
Average
Exercise Price
Weighted-
Average
Remaining
Contractual Life (In Years)
Aggregate
Intrinsic
Value (in thousands)
Balance as of January 31, 201935,465,543  $8.34  5.4$339,591  
Options exercised(4,797,359) 5.42    
Options forfeited/canceled(468,544) 15.78    
Balance as of October 31, 201930,199,640  $8.69  3.9$325,184  
Vested and exercisable as of October 31, 201925,550,655  $7.71  4.6$300,257  
Restricted Stock Units
A summary of the RSU activity under our 2015 Plan and related information is as follows:
 Number of RSUs OutstandingWeighted-
Average
Grant Date
Fair Value
Aggregate
Intrinsic
Value (in thousands)
Unvested balance as of January 31, 201921,917,550  $17.94  $392,515  
Granted10,889,807  19.35  
Vested(6,910,339) 17.21  
Forfeited(2,239,739) 18.76  
Unvested balance as of October 31, 201923,657,279  $18.72  $460,371  
Restricted Stock
A summary of the restricted stock activity under our 2015 Plan and related information is as follows:
 Number of Restricted Stock OutstandingWeighted-
Average
Grant Date
Fair Value
Aggregate
Intrinsic
Value (in thousands)
Unvested balance as of January 31, 20192,267,569  $18.70  $40,612  
Granted1,399,688  20.30  
Vested(1,063,977) 19.32  
Unvested balance as of October 31, 20192,603,280  $19.42  $50,660  
Stock-Based Compensation
The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Cost of revenue—product$862  $912  $2,190  $2,843  
Cost of revenue—support subscription3,327  3,517  8,940  11,101  
Research and development (1)
24,634  27,827  67,956  85,180  
Sales and marketing18,681  16,802  49,890  51,171  
General and administrative10,825  5,171  26,962  24,495  
Total stock-based compensation expense$58,329  $54,229  $155,938  $174,790  
____________________________________
 
(1) Included in the three and nine months ended October 31, 2019 were $1.9 million and $4.2 million in deferred payments related to the Compuverde acquisition. See Note 4 for further details.
v3.19.3.a.u2
Net Loss per Share Attributable to Common Stockholders - (Tables)
9 Months Ended
Oct. 31, 2019
Earnings Per Share [Abstract]  
Net Loss per Share
The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Net loss$(28,180) $(29,982) $(152,607) $(196,336) 
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted235,205  255,047  229,505  250,618  
Net loss per share attributable to common stockholders, basic and diluted$(0.12) $(0.12) $(0.66) $(0.78) 
Shares Excluded
The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
Stock options to purchase common stock37,814  30,769  41,201  32,150  
Unvested RSUs19,493  24,251  19,488  24,544  
Restricted stock and early exercised stock options subject to repurchase3,277  2,732  2,938  2,762  
Shares related to Notes21,884  21,884  16,513  21,884  
Shares issuable pursuant to ESPP236  571  80  571  
Total82,704  80,207  80,220  81,911  
v3.19.3.a.u2
Other Income (Expense), Net - (Tables)
9 Months Ended
Oct. 31, 2019
Other Income and Expenses [Abstract]  
Summary of Other Income (Expense)
Other income (expense), net consists of the following (in thousands):
Three Months Ended October 31,Nine Months Ended October 31,
2018201920182019
Interest income (1)$5,497  $6,770  $12,151  $20,376  
Interest expense (2)(6,706) (7,077) (14,819) (20,725) 
Foreign currency transactions gains (losses)(1,667) 97  (6,074) (2,329) 
Other income (expense)(13) 219  822  219  
Total other income (expense), net$(2,889) $ $(7,920) $(2,459) 
____________________________________

(1) Interest income includes interest income related to our cash, cash equivalents and marketable securities and non-cash interest income (expense) related to accretion (amortization) of the discount (premium) on marketable securities.

(2) Interest expense includes non-cash interest expense related to amortization of the debt discount and debt issuance costs and the contractual interest expense related to the Notes.
v3.19.3.a.u2
Segment Information - (Tables)
9 Months Ended
Oct. 31, 2019
Segment Reporting [Abstract]  
Revenue by Geographic Area
The following table depicts the disaggregation of revenue by geographic area based on the billing address of our customers and is consistent with how we evaluate our financial performance (in thousands):
 
 Three Months Ended October 31,Nine Months Ended October 31,
 2018201920182019
United States$263,488  $312,010  $678,166  $835,545  
Rest of the world109,291  116,399  259,442  315,891  
Total revenue$372,779  $428,409  $937,608  $1,151,436  
Long-Lived Assets by Geographic Area
Long-lived assets, which are comprised of property and equipment, net, by geographic area are summarized as follows (in thousands):
 
 As of January 31, 2019As of October 31, 2019
United States$120,876  $119,920  
Rest of the world4,477  10,316  
Total long-lived assets$125,353  $130,236  
v3.19.3.a.u2
Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Jul. 31, 2019
Feb. 01, 2019
Jan. 31, 2019
Jul. 31, 2018
Jan. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Restricted cash $ 15,287,000   $ 15,287,000       $ 15,823,000    
Deferred commissions 123,131,000 $ 96,440,000 123,131,000 $ 96,440,000 $ 118,568,000   $ 114,973,000 $ 91,469,000 $ 87,313,000
Impairment 0 0 0 0          
Operating lease right-of-use assets 119,403,000   119,403,000            
Operating lease liabilities $ 126,597,000   $ 126,597,000            
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01                  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Revenue expected to be recognized (as a percent) 41.00%   41.00%            
Revenue expected to be recognized term (in months) 12 months   12 months            
ASU 2016-02                  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Operating lease right-of-use assets           $ 124,500,000      
Operating lease liabilities           $ 130,600,000      
Product Revenue and Support Subscription Revenue                  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                  
Deferred revenue recognized $ 101,400,000 $ 67,000,000.0 $ 213,200,000 $ 151,400,000          
v3.19.3.a.u2
Basis of Presentation and Summary of Significant Accounting Policies - Deferred Commissions (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Accounting Policies [Abstract]        
Remaining amortization period 6 years   6 years  
Contract Assets        
Beginning balance $ 118,568 $ 91,469 $ 114,973 $ 87,313
Additions 34,071 31,884 82,381 71,887
Recognition of deferred commissions (29,508) (26,913) (74,223) (62,760)
Ending balance $ 123,131 $ 96,440 $ 123,131 $ 96,440
v3.19.3.a.u2
Basis of Presentation and Summary of Significant Accounting Policies - Deferred Commissions (Typed Dimensions) (Details)
Oct. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-11-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation (as a percent) 26.00%
v3.19.3.a.u2
Basis of Presentation and Summary of Significant Accounting Policies - Deferred Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Contract Liability        
Beginning balance $ 607,263 $ 413,247 $ 535,920 $ 374,102
Additions 142,164 122,681 400,605 290,463
Recognition of deferred revenue (106,229) (74,740) (293,327) (203,377)
Ending balance 643,198 461,188 643,198 461,188
Product Revenue and Support Subscription Revenue        
Contract Liability        
Ending balance 810,800   810,800  
Deferred revenue recognized $ 101,400 $ 67,000 $ 213,200 $ 151,400
v3.19.3.a.u2
Financial Instruments - Cash Equivalents, Marketable Securities and Restricted Cash (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Total $ 930,136  
Fair Value 936,969  
Cash Equivalents 7,446 $ 71,327
Marketable securities 936,969 749,482
Restricted Cash 15,287 15,823
Amortized Cost 932,497 793,932
Total gross unrealized gains 6,893 900
Total gross unrealized losses (60) (1,238)
Total fair value 959,702 836,632
Level 1 | Money market accounts    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 20,372 43,038
Cash Equivalents 5,085 27,215
Marketable securities 0 0
Restricted Cash 15,287 15,823
Level 2 | U.S. government treasury notes    
Debt Securities, Available-for-sale [Line Items]    
Total 350,325 315,329
Gross Unrealized Gains 2,165 208
Gross Unrealized Losses (30) (315)
Fair Value 352,460 315,222
Cash Equivalents 0 34,129
Marketable securities 352,460 281,093
Restricted Cash 0 0
Level 2 | U.S. government agencies    
Debt Securities, Available-for-sale [Line Items]    
Total 42,120 69,114
Gross Unrealized Gains 331 17
Gross Unrealized Losses (1) (154)
Fair Value 42,450 68,977
Cash Equivalents 0 9,983
Marketable securities 42,450 58,994
Restricted Cash 0 0
Level 2 | Corporate debt securities    
Debt Securities, Available-for-sale [Line Items]    
Total 436,842 363,860
Gross Unrealized Gains 3,800 534
Gross Unrealized Losses (10) (757)
Fair Value 440,632 363,637
Cash Equivalents 2,361 0
Marketable securities 438,271 363,637
Restricted Cash 0 0
Level 2 | Foreign government bonds    
Debt Securities, Available-for-sale [Line Items]    
Total 14,988 7,965
Gross Unrealized Gains 131 36
Gross Unrealized Losses (5) 0
Fair Value 15,114 8,001
Cash Equivalents 0 0
Marketable securities 15,114 8,001
Restricted Cash 0 0
Level 2 | Asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Total 88,222 37,664
Gross Unrealized Gains 466 105
Gross Unrealized Losses (14) (12)
Fair Value 88,674 37,757
Cash Equivalents 0 0
Marketable securities 88,674 37,757
Restricted Cash $ 0 $ 0
v3.19.3.a.u2
Financial Instruments - Amortized Cost and Estimated Fair Value (Details)
$ in Thousands
Oct. 31, 2019
USD ($)
Amortized Cost  
Due within one year $ 427,200
Due in one to five years 502,936
Total 930,136
Fair Value  
Due within one year 429,154
Due in one to five years 507,815
Total $ 936,969
v3.19.3.a.u2
Financial Instruments - Gross Unrealized Losses and Fair Values (Details)
$ in Thousands
Oct. 31, 2019
USD ($)
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months $ 54,594
Unrealized Loss, Less than 12 Months (53)
Fair Value, Greater than 12 months 15,927
Unrealized Loss, Greater than 12 months (7)
Fair Value, Total 70,521
Unrealized Loss, Total (60)
U.S. government treasury notes  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months 23,968
Unrealized Loss, Less than 12 Months (27)
Fair Value, Greater than 12 months 3,623
Unrealized Loss, Greater than 12 months (3)
Fair Value, Total 27,591
Unrealized Loss, Total (30)
U.S. government agencies  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months 0
Unrealized Loss, Less than 12 Months 0
Fair Value, Greater than 12 months 1,938
Unrealized Loss, Greater than 12 months (1)
Fair Value, Total 1,938
Unrealized Loss, Total (1)
Corporate debt securities  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months 11,532
Unrealized Loss, Less than 12 Months (7)
Fair Value, Greater than 12 months 10,366
Unrealized Loss, Greater than 12 months (3)
Fair Value, Total 21,898
Unrealized Loss, Total (10)
Foreign government bonds  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months 2,964
Unrealized Loss, Less than 12 Months (5)
Fair Value, Greater than 12 months 0
Unrealized Loss, Greater than 12 months 0
Fair Value, Total 2,964
Unrealized Loss, Total (5)
Asset-backed securities  
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract]  
Fair Value, Less than 12 months 16,130
Unrealized Loss, Less than 12 Months (14)
Fair Value, Greater than 12 months 0
Unrealized Loss, Greater than 12 months 0
Fair Value, Total 16,130
Unrealized Loss, Total $ (14)
v3.19.3.a.u2
Business Combination - Narrative (Details) - USD ($)
$ in Thousands
1 Months Ended 9 Months Ended
Jun. 30, 2019
Apr. 30, 2019
Oct. 31, 2019
Jan. 31, 2019
Business Acquisition [Line Items]        
Goodwill     $ 36,420 $ 10,997
Acquisition consideration held back     $ 0 $ 3,725
Developed technology        
Business Acquisition [Line Items]        
Useful Life (in years)     6 years 2 months 12 days  
Compuverde AB        
Business Acquisition [Line Items]        
Acquisition related costs   $ 500    
Cash consideration transferred   47,900    
Long-term debt assumed and subsequently paid off   11,600    
Goodwill   25,400    
Net liabilities assumed   10,200    
Deferred tax liabilities assumed   5,700    
Consideration to be transferred   $ 15,900    
Term of payments   2 years    
Compuverde AB | Restricted Stock Units        
Business Acquisition [Line Items]        
Equity interests issued and issuable $ 3,000      
Compuverde AB | Developed technology        
Business Acquisition [Line Items]        
Finite-lived intangibles acquired   $ 38,400    
Useful Life (in years)   7 years    
v3.19.3.a.u2
Balance Sheet Components - Inventory (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Balance Sheet Components Disclosure [Abstract]    
Raw materials $ 3,163 $ 3,349
Finished goods 36,688 41,338
Inventory $ 39,851 $ 44,687
v3.19.3.a.u2
Balance Sheet Components - Property and Equipment, Net (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Property Plant And Equipment [Line Items]    
Total property and equipment $ 387,784 $ 329,526
Less: accumulated depreciation and amortization (257,548) (204,173)
Property and equipment, net 130,236 125,353
Test equipment    
Property Plant And Equipment [Line Items]    
Total property and equipment 199,878 170,930
Computer equipment and software    
Property Plant And Equipment [Line Items]    
Total property and equipment 139,188 117,330
Furniture and fixtures    
Property Plant And Equipment [Line Items]    
Total property and equipment 8,483 6,980
Leasehold improvements    
Property Plant And Equipment [Line Items]    
Total property and equipment $ 40,235 $ 34,286
v3.19.3.a.u2
Balance Sheet Components - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Finite-Lived Intangible Assets [Line Items]        
Depreciation and amortization $ 20.6 $ 16.9 $ 49.8 $ 60.3
Intangible assets amortization expense $ 2.6 $ 0.9 $ 6.5 $ 1.6
Technology patents        
Finite-Lived Intangible Assets [Line Items]        
Useful Life (in years)     4 years  
Developed technology        
Finite-Lived Intangible Assets [Line Items]        
Useful Life (in years)     6 years 2 months 12 days  
v3.19.3.a.u2
Balance Sheet Components - Intangible Assets, Net (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value $ 75,225 $ 27,825
Accumulated Amortization (14,197) (7,707)
Net Carrying Amount 61,028 20,118
Technology patents    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 19,125 10,125
Accumulated Amortization (8,235) (6,572)
Net Carrying Amount 10,890 3,553
Developed technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 56,100 17,700
Accumulated Amortization (5,962) (1,135)
Net Carrying Amount $ 50,138 $ 16,565
v3.19.3.a.u2
Balance Sheet Components - Expected Amortization Expenses for Intangible Assets (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Balance Sheet Components Disclosure [Abstract]    
Remainder of 2020 $ 2,771  
2021 10,804  
2022 9,846  
2023 9,300  
2024 9,300  
Thereafter 19,007  
Net Carrying Amount $ 61,028 $ 20,118
v3.19.3.a.u2
Balance Sheet Components - Goodwill (Details)
$ in Thousands
9 Months Ended
Oct. 31, 2019
USD ($)
Goodwill [Roll Forward]  
Beginning balance $ 10,997
Goodwill acquired 25,423
Ending balance $ 36,420
v3.19.3.a.u2
Balance Sheet Components - Accrued Expenses and Other Liabilities (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Balance Sheet Components Disclosure [Abstract]    
Taxes payable $ 10,579 $ 7,146
Accrued marketing 10,159 6,173
Accrued travel and entertainment expenses 3,054 3,570
Acquisition consideration held back 0 3,725
Other accrued liabilities 24,431 19,246
Total accrued expenses and other liabilities $ 48,223 $ 39,860
v3.19.3.a.u2
Convertible Senior Notes - Narrative (Details)
1 Months Ended 9 Months Ended
Apr. 30, 2018
USD ($)
shares
day
$ / shares
Oct. 31, 2019
USD ($)
$ / shares
Oct. 31, 2018
USD ($)
Apr. 04, 2018
$ / shares
Debt Instrument [Line Items]        
Proceeds from issuance of convertible senior notes, net of issuance costs   $ 0 $ 562,062,000  
Debt issuance costs, net of amortization $ 12,900,000      
Closing price of stock (in dollars per share) | $ / shares   $ 19.46    
Payment for purchase of capped calls   $ 0 $ 64,630,000  
Capped Call        
Debt Instrument [Line Items]        
Payment for purchase of capped calls 64,600,000      
Convertible Senior Notes        
Debt Instrument [Line Items]        
Debt issuance costs, net of amortization 9,800,000 7,088,000    
Additional Paid-In Capital        
Debt Instrument [Line Items]        
Debt issuance costs, net of amortization $ 3,100,000 $ 3,068,000    
Class A        
Debt Instrument [Line Items]        
Conversion price (in dollars per share) | $ / shares $ 26.27      
Closing price of stock (in dollars per share) | $ / shares   $ 19.46   $ 19.83
Class A | Capped Call        
Debt Instrument [Line Items]        
Exercise price (in dollars per share) | $ / shares $ 39.66      
Exercise price premium percentage over last reported sales price       100.00%
Convertible Senior Notes        
Debt Instrument [Line Items]        
Principal amount $ 575,000,000.0 $ 575,000,000.0    
Interest rate (as a percent) 0.125%      
Proceeds from issuance of convertible senior notes, net of issuance costs $ 562,100,000      
Conversion percentage of principal amount plus accrued and unpaid contingent interest 100.00%      
Convertible debt, fair value based on the closing trading price per $100 of the Notes   602,800,000    
If-converted value   $ 425,900,000    
Convertible Senior Notes | Class A        
Debt Instrument [Line Items]        
Number of convertible shares at initial conversion rate (in shares) | shares 21,884,155      
Conversion ratio (in shares) 0.0380594      
Conversion price (in dollars per share) | $ / shares $ 26.27      
Redemption percentage of principal amount of Notes to be redeemed 100.00%      
Convertible Senior Notes | Class A | Any Fiscal Quarter Commencing After the Fiscal Quarter Ending on July 31, 2018        
Debt Instrument [Line Items]        
Threshold trading days | day 20      
Threshold consecutive trading days | day 30      
Threshold percentage of stock price trigger 130.00%      
Convertible Senior Notes | Class A | Five Business Day Period After any Five Consecutive Trading Day Period        
Debt Instrument [Line Items]        
Threshold consecutive trading days | day 5      
Threshold percentage of stock price trigger 98.00%      
Threshold business days | day 5      
Convertible Senior Notes | Class A | Immediately Preceding the Date on Which We Provide Notice of Redemption        
Debt Instrument [Line Items]        
Threshold trading days | day 2      
v3.19.3.a.u2
Convertible Senior Notes - Convertible Debt (Details) - USD ($)
$ in Thousands
9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Apr. 30, 2018
Liability:      
Less: debt issuance costs, net of amortization     $ (12,900)
Stockholders' equity:      
Allocated value of the conversion feature   $ 133,265  
Less: debt issuance costs     (12,900)
Convertible Senior Notes      
Liability:      
Principal $ 575,000    
Less: debt discount, net of amortization (97,898)    
Less: debt issuance costs, net of amortization (7,088)   (9,800)
Net carrying amount of the Notes 470,014    
Stockholders' equity:      
Less: debt issuance costs (7,088)   (9,800)
Additional Paid-In Capital      
Liability:      
Less: debt issuance costs, net of amortization (3,068)   (3,100)
Stockholders' equity:      
Allocated value of the conversion feature 136,333    
Less: debt issuance costs (3,068)   $ (3,100)
Additional paid-in capital $ 133,265    
v3.19.3.a.u2
Convertible Senior Notes - Interest Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Debt Instrument [Line Items]        
Total amortization of debt discount and debt issuance costs     $ 20,186 $ 14,414
Convertible Senior Notes        
Debt Instrument [Line Items]        
Amortization of debt discount $ 6,431 $ 6,084 18,824 13,441
Amortization of debt issuance costs 465 441 1,362 973
Total amortization of debt discount and debt issuance costs 6,896 6,525 20,186 14,414
Contractual interest expense 181 181 539 405
Total interest expense related to the Notes $ 7,077 $ 6,706 $ 20,725 $ 14,819
Effective interest rate of the liability component 5.60% 5.60% 5.60% 5.60%
v3.19.3.a.u2
Commitments and Contingencies - Narrative (Details) - USD ($)
Oct. 31, 2019
Jan. 31, 2019
Apr. 30, 2018
Lessee, Lease, Description [Line Items]      
Outstanding letters of credit $ 11,500,000 $ 10,800,000  
Letter of Credit      
Lessee, Lease, Description [Line Items]      
Principal amount   $ 500,000  
Convertible Senior Notes      
Lessee, Lease, Description [Line Items]      
Principal amount $ 575,000,000.0   $ 575,000,000.0
v3.19.3.a.u2
Leases - Narrative (Details)
$ in Millions
3 Months Ended
Oct. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]  
Undiscounted cash flows $ 7.9
Term of contract (in years) 12 years 4 months 24 days
Building  
Lessee, Lease, Description [Line Items]  
Additional lease obligation $ 19.4
v3.19.3.a.u2
Leases - Lease costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2019
Leases [Abstract]    
Fixed operating lease cost $ 8,509 $ 25,220
Variable lease cost 2,122 6,464
Short-term lease cost (12 months or less) 1,412 3,757
Total lease cost $ 12,043 $ 35,441
v3.19.3.a.u2
Leases - Future minimum lease payments (Details)
$ in Thousands
Oct. 31, 2019
USD ($)
Leases [Abstract]  
The remainder of 2020 $ 8,359
2021 34,411
2022 28,489
2023 23,507
2024 17,782
Thereafter 42,051
Total future lease payments 154,599
Less: imputed interest (28,002)
Present value of lease liabilities $ 126,597
v3.19.3.a.u2
Leases - Lease cash flow information (Details)
$ in Thousands
9 Months Ended
Oct. 31, 2019
USD ($)
Leases [Abstract]  
Cash paid for amounts included in the measurement of lease liabilities $ 24,403
Operating lease right-of-use assets obtained in exchange for operating lease liabilities $ 14,937
Weighted-average remaining lease term (years) 5 years 8 months 15 days
Weighted-average discount rate (as a percent) 6.52%
v3.19.3.a.u2
Leases - Schedule Aggregate Future Minimum Payments Under Non-Cancelable Operating Leases (Details)
$ in Thousands
Jan. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 31,297
2021 28,573
2022 24,381
2023 20,440
2024 14,780
Thereafter 30,096
Total future lease payments $ 149,567
v3.19.3.a.u2
Stockholders' Equity - Narrative (Details)
Apr. 04, 2018
USD ($)
$ / shares
shares
Oct. 31, 2019
stock_class
$ / shares
shares
Aug. 31, 2019
USD ($)
Jan. 31, 2019
$ / shares
shares
Class of Stock [Line Items]        
Shares authorized (in shares)   20,000,000   20,000,000
Shares issued (in shares)   0   0
Shares outstanding (in shares)   0   0
Number of classes of stock | stock_class   2    
Shares authorized (in shares)   2,250,000,000   2,250,000,000
Closing price of stock (in dollars per share) | $ / shares   $ 19.46    
Class A        
Class of Stock [Line Items]        
Shares authorized (in shares)   2,000,000,000   2,000,000,000
Par value per share (in dollars per share) | $ / shares   $ 0.0001   $ 0.0001
Shares issued (in shares)   259,920,406   243,524,000
Shares outstanding (in shares)   259,920,406   243,524,000
Value approved For repurchase | $     $ 150,000,000.0  
Stock repurchased and retired (in shares) 1,008,573      
Stock repurchased and retired during period, value | $ $ 20,000,000.0      
Closing price of stock (in dollars per share) | $ / shares $ 19.83 $ 19.46    
Class B        
Class of Stock [Line Items]        
Shares authorized (in shares)   250,000,000   250,000,000
Par value per share (in dollars per share) | $ / shares   $ 0.0001   $ 0.0001
v3.19.3.a.u2
Equity Incentive Plans - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Feb. 28, 2019
USD ($)
Oct. 31, 2019
USD ($)
period
shares
Oct. 31, 2018
USD ($)
Oct. 31, 2019
USD ($)
plan
period
shares
Oct. 31, 2018
USD ($)
Dec. 31, 2015
USD ($)
Share-based Payment Arrangement [Abstract]            
Number of equity incentive plans | plan       2    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Total stock-based compensation expense   $ 54,229,000 $ 58,329,000 $ 174,790,000 $ 155,938,000  
2015 Equity Incentive Plan | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase price as percentage of fair market value of common stock       100.00%    
2015 Employee Stock Purchase Plan            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Employee stock purchase plan offering period       24 months    
Number of purchase periods | period   4   4    
Purchase period, term       6 months    
Total stock-based compensation expense   $ 4,300,000 $ 11,600,000 $ 20,000,000.0 $ 26,200,000  
Unrecognized stock-based compensation expense   $ 33,100,000   $ 33,100,000    
Compensation cost (in years)       1 year 10 months 24 days    
2015 Employee Stock Purchase Plan | Class A            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase price as percentage of fair market value of common stock       85.00%    
Payroll deductions percentage   30.00%   30.00%    
Share cap for ESPP at purchase date (in shares) | shares   3,000   3,000    
Calendar year gap for ESPP contribution amount           $ 25,000
Dollar cap per purchase period $ 7,500          
Modification charges       $ 11,400,000    
v3.19.3.a.u2
Equity Incentive Plans - Equity Incentive Plans (Details) - USD ($)
$ / shares in Units, $ in Thousands
9 Months Ended 12 Months Ended
Oct. 31, 2019
Jan. 31, 2019
Apr. 04, 2018
Options Outstanding, Number of Shares      
Beginning balance (in shares) 35,465,543    
Options exercised (in shares) (4,797,359)    
Options forfeited/cancelled (in shares) (468,544)    
Ending balance (in shares) 30,199,640 35,465,543  
Vested and exercisable (in shares) 25,550,655    
Options Outstanding, Weighted Average Exercise Price      
Beginning balance (in dollars per share) $ 8.34    
Options exercised (in dollars per share) 5.42    
Options forfeited/cancelled (in dollars per share) 15.78    
Ending balance (in dollars per share) 8.69 $ 8.34  
Weighted Average Exercise Price, Vested and exercisable (in dollars per share) $ 7.71    
Weighted- Average Remaining Contractual Life      
Weighted Average Remaining Contractual Life (in years) 3 years 10 months 24 days 5 years 4 months 24 days  
Weighted Average Remaining Contractual Life, Vested and exercisable (in years) 4 years 7 months 6 days    
Aggregate Intrinsic Value      
Aggregate Intrinsic Value $ 325,184 $ 339,591  
Aggregate Intrinsic Value, Vested and exercisable $ 300,257    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Closing price of stock (in dollars per share) $ 19.46    
Unrecognized compensation cost, stock options $ 15,000    
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 2 years    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period (in years) 4 years    
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost (in years) 1 year 6 months    
Class A      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Closing price of stock (in dollars per share) $ 19.46   $ 19.83
v3.19.3.a.u2
Equity Incentive Plans - Restricted Stock Units (Details) - Restricted Stock Units - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2019
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Number of Restricted Stock Units Outstanding          
Unvested, Beginning balance (in shares)       21,917,550  
Granted (in shares)       10,889,807  
Vested (in shares)       (6,910,339)  
Forfeited (in shares)       (2,239,739)  
Unvested, Ending balance (in shares) 21,917,550 23,657,279   23,657,279  
Weighted-Average Grant Date Fair Value          
Beginning balance (in dollars per share)       $ 17.94  
Granted (in dollars per share)       19.35  
Vested (in dollars per share)       17.21  
Forfeited (in dollars per share)       18.76  
Ending balance (in dollars per share) $ 17.94 $ 18.72   $ 18.72  
Aggregate Intrinsic Value $ 392,515 $ 460,371   $ 460,371  
Share-based compensation expense   41,000 $ 31,200 118,700 $ 87,100
Compensation not yet recognized   $ 405,800   $ 405,800  
Compensation cost (in years)       2 years 10 months 24 days  
v3.19.3.a.u2
Equity Incentive Plans - Restricted Stock (Details) - USD ($)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jan. 31, 2019
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   $ 54,229 $ 58,329 $ 174,790 $ 155,938
Restricted Stock          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Stock-based compensation expense   4,400 $ 7,500 19,200 $ 17,700
Unrecognized stock-based compensation expense   $ 21,500   $ 21,500  
Compensation cost (in years)       2 years 1 month 6 days  
Number of Restricted Stock Outstanding          
Unvested, Beginning balance (in shares)       2,267,569  
Granted (in shares)       1,399,688  
Vested (in shares)       (1,063,977)  
Unvested, Ending balance (in shares) 2,267,569 2,603,280   2,603,280  
Weighted-Average Grant Date Fair Value          
Beginning balance (in dollars per share)       $ 18.70  
Granted (in dollars per share)       20.30  
Vested (in dollars per share)       19.32  
Ending balance (in dollars per share) $ 18.70 $ 19.42   $ 19.42  
Aggregate Intrinsic Value $ 40,612 $ 50,660   $ 50,660  
Restricted Stock | Performance Vesting at Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights (as a percent)       100.00%  
Number of Restricted Stock Outstanding          
Granted (in shares) 183,902     1,291,194  
Restricted Stock | Previously Issued Performance Awards          
Number of Restricted Stock Outstanding          
Granted (in shares)       108,494  
Restricted Stock | Minimum | Performance Vesting at Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights (as a percent)       0.00%  
Restricted Stock | Maximum | Performance Vesting at Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award vesting rights (as a percent)       160.00%  
v3.19.3.a.u2
Equity Incentive Plans - Stock-Based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 54,229 $ 58,329 $ 174,790 $ 155,938
Cost of revenue—product        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 912 862 2,843 2,190
Cost of revenue—support subscription        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 3,517 3,327 11,101 8,940
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 27,827 24,634 85,180 67,956
Research and development | Compuverde AB        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 1,900   4,200  
Sales and marketing        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense 16,802 18,681 51,171 49,890
General and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Total stock-based compensation expense $ 5,171 $ 10,825 $ 24,495 $ 26,962
v3.19.3.a.u2
Net Loss per Share Attributable to Common Stockholders - Net Loss per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Earnings Per Share [Abstract]        
Net loss $ (29,982) $ (28,180) $ (196,336) $ (152,607)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares) 255,047 235,205 250,618 229,505
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share) $ (0.12) $ (0.12) $ (0.78) $ (0.66)
v3.19.3.a.u2
Net Loss per Share Attributable to Common Stockholders - Shares Excluded (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 80,207 82,704 81,911 80,220
Stock options to purchase common stock        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 30,769 37,814 32,150 41,201
Unvested RSUs        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 24,251 19,493 24,544 19,488
Restricted stock and early exercised stock options subject to repurchase        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 2,732 3,277 2,762 2,938
Shares issuable pursuant to ESPP        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 571 236 571 80
Shares related to Notes        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares) 21,884 21,884 21,884 16,513
v3.19.3.a.u2
Other Income (Expense), Net - Other Income (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Other Income and Expenses [Abstract]        
Interest income $ 6,770 $ 5,497 $ 20,376 $ 12,151
Interest expense (7,077) (6,706) (20,725) (14,819)
Foreign currency transactions gains (losses) 97 (1,667) (2,329) (6,074)
Other income (expense) 219 (13) 219 822
Total other income (expense), net $ 9 $ (2,889) $ (2,459) $ (7,920)
v3.19.3.a.u2
Segment Information - Narrative (Details)
9 Months Ended
Oct. 31, 2019
segment
Segment Reporting [Abstract]  
Number of business activities 1
Number of reportable segments 1
v3.19.3.a.u2
Segment Information - Revenue by Geographic Area (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2019
Oct. 31, 2018
Oct. 31, 2019
Oct. 31, 2018
Revenues From External Customers And Long Lived Assets [Line Items]        
Total revenue $ 428,409 $ 372,779 $ 1,151,436 $ 937,608
United States        
Revenues From External Customers And Long Lived Assets [Line Items]        
Total revenue 312,010 263,488 835,545 678,166
Rest of the world        
Revenues From External Customers And Long Lived Assets [Line Items]        
Total revenue $ 116,399 $ 109,291 $ 315,891 $ 259,442
v3.19.3.a.u2
Segment Information - Long-Lived Assets by Geographic Area (Details) - USD ($)
$ in Thousands
Oct. 31, 2019
Jan. 31, 2019
Revenues From External Customers And Long Lived Assets [Line Items]    
Total long-lived assets $ 130,236 $ 125,353
United States    
Revenues From External Customers And Long Lived Assets [Line Items]    
Total long-lived assets 119,920 120,876
Rest of the world    
Revenues From External Customers And Long Lived Assets [Line Items]    
Total long-lived assets $ 10,316 $ 4,477
v3.19.3.a.u2
Label Element Value
Restricted Cash and Cash Equivalents us-gaap_RestrictedCashAndCashEquivalents $ 15,822,000
Restricted Cash and Cash Equivalents us-gaap_RestrictedCashAndCashEquivalents $ 15,287,000