Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)

$ (200,987)

$ (178,362)

$ (159,878)

^[1]

$ (0.79)

$ (0.77)

^[1]

$ (0.76)

^[1]

Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)

252,820

232,042

^[1]

211,609

^[1]

Product

Revenue:

Revenue:

$ 1,238,654

$ 1,075,586

$ 834,454

^[1]

Cost of revenue:

Cost of revenue:

362,970

352,054

275,242

^[1]

Subscription services

Revenue:

Revenue:

404,786

284,238

190,308

^[1]

Cost of revenue:

Cost of revenue:

$ 146,916

$ 105,474

$ 78,539

^[1]

[1]

Consolidated Statements of Comprehensive Loss - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

Statement of Comprehensive Income [Abstract]

Other comprehensive income (loss) net of tax:

$ (200,987)

$ (178,362)

$ (159,878)

^[1]

Change in unrealized net gain (loss) on available-for-sale securities

5,787

1,579

^[2]

(1,355)

^[2]

Comprehensive loss

$ (195,200)

$ (176,783)

^[2]

$ (161,233)

^[2]

[1]
[2]

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

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

Common Stock

Restricted Stock Units

Common Stock

Restricted Stock Units

Additional Paid-In Capital

Beginning balance (in shares) at Jan. 31, 2017

204,364

Beginning balance at Jan. 31, 2017

$ 537,201

$ 20

$ 1,281,452

$ (562)

$ (743,709)

Increase (Decrease) in Stockholders' Equity [Roll Forward]

Issuance of common stock upon exercise of stock options, net of repurchases (in shares)

8,814

Issuance of common stock upon exercise of stock options

24,581

$ 1

24,580

Vesting of early exercised stock options

150,673

1,042

Vesting and net issuance of restricted stock units ( in shares)

5,278

Vesting of restricted stock units

0

$ 1

(1)

Common stock issued under employee stock purchase plan (in shares)

2,523

Common stock issued under employee stock purchase plan

22,137

Other comprehensive income (loss)

(1,355)

Ending balance (in shares) at Jan. 31, 2018

(159,878)

^[1]

(159,878)

220,979

Ending 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, net of repurchases (in shares)

9,397

Issuance of common stock upon exercise of stock options

47,750

$ 1

47,749

Vesting of early exercised stock options

210,645

320

Vesting and net issuance of restricted stock units ( in shares)

2,398

8,378

Vesting of restricted stock units

0

$ 1

$ (1)

Tax withholding on vesting of restricted stock

(632)

Common stock issued under employee stock purchase plan (in shares)

3,381

Common stock issued under employee stock purchase plan

33,444

Repurchase of Common Stock (in shares)

(1,009)

Repurchase of common stock

(20,000)

Purchase of capped calls

(64,630)

Equity component of convertible senior notes, net

133,265

Other comprehensive income (loss)

1,579

Ending balance (in shares) at Jan. 31, 2019

(178,362)

243,524

Ending 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, net of repurchases (in shares)

7,770

Issuance of common stock upon exercise of stock options

42,931

$ 1

42,930

Vesting and net issuance of restricted stock units ( in shares)

226,705

624

9,215

Vesting of restricted stock units

$ 1

$ (1)

Tax withholding on vesting of restricted stock

(10,379)

Common stock issued under employee stock purchase plan (in shares)

3,743

Common stock issued under employee stock purchase plan

43,298

Repurchase of Common Stock (in shares)

(868)

Repurchase of common stock

(15,017)

Other comprehensive income (loss)

5,787

Ending balance (in shares) at Feb. 02, 2020

(200,987)

264,008

Ending balance at Feb. 02, 2020

$ 830,118

$ 26

$ 2,107,579

$ 5,449

$ (1,282,936)

[1]

Consolidated Statements of Cash Flows - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

CASH FLOWS FROM OPERATING ACTIVITIES

Adjustments to reconcile net loss to net cash provided by operating activities:

$ (200,987)

$ (178,362)

$ (159,878)

^[1]

Depreciation and amortization

89,710

70,878

61,744

Amortization of debt discount and debt issuance costs

27,179

21,031

0

Changes in operating assets and liabilities, net of effects of acquisitions:

226,705

210,645

150,673

Other

1,336

(5,039)

2,054

Accounts receivable, net

(79,442)

(135,649)

(74,505)

Inventory

2,393

(12,289)

(12,595)

Deferred commissions

(24,231)

(27,660)

(27,978)

Prepaid expenses and other assets

(16,734)

(6,972)

(23,799)

Operating lease right-of-use assets

26,511

Accounts payable

(18,856)

14,293

29,278

Accrued compensation and other liabilities

20,296

51,810

26,622

Operating lease liabilities

(25,377)

Deferred revenue

161,071

161,737

101,140

Net cash provided by operating activities

189,574

164,423

72,756

CASH FLOWS FROM INVESTING ACTIVITIES

Purchases of property and equipment

(87,847)

(100,246)

(65,060)

Acquisitions, net of cash acquired

(51,594)

(13,899)

0

Purchase of other investment

0

(5,000)

0

Purchase of intangible assets

(9,000)

0

Purchases of marketable securities

(795,580)

(665,357)

(202,656)

Sales of marketable securities

200,251

19,878

66,489

Maturities of marketable securities

419,059

253,280

144,068

Net cash used in investing activities

(324,711)

(511,344)

(57,159)

CASH FLOWS FROM FINANCING ACTIVITIES

Net proceeds from exercise of stock options

42,899

47,771

24,677

Proceeds from issuance of common stock under employee stock purchase plan

43,298

33,444

22,137

Proceeds from issuance of convertible senior notes, net of issuance costs

0

562,062

0

Payment for purchase of capped calls

0

(64,630)

0

Repayment of debt assumed from acquisition

(11,555)

(6,101)

0

Tax withholding on vesting of restricted stock

(10,379)

(632)

0

Repurchases of common stock

(15,017)

(20,000)

0

Net cash provided by financing activities

49,246

551,914

46,814

Net increase (decrease) in cash, cash equivalents and restricted cash

(85,891)

204,993

62,411

Cash, cash equivalents and restricted cash, beginning of year

463,813

258,820

196,409

Cash, cash equivalents and restricted cash, end of year

377,922

463,813

258,820

Cash and cash equivalents

447,990

244,057

Cash, cash equivalents and restricted cash, end of year

377,922

258,820

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION

Cash paid for interest

718

371

0

Cash paid for income taxes

4,824

4,696

3,090

SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION

Property and equipment purchased but not yet paid

6,814

13,873

9,940

Acquisition consideration held back to satisfy potential indemnification claims

0

3,725

0

Vesting of early exercised stock options

$ 0

$ 320

$ 1,042

[1]

Business Overview	12 Months Ended
Business Overview	Feb. 02, 2020
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. Data is foundational to our customers' digital transformation and we are focused on delivering innovative and disruptive technology and data storage solutions that enable customers to maximize the value of their data. We started with the vision of making flash storage available to enterprise organizations everywhere and established an entirely new customer experience including our innovative Evergreen Storage subscription that radically simplified storage ownership and reduced total cost of ownership for our customers. Our solutions serve data workloads on-premise, in the cloud, or hybrid environments and include mission-critical production, test/development, analytics, disaster recovery, and backup/recovery.

Basis of Presentation and Summary of Significant Accounting Policies

12 Months Ended

Feb. 02, 2020

Accounting Policies [Abstract]

Basis of Presentation and Summary of Significant Accounting Policies

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries and have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP). All intercompany balances and transactions have been eliminated in consolidation.

Change in Fiscal Year End

In September 2019, we adopted a 52/53 week fiscal year consisting of four 13-week quarters commencing with fiscal 2020 ended 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. 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. We will not be required to file a transition report because this change is not deemed a change in fiscal year for purposes of reporting subject to Rule 13a-10 or Rule 15d-10 of the Securities Exchange Act of 1934, as amended, as the change in fiscal year commences within seven days of the prior fiscal year.

Foreign Currency

The functional currency of our foreign subsidiaries is the U.S. dollar. Transactions denominated in currencies other than the functional currency are remeasured to the functional currency at the average exchange rate in effect during the period. At the end of each reporting period, monetary assets and liabilities are remeasured using exchange rates in effect at the balance sheet date. Non-monetary assets and liabilities are remeasured at historical exchange rates. Foreign currency transaction gains and losses are recorded in other income (expense), net in the consolidated statements of operations.

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 and 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, and 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.

Concentration Risk

Financial instruments that are exposed to concentration of credit risk consist primarily of cash and cash equivalents, marketable securities, and accounts receivable. At the end of fiscal 2019 and 2020, the majority of our cash and cash equivalents have been invested with three financial institutions and such deposits exceed federally insured limits. Management believes that the financial institutions that hold our investments are financially sound and, accordingly, are subject to minimal credit risk. We define a customer as an entity that purchases our products and services from one of our channel partners or from us directly. The majority of our revenue and accounts receivable are derived from the United States across a multitude of industries. We perform ongoing evaluations to determine customer credit. At the end of fiscal 2020, no channel partner represented 10% or more of total accounts receivable. At the end of fiscal 2019, we had one channel partner that represented 10% of total accounts receivable. At the end of fiscal 2019 and 2020, we had one customer that represented 10% and 12% of accounts receivable. No channel partner represented more than 10% of revenue for fiscal 2018 and 2020. One channel partner represented 11% of revenue for fiscal 2019. No customer represented 10% or more of revenue for fiscal 2018, 2019 or 2020. We rely on a limited number of contract manufacturers and suppliers of components for our products. In instances where contract manufacturers and suppliers fail to perform their obligations, we may be unable to find alternative contract manufacturers and suppliers or satisfactorily deliver our products to our customers on time.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash in banks and highly liquid investments, primarily money market accounts, purchased with an original maturity of three months or less.

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 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 consolidated statements of operations.

Fair Value of Financial Instruments

The carrying value of our financial instruments, including cash equivalents, accounts receivable, accounts payable and accrued liabilities, approximates fair value.

Accounts Receivable and Allowance

Accounts receivable are recorded at the invoiced amount, and stated at realizable value, net of an allowance for doubtful accounts. Credit is extended to customers based on an evaluation of their financial condition and other factors. We generally do not require collateral or other security to support accounts receivable. We perform ongoing credit evaluations of our customers and maintain an allowance for doubtful accounts.

We assess the collectability of the accounts by taking into consideration the aging of our trade receivables, historical experience, and management judgment. We write off trade receivables against the allowance when management determines a balance is uncollectible and no longer actively pursues collection of the receivable.

The following table presents the changes in the allowance for doubtful accounts:


	Fiscal Year Ended
	2018		2019		2020

	(in thousands)
Allowance for doubtful accounts, beginning balance	$	2,000	$	1,062	$	660
Provision, net of cash received	482		(79)		(80)
Write-offs	(1,420)		(323)		(38)
Allowance for doubtful accounts, ending balance	$	1,062	$	660	$	542

Restricted Cash

Restricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program. At the end of fiscal 2019 and 2020, we had restricted cash of $15.8 million and $15.3 million.

Inventory

Inventory consists of finished goods and component parts, which are purchased from contract manufacturers. Product demonstration units, which we regularly sell, are the primary component of our inventories. Inventories are stated at the lower of cost or net realizable value. Cost is determined using the specific identification method for finished goods and weighted-average method for component parts. We account for excess and obsolete inventory by reducing the carrying value to the estimated net realizable value of the inventory based upon management’s assumptions about future demand and market conditions. In addition, we record a liability for firm, non-cancelable and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of future demand forecasts consistent with excess and obsolete inventory valuations. At the end of fiscal 2020, we did not record any liability related to the above. Inventory write-offs were insignificant for fiscal 2018, 2019 and 2020.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is computed using the straight-line method over the estimated useful lives of the respective assets (test equipment—2 years, computer equipment and software—2 to 3 years, furniture and fixtures—7 years). Leasehold improvements are amortized over the shorter of their estimated useful lives or the remaining lease term. Depreciation commences once the asset is placed in service.

Business Combination

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 consolidated financial statements from the date of acquisition. Acquisition-related expenses are expensed as incurred.

Goodwill

Goodwill represents the excess of the purchase price consideration over the estimated fair value of the tangible and intangible assets acquired and liabilities assumed in a business combination. Goodwill is evaluated for impairment annually in the fourth quarter of our fiscal year as a single reporting unit, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. We may elect to qualitatively assess whether it is more likely than not that the fair value of our reporting unit is less than its carrying value. If we opt not to qualitatively assess, a two-step goodwill impairment test is performed. The first step compares our reporting unit's carrying value, including goodwill, to its fair value calculated based on our enterprise value. If the carrying value exceeds its fair value, the second step compares the carrying value of the goodwill to its implied fair value. If the carrying value exceeds the implied fair value, an impairment loss is recognized for the excess. We did not recognize any impairment of goodwill in any of the periods presented in the consolidated financial statements.

Purchased Intangible Assets

Purchased intangible assets with finite lives are stated at cost, net of accumulated amortization. We amortize our intangible assets on a straight-line basis over an estimated useful life of five to seven years.

Impairment of Long-Lived Assets

We review our long-lived assets, including property and equipment and finite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. We measure the recoverability of these assets by comparing the carrying amounts to the future undiscounted cash flows the assets are expected to generate. If the total of the future undiscounted cash flows is less than the carrying amount of an asset, we record an impairment charge for the amount by which the carrying amount of the asset exceeds its fair market value. There have been no impairment charges recorded in any of the periods presented in the consolidated financial statements.

Convertible Senior Notes

In accounting for the issuance of our convertible senior notes (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 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 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 consolidated balance sheets and are being amortized to interest expense in the 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 consolidated balance sheets.

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 subscription services 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 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 consolidated statements of operations.

Changes in total deferred commissions during the periods presented are as follows (in thousands):


	Fiscal Year Ended
	2019		2020

Beginning balance	$	87,313	$	114,973
Additions	131,084		141,147
Recognition of deferred commissions	(103,424)		(116,916)
Ending balance	$	114,973	$	139,204

During fiscal 2018, 2019 and 2020, we recognized sales commission expenses of $102.9 million, $118.4 million, and $142.5 million, respectively. Of the $139.2 million total deferred commissions balance at the end of fiscal 2020, we expect to recognize approximately 27% as sales commission expense over the next 12 months and the remainder thereafter.

There was no impairment related to capitalized commissions for fiscal 2018, 2019 or 2020.

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 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 have not yet been recognized as revenue and performance obligations pertaining to subscription services. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the consolidated balance sheet dates.

Changes in total deferred revenue during the periods presented are as follows (in thousands):


	Fiscal Year Ended
	2019		2020
Beginning balance	$	374,102	$	535,920
Additions	448,471		569,816
Recognition of deferred revenue	(286,653)		(408,448)
Ending balance	$	535,920	$	697,288

During fiscal 2019 and 2020, we recognized $191.1 million and $267.0 million in revenue pertaining to deferred revenue as of the beginning of each period.

Total contracted but not recognized revenue was $880.7 million at the end of fiscal 2020. Contracted but not recognized revenue consists of both deferred revenue and non-cancelable amounts that are expected to be invoiced and recognized as revenue in future periods. Of the $880.7 million contracted but not recognized revenue at the end of fiscal 2020, we expect to recognize approximately 42% over the next 12 months, and the remainder thereafter.

Revenue Recognition

We generate revenue from two sources: (1) product revenue which includes hardware and embedded software and (2) subscription services revenue which includes Evergreen Storage subscriptions, PaaS offerings, and Cloud Block Store.

Our product revenue is derived from the sale of integrated storage hardware and operating system software. We typically recognize product revenue upon transfer of control to our customers. Products are typically shipped directly by us to customers.

Our subscription services revenue is derived from services we perform in connection with the sale of subscription services and is recognized ratably over the contractual term, which generally ranges from one to six years. The majority of our product solutions are sold with an Evergreen Storage subscription service agreement, which typically commences upon transfer of control of the corresponding products to our customers. Costs for subscription services are expensed when incurred. In addition, our Evergreen Storage subscription services agreement provides our customers who continually maintain active subscription services agreements for three years a controller refresh with each additional three year renewal. The controller refresh represents a separate performance obligation that is included within the Evergreen Storage subscription service agreement and the allocated revenue is recognized upon shipment of the controller.

Our subscription services also include the right to receive unspecified software updates and upgrades on a when-and-if-available basis, software bug fixes, replacement parts and other services related to the underlying infrastructure, as well as access to our cloud-based management and support platform. We also sell professional services such as installation and implementation consulting services and the related revenue is recognized as services are performed.

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 should 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 the 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 the performance obligations.

Warranty

We generally provide a three-year warranty on hardware and a 90-day warranty on our software embedded in the hardware. Our hardware warranty provides for parts replacement for defective components and our software warranty provides for bug fixes. Our Evergreen Storage subscription agreement provides for the same parts replacement that customers are entitled to under our warranty program, except that replacement parts are delivered according to targeted response times to minimize disruption to our customers’ critical business applications. Substantially all customers purchase Evergreen Storage subscription agreements.

Therefore, given that substantially all our product sales are sold together with Evergreen Storage subscription agreements, we generally do not have exposure related to warranty costs and no warranty reserve has been recorded.

Research and Development

Research and development costs are expensed as incurred. Research and development costs consist primarily of personnel costs including stock-based compensation expense, expensed prototype, to the extent there is no alternative use for that equipment, consulting services, depreciation of equipment used in research and development and allocated overhead costs.

Software Development Costs

We expense software development costs before technological feasibility is reached. We have determined that technological feasibility is reached shortly before the release of our products and as a result, the development costs incurred after the establishment of technological feasibility and before the release of those products have not been significant and accordingly, all software development costs have been expensed as incurred.

Software development costs also include costs incurred related to our hosted applications used to deliver our support services. Capitalization begins when the preliminary project stage is complete, management with the relevant authority authorizes and commits to the funding of the software project, and it is probable the project will be completed and the software will be used to perform the intended function. Total costs related to our hosted applications incurred to date have been insignificant and as a result no software development costs were capitalized during fiscal 2018, 2019 or 2020.

Advertising Expenses

Advertising costs are expensed as incurred. Advertising expenses were $10.3 million, $10.7 million and $13.3 million for fiscal 2018, 2019 and 2020, respectively.

Stock-Based Compensation

Stock-based compensation includes expenses related to restricted stock units (RSUs), restricted stock, stock options and purchase rights issued to employees under our employee stock purchase plan (ESPP). RSUs and restricted stock are measured at the fair market value of the underlying stock at the grant date. We determine the fair value of purchase rights issued to employees under our ESPP and our stock options under our equity plans on the date of grant utilizing the Black-Scholes option pricing model, which is impacted by the fair value of our common stock, as well as changes in assumptions regarding a number of subjective variables. These variables include the expected common stock price volatility over the term of the awards, the expected term of the awards, risk-free interest rates and expected dividend yield.

We recognize stock-based compensation expense for stock-based awards on a straight-line basis over the period during which an employee is required to provide services in exchange for the award (generally the vesting period of the award). We account for forfeitures as they occur. For stock-based awards granted to employees with a performance condition, we recognize stock-based compensation expense for these awards under the accelerated attribution method over the requisite service period when management determines it is probable that the performance condition will be satisfied.

Income Taxes

We account for income taxes using the asset and liability method. Deferred income taxes are recognized by applying enacted statutory tax rates applicable to future years to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The measurement of deferred tax assets is reduced, if necessary, by a valuation allowance to amounts that are more likely than not to be realized.

We recognize tax benefits from uncertain tax positions only if we believe that it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits recognized in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of being realized upon settlement.

New Accounting Pronouncements Adopted in Fiscal 2020

In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 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 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 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 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 consolidated financial statements.

In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification, amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule was effective on November 5, 2018. We adopted this guidance in the first quarter of fiscal 2020.

Recent Accounting Pronouncements Not Yet Effective

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 February 3, 2020. The adoption of this standard is not expected to have a material impact to our 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 on February 3, 2020. The adoption of this standard will not have a material impact to our 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 should be applied either retrospectively or prospectively. We plan to adopt this new accounting standard prospectively, and the adoption is not expected to have a material impact on our consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740) (ASU 2019-12). The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for us beginning on February 1, 2021. Early adoption of the amendments is permitted. We are currently evaluating the impact of ASU 2019-12 on our consolidated financial statements.

Reclassifications

Certain amounts in prior periods have been reclassified to conform with current period presentation in our consolidated balance sheets and in significant components of our deferred tax assets and liabilities in Note 13.

Financial Instruments

12 Months Ended

Feb. 02, 2020

Fair Value Disclosures [Abstract]

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 Notes on a quarterly basis for disclosure purposes. We consider the fair values of the Notes at the end of fiscal 2019 and 2020 to be a Level 2 measurement due to its limited trading activity. Refer to Note 6 for the net carrying amounts and estimated fair values of our Notes at the end of fiscal 2019 and 2020.

Cash Equivalents, Marketable Securities and Restricted Cash

The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories at the end of fiscal 2019 and 2020 (in thousands):


	At the End of Fiscal 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities		Restricted Cash
Level 1

Money market accounts	$	—	$	—	$	—	$	43,038	$	27,215	$	—	$	15,823
Level 2
U.S. government treasury notes	315,329		208		(315)		315,222		34,129		281,093		—
U.S. government agencies	69,114		17		(154)		68,977		9,983		58,994		—
Corporate debt securities	363,860		534		(757)		363,637		—		363,637		—
Foreign government bonds	7,965		36		—		8,001		—		8,001		—
Asset-backed securities	37,664		105		(12)		37,757		—		37,757		—
Total	$	793,932	$	900	$	(1,238)	$	836,632	$	71,327	$	749,482	$	15,823


	At the End of Fiscal 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities		Restricted Cash
Level 1

Money market accounts	$	—	$	—	$	—	$	26,355	$	11,068	$	—	$	15,287
Level 2
U.S. government treasury notes	323,751		2,146		—		325,897		—		325,897		—
U.S. government agencies	53,930		317		(3)		54,244		—		54,244		—
Corporate debt securities	452,318		3,954		(1)		456,271		3,001		453,270		—
Foreign government bonds	14,994		147		—		15,141		—		15,141		—
Asset-backed securities	87,267		699		—		87,966		—		87,966		—
Total	$	932,260	$	7,263	$	(4)	$	965,874	$	14,069	$	936,518	$	15,287

The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):


	At the End of Fiscal 2020
	Amortized Cost		Fair Value
Due within one year	$	418,950	$	420,769
Due in one to five years	504,689		510,079
Due in five years to ten years	5,620		5,670
Total	$	929,259	$	936,518

Based on our evaluation of available evidence, we concluded that the gross unrealized losses on our investments at the end of fiscal 2019 and 2020 were temporary in nature. We do not intend to sell these investments and it is not more likely than not that we will be required to sell these investments before recovery of their amortized cost basis, which may be at maturity. The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position at the end of fiscal 2019 and 2020, aggregated by investment category (in thousands):


	At the End of Fiscal 2019
	Less than 12 months						Greater than 12 months						Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government treasury notes	$	156,529	$	(98)	$	40,413	$	(217)	$	196,942	$	(315)
U.S. government agencies	24,892		(20)		23,600		(134)		48,492		(154)
Corporate debt securities	83,577		(152)		96,914		(605)		180,491		(757)

Asset-backed securities	11,194		(12)		—		—		11,194		(12)
Total	$	276,192	$	(282)	$	160,927	$	(956)	$	437,119	$	(1,238)


	At the End of Fiscal 2020
	Less than 12 months						Greater than 12 months						Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government treasury notes	$	—	$	—	$	1,000	$	—	$	1,000	$	—
U.S. government agencies	4,998		(3)		—		—		4,998		(3)
Corporate debt securities	9,691		(1)		—		—		9,691		(1)


Total	$	14,689	$	(4)	$	1,000	$	—	$	15,689	$	(4)

Realized gains or losses on sale of marketable securities were not significant for all periods presented.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Business Combinations	12 Months Ended
Business Combinations	Feb. 02, 2020
Business Combinations [Abstract]
Business Combinations	Business Combinations Compuverde 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 is being amortized over seven years, $26.6 million of goodwill, $11.7 million in net liabilities assumed, and $5.4 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 being 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 are being recognized as stock-based compensation over the related vesting period. The results of Compuverde have been included in our 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. StorReduce In August 2018, we completed the acquisition of StorReduce, Inc. (StorReduce), a privately-held, cloud-first software-defined storage solution for managing large-scale unstructured data. Acquisition-related costs were immaterial and were expensed as incurred. The purchase consideration was $20.5 million in cash (net of cash acquired) after repayment of $6.1 million of debt assumed and payment of $1.1 million in transaction fees on behalf of StorReduce. The purchase price was allocated as follows: $17.7 million in developed technology which is being amortized over seven years, $11.0 million of goodwill, $4.5 million in net liabilities assumed, and $3.7 million in deferred tax liabilities. 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 StorReduce's technology with our storage portfolio and is not deductible for income tax purposes. We held back approximately $3.7 million in cash to satisfy potential indemnification claims. This amount was paid out in August 2019. In addition, we granted 622,482 RSUs to former StorReduce employees with a total grant date fair value of $13.6 million, subject to continuous employment. These awards are being recognized as stock-based compensation over the related vesting period. The results of StorReduce have been included in our 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.

Balance Sheet Components

12 Months Ended

Feb. 02, 2020

Balance Sheet Components Disclosure [Abstract]

Balance Sheet Components

Inventory

Inventory consists of the following (in thousands):


	At the End of Fiscal
	2019		2020
Raw materials	$	3,349	$	2,974
Finished goods	41,338		35,544
Inventory	$	44,687	$	38,518

Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):


	At the End of Fiscal
	2019		2020
Test equipment	$	170,930	$	205,555
Computer equipment and software	117,330		141,387
Furniture and fixtures	6,980		8,324
Leasehold improvements	34,286		40,356
Total property and equipment	329,526		395,622
Less: accumulated depreciation and amortization	(204,173)		(272,882)
Property and equipment, net	$	125,353	$	122,740

Depreciation and amortization expense related to property and equipment was $60.2 million, $68.3 million and $80.4 million for fiscal 2018, 2019 and 2020, respectively.

Intangible Assets, Net

Intangible assets, net consist of the following (in thousands):


	At the End of Fiscal
	2019										2020
	Gross Carrying Value		Accumulated Amortization		Net Carrying Amount		Gross Carrying Value		Accumulated Amortization		Net Carrying Amount
Technology patents	$	10,125	$	(6,572)	$	3,553	$	19,125	$	(8,933)	$	10,192
Developed technology	17,700		(1,135)		16,565		56,100		(8,035)		48,065
Intangible assets, net	$	27,825	$	(7,707)	$	20,118	$	75,225	$	(16,968)	$	58,257

In fiscal 2020, we acquired a portfolio of technology patents for $9.0 million with a useful life of 7 years. Intangible assets amortization expense was $1.5 million, $2.6 million and $9.3 million for fiscal 2018, 2019 and 2020, respectively. At the end of fiscal 2020, the weighted-average remaining amortization period was 3.7 years for technology patents and 6 years for developed technology. Amortization of 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 consolidated statements of operations.

At the end of fiscal 2020, future expected amortization expense for intangible assets is as follows (in thousands):


Fiscal Years Ending	Estimated Future Amortization Expense
2021	$	10,804
2022	9,846
2023	9,300
2024	9,300
2025	9,300
Thereafter	9,707
Total	$	58,257

Goodwill

The change in the carrying amount of goodwill is as follows (in thousands):


	Amount
Balance as of the end of fiscal 2019	$	10,997
Goodwill acquired	26,587
Balance as of the end of fiscal 2020	$	37,584

Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consist of the following (in thousands):


	At the End of Fiscal
	2019		2020
Taxes payable	$	7,146	$	9,012
Accrued marketing	6,173		7,679
Accrued travel and entertainment expenses	3,570		3,829

Acquisition consideration	3,725		6,149

Other accrued liabilities	19,246		20,554
Total accrued expenses and other liabilities	$	39,860	$	47,223

Convertible Senior Notes

12 Months Ended

Feb. 02, 2020

Debt Disclosure [Abstract]

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 common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $26.27 per share of 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 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 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 common stock, or a combination of cash and shares of our 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 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.

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):


	At the End of Fiscal
	2019		2020
Liability:
Principal	$	575,000	$	575,000
Less: debt discount, net of amortization	(116,722)		(91,378)
Less: debt issuance costs, net of amortization	(8,450)		(6,615)
Net carrying amount of the Notes	$	449,828	$	477,007

Stockholders' equity recorded at issuance:
Allocated value of the conversion feature			$	136,333
Less: debt issuance costs			(3,068)
Additional paid-in capital			$	133,265

The total estimated fair values of the Notes at the end of fiscal 2019 and 2020 were $558.2 million and $582.6 million. The fair values were determined based on the closing trading price per $100 of the Notes as of the last day of trading of fiscal 2019 and 2020. 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 common stock of $17.80 on the last day

of fiscal 2020, the if-converted value of the Notes of $389.5 million was less than its principal amount. At the end of fiscal 2020, the remaining term of the Notes is 38 months.

The following table sets forth total interest expense recognized related to the Notes (in thousands):


	Fiscal Year Ended
	2019			2020
Amortization of debt discount	$	19,611		$	25,344
Amortization of debt issuance costs	1,420			1,835
Total amortization of debt discount and debt issuance costs	21,031			27,179
Contractual interest expense	584			718
Total interest expense related to the Notes	$	21,615		$	27,897

Effective interest rate of the liability component	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 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 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 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 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 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.

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Feb. 02, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Leases At the end of fiscal 2020, we had various non-cancelable operating lease commitments for office facilities. Refer to Note 8—Leases for additional information regarding lease commitments. Contractual Purchase Obligations At the end of fiscal 2019 and 2020, we had $21.4 million and $36.6 million of non-cancelable contractual purchase obligations related to certain software service and other contracts. Convertible Senior 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 During fiscal 2020 in connection with a lease executed in January 2019, we issued a letter of credit of $0.5 million. At the end of fiscal 2019 and 2020, 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 consolidated balance sheet as of the end of fiscal 2020. 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 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.

Leases

12 Months Ended

Feb. 02, 2020

Leases [Abstract]

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 fiscal 2020, we amended an existing office facility lease to extend the lease term and add office space resulting in additional lease payments of $19.4 million and also executed a data center lease resulting in additional lease payments of approximately $22.4 million. The components of lease costs were as follows (in thousands):


	Fiscal Year Ended
	2020
Fixed operating lease cost	$	33,800
Variable lease cost ⁽¹⁾	8,097
Short-term lease cost (12 months or less)	5,537
Total lease cost	$	47,434

⁽¹⁾ Variable lease cost predominantly included common area maintenance charges.

Rent expense recognized under our operating leases prior to adoption of ASC 842 was $19.4 million and $25.6 million for fiscal 2018 and 2019.

Future lease payments under our non-cancelable operating leases at the end of fiscal 2020 were as follows (in thousands):


Fiscal Years Ending	Operating Leases
2021	$	34,411
2022	28,489
2023	23,507
2024	17,782
2025	14,471
Thereafter	27,581
Total future lease payments	$	146,241
Less: imputed interest	(26,000)
Present value of lease liabilities	$	120,241

Future lease payments in the above table do not include leases that have not commenced with total undiscounted cash flows of $30.3 million. These leases will commence in fiscal 2021 with lease terms ranging from 5 to 12 years.

Future lease payments under our non-cancelable operating leases at the end of fiscal 2019 were as follows (in thousands):


Fiscal Years Ending	Operating Leases
2020	$	31,297
2021	28,573
2022	24,381
2023	20,440
2024	14,780
Thereafter	30,096
Total	$	149,567

Supplemental cash flow information related to our operating leases for fiscal year 2020 as well as the weighted-average remaining lease term and weighted-average discount rate at the end of fiscal 2020 were as follows:


Cash paid for amounts included in the measurement of lease liabilities (in thousands)	$	32,785
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	14,937
Weighted-average remaining lease term (in years)	5.58
Weighted-average discount rate	6.5%

Stockholders' Equity

12 Months Ended

Feb. 02, 2020

Equity [Abstract]

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. At the end of fiscal 2020, 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, which we refer to as our "common stock", and Class B common stock. We have 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.

In December 2018, all outstanding shares of our Class B common stock automatically converted into the same number of shares of our Class A common stock pursuant to the terms of our amended and restated certificate of incorporation, which provided that each share of our Class B common stock would convert automatically into Class A common stock when the outstanding shares of Class B common stock represent less than 10% of the aggregate number of shares of the then outstanding Class A common stock and Class B common stock. No additional Class B shares can be issued following such conversion. At the end of fiscal 2020, 264,008,206 shares of Class A common stock were issued and outstanding.

Common Stock Reserved for Issuance

At the end of fiscal 2020, we had reserved shares of common stock for future issuance as follows:




Shares underlying outstanding stock options			26,822,243
Shares underlying outstanding restricted stock units			25,434,597
Shares reserved for future equity awards			14,661,413
Shares reserved for future employee stock purchase plan awards			7,652,778
Total			74,571,031

Share Repurchase Program

In August 2019, our board of directors approved the repurchase of up to $150.0 million of our common stock. The authorization allows us to repurchase shares of our 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 share 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. We will record the difference between cash paid for stock repurchases and underlying par value as a reduction to additional paid-in capital, to the extent the repurchases does not cause this balance to be reduced below zero, at which point the difference will be recorded as a reduction to accumulated deficit. During fiscal 2020, we repurchased and retired 867,657 shares of common stock at an average purchase price of $17.29 per share for an aggregate repurchase price of $15.0 million. At the end of fiscal 2020, $135.0 million remained available for future share repurchases under our current repurchase authorization.

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 common stock at $19.83 per share, which was equal to the closing price per share of our 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 consolidated balance sheet.

Equity Incentive Plans

12 Months Ended

Feb. 02, 2020

Share-based Payment Arrangement [Abstract]

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 consolidated statements of cash flows.

We initially reserved 27,000,000 shares of our common stock for issuance under our 2015 Plan. The number of shares reserved for issuance under our 2015 Plan increases automatically on the first day of each fiscal year through 2025, in an amount equal to 5% of the total number of shares of our capital stock outstanding as of the immediately preceding January 31.

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 Amended and Restated Employee Stock Purchase Plan

Our 2015 Employee Stock Purchase Plan became effective in connection with our IPO and was amended and restated in fiscal 2019 (2015 ESPP). A total of 3,500,000 shares of common stock was initially reserved for issuance under the 2015 ESPP and an additional 5,000,000 shares of common stock were added in connection with the amendment and restatement. The number of shares reserved for issuance under our 2015 ESPP increases automatically on the first day of February of each of 2016 through 2025, in an amount equal to the lesser of (i) 1% of the total number of shares of our capital stock outstanding as of the immediately preceding January 31, and (ii) 3,500,000 shares of common stock.

Our board of directors (or a committee thereof) has the authority under the 2015 ESPP to establish the length and terms of the offering periods and purchase periods and the purchase price of the shares of common stock which may be purchased under the plan. The current offering terms allow eligible employees to purchase shares of our 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 offering terms under the 2015 ESPP, on a prospective basis, to include an additional dollar cap of $7,500 per purchase period. The current terms also allow for a 24-month offering period beginning March 16th and September 16th of each year, with each offering period consisting of four 6 months purchase periods, subject to a reset provision. Further, currently, on each purchase date, eligible employees may purchase our common stock at a price per share equal to 85% of the lesser of the fair market value of our common stock (1) on the first trading day of the applicable offering period or (2) the purchase date.

Under the reset provision currently authorized, 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 charge to be recognized over the new offering period. During fiscal 2018 and 2020, multiple ESPP resets resulted in total modification charges of $9.0 million and $13.6 million, respectively, to be recognized over the new offering periods. There was no ESPP reset during fiscal 2019.

During fiscal 2018, 2019 and 2020, we recognized $18.3 million, $35.4 million and $24.5 million, of stock-based compensation expense related to our 2015 ESPP. At the end of fiscal 2020, there was $27.6 million of unrecognized stock-based compensation expense related to our 2015 ESPP which is expected to be recognized over a weighted-average period of approximately 1.6 years.

Stock Options

A summary of the 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 (Years)	Aggregate Intrinsic Value (in thousands)
Balance at the end of fiscal 2019	35,465,543	$	8.34	5.4	$	339,591

Options exercised	(7,770,157)	5.53
Options forfeited/canceled	(873,143)	13.91
Balance at the end of fiscal 2020	26,822,243	$	8.97	3.9	$	237,803
Vested and exercisable at the end of fiscal 2020	23,665,389	$	8.12	4.4	$	229,523

The aggregate intrinsic value of options vested and exercisable at the end of fiscal 2020 is calculated based on the difference between the exercise price and the closing price of $17.80 of our common stock on the last day of fiscal 2020. The aggregate intrinsic value of options exercised during fiscal 2018, 2019 and 2020 was $104.9 million, $165.0 million and $106.6 million.

During fiscal 2018, 2019 and 2020, we recognized $49.0 million, $32.0 million and $15.8 million, of stock-based compensation expense related to stock options. The weighted-average grant date fair value of options granted was $5.57 per share for fiscal year 2018 and no options were granted in fiscal 2019 and 2020. The total

grant date fair value of options vested during fiscal 2018, 2019 and 2020 was $42.5 million, $45.6 million and $34.2 million.

At the end of fiscal 2020, total unamortized stock-based compensation expense related to our employee stock options was $11.0 million, which is expected to be recognized over a weighted-average period of approximately 1.4 years.

Determination of Fair Value

The fair value of stock options granted to employees and to be purchased under ESPP is estimated on the grant date using the Black-Scholes option pricing model. This valuation model for stock-based compensation expense requires us to make assumptions and judgments about the variables used in the calculation including the fair value of the underlying common stock, expected term, the expected volatility of the common stock, a risk-free interest rate and expected dividend yield.

We estimate the fair value of employee stock options and ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions:


	Fiscal Year Ended
	2018		2019	2020
Employee Stock Options
Expected term (in years)	6.1		n/a	n/a
Expected volatility	47	%	n/a	n/a
Risk-free interest rate	1.9	%	n/a	n/a
Dividend rate	—		n/a	n/a
Fair value of common stock	$12.84		n/a	n/a
Employee Stock Purchase Plan
Expected term (in years)	0.5 - 2.0		0.5 - 2.0	0.5 - 2.0
Expected volatility	35% - 39%		44% - 47%	42% - 47%
Risk-free interest rate	0.9% - 1.4%		2% - 2.8%	1.7% - 2.5%
Dividend rate	—		—	—
Fair value of common stock	$10.39 - $14.65		$20.62 - $27.66	$17.76 - $20.87

The assumptions used in the Black-Scholes option pricing model were determined as follows.

Fair Value of Common Stock—We use the market closing price of our common stock as reported on the New York Stock Exchange to determine the fair value of our common stock at each grant date.

Expected Term—The expected term represents the period that our stock-based awards are expected to be outstanding. The expected term assumptions were determined based on the vesting terms, exercise terms and contractual lives of the options and ESPP purchase rights.

Expected Volatility—Starting in fiscal 2019, the expected volatility for ESPP purchase rights is based on the historical volatility of our common stock for a period equivalent to the expected term of the ESPP purchase rights. Prior to fiscal 2019, since we had limited trading history of our common stock, the expected volatility was derived from the average historical stock volatilities of several public companies within the same industry that we considered to be comparable to our business over a period equivalent to the expected term of the stock option grants and ESPP purchase rights.

Risk-Free Interest Rate—The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for zero-coupon U.S. Treasury notes with maturities approximately equal to the expected term of the stock option grants and ESPP purchase rights.

Dividend Rate—We have never declared or paid any cash dividends and do not plan to pay cash dividends in the foreseeable future, and, therefore, use an expected dividend yield of zero.

RSUs

A summary of the RSU activity under our 2015 Plan and related information is as follows:


	Number of RSUs Outstanding	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance at the end of fiscal 2019	21,917,550	$	17.94	$	392,515
Granted	15,780,796	18.91
Vested	(9,241,583)	17.12
Forfeited	(3,022,166)	18.93

Unvested balance at the end of fiscal 2020	25,434,597	$	18.72	$	452,736

The aggregate fair value, as of the respective vesting dates, of RSUs that vested during fiscal years 2018, 2019 and 2020 was $75.5 million, $184.8 million and $164.1 million.

During fiscal 2018, 2019 and 2020, we recognized $83.4 million, $119.9 million and $161.8 million in stock-based compensation expense related to RSUs. At the end of fiscal 2020, total unrecognized employee compensation cost related to unvested RSUs was $435.2 million, which is expected to be recognized over a weighted-average period of approximately 3.0 years.

Restricted Stock

During fiscal 2020, we granted an aggregate of 1,399,688 shares of performance restricted stock as follows:

•1,291,194 shares were issued at the 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. A total of 930,678 shares were earned at the end of fiscal 2020 based on the performance condition achieved and these shares are subject to service conditions through the vesting periods. The remaining shares will be canceled in fiscal 2021.

•108,494 shares were issued based on the actual attainment of some performance restricted stock issued in fiscal 2018 and 2019.

A summary of the restricted stock activity under our 2015 Plan and related information is as follows:


	Number of Restricted Stock Outstanding	Weighted- Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance at the end of fiscal 2019	2,267,569	$	18.70	$	40,612
Granted	1,399,688	20.30
Vested	(1,284,638)	18.97
Forfeited/canceled	(255,413)	19.93
Unvested balance at the end of fiscal 2020	2,127,206	$	19.58	$	37,864

All unvested shares of restricted stock are subject to cancellation to the extent vesting conditions are not met. The aggregate fair value of restricted stock that vested during fiscal years 2019 and 2020 was $3.6 million and $24.2 million.

During fiscal 2019 and 2020, we recognized $23.3 million and $24.6 million in stock-based compensation expense related to restricted stock. At the end of fiscal 2020, total unrecognized employee compensation cost related to unvested restricted stock was $14.2 million, which is expected to be recognized over a weighted-average period of approximately 1.8 years.

Stock-Based Compensation Expense

The following table summarizes the components of stock-based compensation expense recognized in the consolidated statements of operations (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Cost of revenue—product	$	1,630	$	2,951	$	3,732
Cost of revenue—subscription services	9,050		12,378		14,403
Research and development	71,229		92,484		107,658
Sales and marketing	47,687		66,350		67,560
General and administrative	21,077		36,482		33,352
Total stock-based compensation expense	$	150,673	$	210,645	$	226,705

Net Loss per Share Attributable to Common Stockholders

12 Months Ended

Feb. 02, 2020

Earnings Per Share [Abstract]

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.

In December 2018, all outstanding shares of Class B common stock converted to shares of Class A common stock as discussed in Note 9. The conversion did not impact our basic or diluted net loss per share attributable to common stockholders for fiscal year 2019. Prior to the conversion, the rights, including the liquidation and dividend rights, of the holders of our Class A and Class B common stock were identical, except with respect to voting. As the liquidation and dividend rights were identical, the undistributed earnings were allocated on a proportionate basis and the resulting net loss per share attributed to common stockholders was, therefore, the same for both Class A and Class B common stock on an individual or combined basis for fiscal 2018.

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):


	Fiscal Year Ended
	2018		2019		2020

Net loss	$	(159,878)	$	(178,362)	$	(200,987)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	211,609		232,042		252,820
Net loss per share attributable to common stockholders, basic and diluted	$	(0.76)	$	(0.77)	$	(0.79)

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):


	Fiscal Year Ended
	2018	2019	2020
Stock options to purchase common stock	52,424	39,928	31,315
Unvested restricted stock units	15,496	19,488	24,374
Restricted stock subject to repurchase	—	2,881	2,614
Shares related to convertible senior notes	—	17,867	21,884
Shares issuable pursuant to the ESPP	1,544	2,411	1,031
Early exercised stock options subject to repurchase	246	7	—
Total	69,710	82,582	81,218

Other Income (Expense), Net (Notes)

12 Months Ended

Feb. 02, 2020

Other Income and Expenses [Abstract]

Other Income (Expense), Net

Other income (expense), net consists of the following (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Interest income ⁽¹⁾	$	5,424	$	18,013	$	27,241
Interest expense ⁽²⁾	(19)		(21,615)		(27,897)
Foreign currency transaction gains (losses)	5,976		(5,230)		(3,396)
Other income	64		816		669
Total other income (expense), net	$	11,445	$	(8,016)	$	(3,383)

_________________________________

(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 for fiscal 2019 and 2020.

Income Taxes

12 Months Ended

Feb. 02, 2020

Principles of Consolidation

Income Taxes

The geographical breakdown of loss before provision for income taxes is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020

Domestic	$	(117,391)	$	(145,428)	$	(212,672)
International	(38,598)		(31,845)		18,006
Total	$	(155,989)	$	(177,273)	$	(194,666)

The components of the provision for income taxes are as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Current:
State	$	525	$	571	$	538
Foreign	3,580		4,214		7,774
Total	$	4,105	$	4,785	$	8,312
Deferred:
Federal	$	—	$	(2,776)	$	(1,559)
State	—		(920)		(198)
Foreign	(216)		—		(234)
Total	$	(216)	$	(3,696)	$	(1,991)
Provision for income taxes	$	3,889	$	1,089	$	6,321

The reconciliation of the federal statutory income tax rate and effective income tax rate is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020

Tax at federal statutory rate	$	(51,314)	$	(37,227)	$	(40,880)
State tax, net of federal benefit	351		(469)		210
Stock-based compensation expense	(9,953)		(28,437)		(6,683)
Research and development tax credits	(7,629)		(10,371)		(11,033)
Foreign rate differential	18,667		12,299		2,935
Change in valuation allowance	(44,784)		85,533		61,050
Foreign on-shoring intellectual property	—		(20,371)		—
Remeasurement of deferred tax assets and liabilities due to tax reform	97,280		—		—

Other	1,271		132		722
Provision for income taxes	$	3,889	$	1,089	$	6,321

Deferred income taxes reflect the net effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. The significant components of our deferred tax assets and liabilities were as follows (in thousands):


	At the End of Fiscal
	2019		2020

Deferred tax assets:
Net operating loss carryforwards	$	189,117	$	232,155
Tax credit carryover	50,848		76,209
Accruals and reserves	12,506		11,489
Deferred revenue	43,579		60,473
Stock-based compensation expense	31,743		31,906
Depreciation and amortization	23,545		18,893
Charitable contribution carryforwards	2,850		2,835
ASC 842 lease liabilities	—		25,197
Other	81		—
Total deferred tax assets	$	354,269	$	459,157
Valuation allowance	(307,475)		(385,791)
Total deferred tax assets, net of valuation allowance	$	46,794	$	73,366
Deferred tax liabilities:
Deferred commissions	$	(27,537)	$	(30,628)
Convertible debt	(14,230)		(11,226)
ASC 842 right-of-use assets	—		(23,502)
Acquired intangibles and goodwill	(3,967)		(10,421)

Other	—		(1,729)
Total deferred tax liabilities	$	(45,734)	$	(77,506)
Net deferred tax assets (liabilities)	$	1,060	$	(4,140)

At the end of fiscal 2020, the undistributed earnings of $40.9 million from non-U.S. operations held by our foreign subsidiaries are designated as permanently reinvested outside the U.S. Accordingly, no additional U.S. income taxes or additional foreign withholding taxes have been provided thereon. Determination of the amount of unrecognized deferred tax liability related to these earnings is not practicable.

At the end of fiscal 2020, we had net operating loss carryforwards for federal income tax purposes of approximately $960.2 million and state income tax purposes of approximately $509.8 million. These net operating loss carryforwards will expire, if not utilized, beginning in 2028 for federal and state income tax purposes.

We had federal and state research and development tax credit carryforwards of approximately $55.2 million and $48.3 million at the end of fiscal 2020. The federal research and development tax credit carryforwards will expire commencing in 2028, while the state research and development tax credit carryforwards have no expiration date.

Realization of deferred tax assets is dependent on future taxable income, the existence and timing of which is uncertain. Based on our history of losses, management has determined that it is more likely than not that the U.S. deferred tax assets will not be realized, and accordingly has placed a full valuation allowance on the net U.S. deferred tax assets. The valuation allowance increased by $85.5 million and $78.3 million, respectively, during fiscal years ended 2019 and 2020.

Utilization of the net operating loss carryforwards and credits may be subject to substantial annual limitation due to the ownership change limitations provided by Section 382 of the Internal Revenue Code of 1986, as amended, and similar state provisions. The annual limitation may result in the expiration of net operating losses and credits before utilization. In February 2020, we completed an analysis through the end of fiscal 2020 to evaluate whether there are any limitations of our net operating loss carryforwards and concluded no limitations currently exist.

Uncertain Tax Positions

The activity related to the unrecognized tax benefits is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Gross unrecognized tax benefits—beginning balance	$	6,375	$	12,401	$	18,891
Decreases related to tax positions taken during prior years	(24)		(845)		(34)
Increases related to tax positions taken during prior years	619		—		408

Increases related to tax positions taken during current year	5,431		7,335		9,305
Gross unrecognized tax benefits—ending balance	$	12,401	$	18,891	$	28,570

At the end of fiscal 2020, our gross unrecognized tax benefit was approximately $28.6 million, $0.9 million of which if recognized, would have an impact on the effective tax rate.

At the end of fiscal 2020, we had no current or cumulative interest and penalties related to uncertain tax positions.

It is difficult to predict the final timing and resolution of any particular uncertain tax position. Based on our assessment, including experience and complex judgments about future events, we do not expect that changes in the liability for unrecognized tax benefits during the next twelve months will have a significant impact on our consolidated financial position or results of operations.

We file income tax returns in the U.S. federal jurisdiction as well as many U.S. states and foreign jurisdictions. The tax returns for fiscal years 2009 and forward remain open to examination by the major jurisdictions in which we are subject to tax. The tax returns for fiscal years outside the normal statutes of limitation remain open to audit by tax authorities due to tax attributes generated in those early years, which have been carried forward and may be audited in subsequent years when utilized.

Segment Information

12 Months Ended

Feb. 02, 2020

Segment Reporting [Abstract]

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):


	Fiscal Year Ended
	2018		2019		2020

United States	$	763,719	$	979,454	$	1,184,923
Rest of the world	261,043		380,370		458,517
Total revenue	$	1,024,762	$	1,359,824	$	1,643,440

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):


	At the End of Fiscal
	2019		2020
United States	$	120,876	$	113,942
Rest of the world	4,477		8,798
Total long-lived assets	$	125,353	$	122,740

401(k) Plan	12 Months Ended
401(k) Plan	Feb. 02, 2020
Compensation Related Costs [Abstract]
401(k) Plan	401(k) PlanWe have a 401(k) savings plan (the 401(k) plan) which qualifies as a deferred salary arrangement under section 401(k) of the Internal Revenue Code. Under the 401(k) plan, participating employees may elect to contribute up to 85% of their eligible compensation, subject to certain limitations. We currently match 50% of employees' contributions up to a maximum of $4,000 annually. Matching contributions will be immediately vested. Our contributions to the plan were $1.4 million and $8.6 million during fiscal 2019 and 2020.

Basis of Presentation and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Feb. 02, 2020

Accounting Policies [Abstract]

The consolidated financial statements include the accounts of the Company and our wholly owned subsidiaries and have been prepared in conformity with accounting principles generally accepted in the United States (U.S. GAAP). All intercompany balances and transactions have been eliminated in consolidation.

Change in Fiscal Year End

In September 2019, we adopted a 52/53 week fiscal year consisting of four 13-week quarters commencing with fiscal 2020 ended 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. 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. We will not be required to file a transition report because this change is not deemed a change in fiscal year for purposes of reporting subject to Rule 13a-10 or Rule 15d-10 of the Securities Exchange Act of 1934, as amended, as the change in fiscal year commences within seven days of the prior fiscal year.

Foreign Currency

The functional currency of our foreign subsidiaries is the U.S. dollar. Transactions denominated in currencies other than the functional currency are remeasured to the functional currency at the average exchange rate in effect during the period. At the end of each reporting period, monetary assets and liabilities are remeasured using exchange rates in effect at the balance sheet date. Non-monetary assets and liabilities are remeasured at historical exchange rates. Foreign currency transaction gains and losses are recorded in other income (expense), net in the consolidated statements of operations.

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 and 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, and 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.

Concentration Risk

Financial instruments that are exposed to concentration of credit risk consist primarily of cash and cash equivalents, marketable securities, and accounts receivable. At the end of fiscal 2019 and 2020, the majority of our cash and cash equivalents have been invested with three financial institutions and such deposits exceed federally insured limits. Management believes that the financial institutions that hold our investments are financially sound and, accordingly, are subject to minimal credit risk. We define a customer as an entity that purchases our products and services from one of our channel partners or from us directly. The majority of our revenue and accounts receivable are derived from the United States across a multitude of industries. We perform ongoing evaluations to determine customer credit. At the end of fiscal 2020, no channel partner represented 10% or more of total accounts receivable. At the end of fiscal 2019, we had one channel partner that represented 10% of total accounts receivable. At the end of fiscal 2019 and 2020, we had one customer that represented 10% and 12% of accounts receivable. No channel partner represented more than 10% of revenue for fiscal 2018 and 2020. One channel partner represented 11% of revenue for fiscal 2019. No customer represented 10% or more of revenue for fiscal 2018, 2019 or 2020. We rely on a limited number of contract manufacturers and suppliers of components for our products. In instances where contract manufacturers and suppliers fail to perform their obligations, we may be unable to find alternative contract manufacturers and suppliers or satisfactorily deliver our products to our customers on time.

Cash and Cash Equivalents

Cash and cash equivalents consist of cash in banks and highly liquid investments, primarily money market accounts, purchased with an original maturity of three months or less.

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 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 consolidated statements of operations.

Fair Value of Financial Instruments

The carrying value of our financial instruments, including cash equivalents, accounts receivable, accounts payable and accrued liabilities, approximates fair value.

Accounts Receivable and Allowance

Accounts receivable are recorded at the invoiced amount, and stated at realizable value, net of an allowance for doubtful accounts. Credit is extended to customers based on an evaluation of their financial condition and other factors. We generally do not require collateral or other security to support accounts receivable. We perform ongoing credit evaluations of our customers and maintain an allowance for doubtful accounts.

We assess the collectability of the accounts by taking into consideration the aging of our trade receivables, historical experience, and management judgment. We write off trade receivables against the allowance when management determines a balance is uncollectible and no longer actively pursues collection of the receivable.

Restricted Cash

Restricted cash is comprised of cash collateral for letters of credit related to our leases and for a vendor credit card program. At the end of fiscal 2019 and 2020, we had restricted cash of $15.8 million and $15.3 million.

Inventory

Inventory consists of finished goods and component parts, which are purchased from contract manufacturers. Product demonstration units, which we regularly sell, are the primary component of our inventories. Inventories are stated at the lower of cost or net realizable value. Cost is determined using the specific identification method for finished goods and weighted-average method for component parts. We account for excess and obsolete inventory by reducing the carrying value to the estimated net realizable value of the inventory based upon management’s assumptions about future demand and market conditions. In addition, we record a liability for firm, non-cancelable and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of future demand forecasts consistent with excess and obsolete inventory valuations. At the end of fiscal 2020, we did not record any liability related to the above. Inventory write-offs were insignificant for fiscal 2018, 2019 and 2020.

Property and Equipment

Property and equipment are stated at cost less accumulated depreciation and amortization. Depreciation and amortization is computed using the straight-line method over the estimated useful lives of the respective assets (test equipment—2 years, computer equipment and software—2 to 3 years, furniture and fixtures—7 years). Leasehold improvements are amortized over the shorter of their estimated useful lives or the remaining lease term. Depreciation commences once the asset is placed in service.

Business Combination

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 consolidated financial statements from the date of acquisition. Acquisition-related expenses are expensed as incurred.

Goodwill

Goodwill represents the excess of the purchase price consideration over the estimated fair value of the tangible and intangible assets acquired and liabilities assumed in a business combination. Goodwill is evaluated for impairment annually in the fourth quarter of our fiscal year as a single reporting unit, and whenever events or changes in circumstances indicate the carrying value of goodwill may not be recoverable. We may elect to qualitatively assess whether it is more likely than not that the fair value of our reporting unit is less than its carrying value. If we opt not to qualitatively assess, a two-step goodwill impairment test is performed. The first step compares our reporting unit's carrying value, including goodwill, to its fair value calculated based on our enterprise value. If the carrying value exceeds its fair value, the second step compares the carrying value of the goodwill to its implied fair value. If the carrying value exceeds the implied fair value, an impairment loss is recognized for the excess. We did not recognize any impairment of goodwill in any of the periods presented in the consolidated financial statements.

Purchased Intangible Assets

Purchased intangible assets with finite lives are stated at cost, net of accumulated amortization. We amortize our intangible assets on a straight-line basis over an estimated useful life of five to seven years.

Impairment of Long-Lived Assets

Impairment of Long-Lived AssetsWe review our long-lived assets, including property and equipment and finite-lived intangible assets, for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. We measure the recoverability of these assets by comparing the carrying amounts to the future undiscounted cash flows the assets are expected to generate. If the total of the future undiscounted cash flows is less than the carrying amount of an asset, we record an impairment charge for the amount by which the carrying amount of the asset exceeds its fair market value. There have been no impairment charges recorded in any of the periods presented in the consolidated financial statements.

Convertible Senior Notes

Convertible Senior NotesIn accounting for the issuance of our convertible senior notes (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 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 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 consolidated balance sheets and are being amortized to interest expense in the 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 consolidated balance

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 subscription services 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 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 consolidated statements of operations.

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 consolidated statements of operations on a straight-line basis over the lease term and record variable lease payments as incurred.

Revenue

Deferred Revenue

Deferred revenue primarily consists of amounts that have been invoiced but have not yet been recognized as revenue and performance obligations pertaining to subscription services. The current portion of deferred revenue represents the amounts that are expected to be recognized as revenue within one year of the consolidated balance sheet dates.

Changes in total deferred revenue during the periods presented are as follows (in thousands):


	Fiscal Year Ended
	2019		2020
Beginning balance	$	374,102	$	535,920
Additions	448,471		569,816
Recognition of deferred revenue	(286,653)		(408,448)
Ending balance	$	535,920	$	697,288

During fiscal 2019 and 2020, we recognized $191.1 million and $267.0 million in revenue pertaining to deferred revenue as of the beginning of each period.

Total contracted but not recognized revenue was $880.7 million at the end of fiscal 2020. Contracted but not recognized revenue consists of both deferred revenue and non-cancelable amounts that are expected to be invoiced and recognized as revenue in future periods. Of the $880.7 million contracted but not recognized revenue at the end of fiscal 2020, we expect to recognize approximately 42% over the next 12 months, and the remainder thereafter.

Revenue Recognition

We generate revenue from two sources: (1) product revenue which includes hardware and embedded software and (2) subscription services revenue which includes Evergreen Storage subscriptions, PaaS offerings, and Cloud Block Store.

Our product revenue is derived from the sale of integrated storage hardware and operating system software. We typically recognize product revenue upon transfer of control to our customers. Products are typically shipped directly by us to customers.

Our subscription services revenue is derived from services we perform in connection with the sale of subscription services and is recognized ratably over the contractual term, which generally ranges from one to six years. The majority of our product solutions are sold with an Evergreen Storage subscription service agreement, which typically commences upon transfer of control of the corresponding products to our customers. Costs for subscription services are expensed when incurred. In addition, our Evergreen Storage subscription services agreement provides our customers who continually maintain active subscription services agreements for three years a controller refresh with each additional three year renewal. The controller refresh represents a separate performance obligation that is included within the Evergreen Storage subscription service agreement and the allocated revenue is recognized upon shipment of the controller.

Our subscription services also include the right to receive unspecified software updates and upgrades on a when-and-if-available basis, software bug fixes, replacement parts and other services related to the underlying infrastructure, as well as access to our cloud-based management and support platform. We also sell professional services such as installation and implementation consulting services and the related revenue is recognized as services are performed.

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 should 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 the 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 the performance obligations.

Warranty

We generally provide a three-year warranty on hardware and a 90-day warranty on our software embedded in the hardware. Our hardware warranty provides for parts replacement for defective components and our software warranty provides for bug fixes. Our Evergreen Storage subscription agreement provides for the same parts replacement that customers are entitled to under our warranty program, except that replacement parts are delivered according to targeted response times to minimize disruption to our customers’ critical business applications. Substantially all customers purchase Evergreen Storage subscription agreements.

Therefore, given that substantially all our product sales are sold together with Evergreen Storage subscription agreements, we generally do not have exposure related to warranty costs and no warranty reserve has been recorded.

Research and Development

Research and development costs are expensed as incurred. Research and development costs consist primarily of personnel costs including stock-based compensation expense, expensed prototype, to the extent there is no alternative use for that equipment, consulting services, depreciation of equipment used in research and development and allocated overhead costs.

Software Development Costs

We expense software development costs before technological feasibility is reached. We have determined that technological feasibility is reached shortly before the release of our products and as a result, the development costs incurred after the establishment of technological feasibility and before the release of those products have not been significant and accordingly, all software development costs have been expensed as incurred.

Software development costs also include costs incurred related to our hosted applications used to deliver our support services. Capitalization begins when the preliminary project stage is complete, management with the relevant authority authorizes and commits to the funding of the software project, and it is probable the project will be completed and the software will be used to perform the intended function. Total costs related to our hosted applications incurred to date have been insignificant and as a result no software development costs were capitalized during fiscal 2018, 2019 or 2020.

Advertising Expenses

Advertising ExpensesAdvertising costs are expensed as incurred.

Stock-Based Compensation

Stock-based compensation includes expenses related to restricted stock units (RSUs), restricted stock, stock options and purchase rights issued to employees under our employee stock purchase plan (ESPP). RSUs and restricted stock are measured at the fair market value of the underlying stock at the grant date. We determine the fair value of purchase rights issued to employees under our ESPP and our stock options under our equity plans on the date of grant utilizing the Black-Scholes option pricing model, which is impacted by the fair value of our common stock, as well as changes in assumptions regarding a number of subjective variables. These variables include the expected common stock price volatility over the term of the awards, the expected term of the awards, risk-free interest rates and expected dividend yield.

We recognize stock-based compensation expense for stock-based awards on a straight-line basis over the period during which an employee is required to provide services in exchange for the award (generally the vesting period of the award). We account for forfeitures as they occur. For stock-based awards granted to employees with a performance condition, we recognize stock-based compensation expense for these awards under the accelerated attribution method over the requisite service period when management determines it is probable that the performance condition will be satisfied.

Income Taxes

We account for income taxes using the asset and liability method. Deferred income taxes are recognized by applying enacted statutory tax rates applicable to future years to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The measurement of deferred tax assets is reduced, if necessary, by a valuation allowance to amounts that are more likely than not to be realized.

We recognize tax benefits from uncertain tax positions only if we believe that it is more likely than not that the tax position will be sustained on examination by the taxing authorities based on the technical merits of the position. The tax benefits recognized in the financial statements from such positions are then measured based on the largest benefit that has a greater than 50% likelihood of being realized upon settlement.

Recent Accounting Pronouncements

New Accounting Pronouncements Adopted in Fiscal 2020

In February 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 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 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 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 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 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 consolidated financial statements.

In August 2018, the SEC adopted the final rule under SEC Release No. 33-10532, Disclosure Update and Simplification, amending certain disclosure requirements that were redundant, duplicative, overlapping, outdated or superseded. In addition, the amendments expanded the disclosure requirements on the analysis of stockholders' equity for interim financial statements. Under the amendments, an analysis of changes in each caption of stockholders' equity presented in the balance sheet must be provided in a note or separate statement. The analysis should present a reconciliation of the beginning balance to the ending balance of each period for which a statement of comprehensive income is required to be filed. This final rule was effective on November 5, 2018. We adopted this guidance in the first quarter of fiscal 2020.

Recent Accounting Pronouncements Not Yet Effective

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 February 3, 2020. The adoption of this standard is not expected to have a material impact to our 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 on February 3, 2020. The adoption of this standard will not have a material impact to our 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 should be applied either retrospectively or prospectively. We plan to adopt this new accounting standard prospectively, and the adoption is not expected to have a material impact on our consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes - Simplifying the Accounting for Income Taxes (Topic 740) (ASU 2019-12). The amendments in ASU 2019-12 simplify the accounting for income taxes by removing certain exceptions to the general principles in Topic 740. The amendments also improve consistent application of and simplify GAAP for other areas of Topic 740 by clarifying and amending existing guidance. ASU 2019-12 is effective for us beginning on February 1, 2021. Early adoption of the amendments is permitted. We are currently evaluating the impact of ASU 2019-12 on our consolidated financial statements.

Reclassifications

Certain amounts in prior periods have been reclassified to conform with current period presentation in our consolidated balance sheets and in significant components of our deferred tax assets and liabilities in Note 13.

Basis of Presentation and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Feb. 02, 2020

Accounting Policies [Abstract]

Schedule of Changes in Allowance for Doubtful Accounts

The following table presents the changes in the allowance for doubtful accounts:


	Fiscal Year Ended
	2018		2019		2020

	(in thousands)
Allowance for doubtful accounts, beginning balance	$	2,000	$	1,062	$	660
Provision, net of cash received	482		(79)		(80)
Write-offs	(1,420)		(323)		(38)
Allowance for doubtful accounts, ending balance	$	1,062	$	660	$	542

Deferred Commissions

Changes in total deferred commissions during the periods presented are as follows (in thousands):


	Fiscal Year Ended
	2019		2020

Beginning balance	$	87,313	$	114,973
Additions	131,084		141,147
Recognition of deferred commissions	(103,424)		(116,916)
Ending balance	$	114,973	$	139,204

Schedule of Changes in Deferred Revenue

Changes in total deferred revenue during the periods presented are as follows (in thousands):


	Fiscal Year Ended
	2019		2020
Beginning balance	$	374,102	$	535,920
Additions	448,471		569,816
Recognition of deferred revenue	(286,653)		(408,448)
Ending balance	$	535,920	$	697,288

Financial Instruments (Tables)

12 Months Ended

Feb. 02, 2020

Fair Value Disclosures [Abstract]

Fair Value, Assets Measured on Recurring Basis

The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories at the end of fiscal 2019 and 2020 (in thousands):


	At the End of Fiscal 2019
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities		Restricted Cash
Level 1

Money market accounts	$	—	$	—	$	—	$	43,038	$	27,215	$	—	$	15,823
Level 2
U.S. government treasury notes	315,329		208		(315)		315,222		34,129		281,093		—
U.S. government agencies	69,114		17		(154)		68,977		9,983		58,994		—
Corporate debt securities	363,860		534		(757)		363,637		—		363,637		—
Foreign government bonds	7,965		36		—		8,001		—		8,001		—
Asset-backed securities	37,664		105		(12)		37,757		—		37,757		—
Total	$	793,932	$	900	$	(1,238)	$	836,632	$	71,327	$	749,482	$	15,823


	At the End of Fiscal 2020
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value		Cash Equivalents		Marketable Securities		Restricted Cash
Level 1

Money market accounts	$	—	$	—	$	—	$	26,355	$	11,068	$	—	$	15,287
Level 2
U.S. government treasury notes	323,751		2,146		—		325,897		—		325,897		—
U.S. government agencies	53,930		317		(3)		54,244		—		54,244		—
Corporate debt securities	452,318		3,954		(1)		456,271		3,001		453,270		—
Foreign government bonds	14,994		147		—		15,141		—		15,141		—
Asset-backed securities	87,267		699		—		87,966		—		87,966		—
Total	$	932,260	$	7,263	$	(4)	$	965,874	$	14,069	$	936,518	$	15,287

Investments Classified by Contractual Maturity Date

The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):


	At the End of Fiscal 2020
	Amortized Cost		Fair Value
Due within one year	$	418,950	$	420,769
Due in one to five years	504,689		510,079
Due in five years to ten years	5,620		5,670
Total	$	929,259	$	936,518

Schedule of Unrealized Loss on Investments

The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position at the end of fiscal 2019 and 2020, aggregated by investment category (in thousands):


	At the End of Fiscal 2019
	Less than 12 months						Greater than 12 months						Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government treasury notes	$	156,529	$	(98)	$	40,413	$	(217)	$	196,942	$	(315)
U.S. government agencies	24,892		(20)		23,600		(134)		48,492		(154)
Corporate debt securities	83,577		(152)		96,914		(605)		180,491		(757)

Asset-backed securities	11,194		(12)		—		—		11,194		(12)
Total	$	276,192	$	(282)	$	160,927	$	(956)	$	437,119	$	(1,238)


	At the End of Fiscal 2020
	Less than 12 months						Greater than 12 months						Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
U.S. government treasury notes	$	—	$	—	$	1,000	$	—	$	1,000	$	—
U.S. government agencies	4,998		(3)		—		—		4,998		(3)
Corporate debt securities	9,691		(1)		—		—		9,691		(1)


Total	$	14,689	$	(4)	$	1,000	$	—	$	15,689	$	(4)

Balance Sheet Components (Tables)

12 Months Ended

Feb. 02, 2020

Balance Sheet Components Disclosure [Abstract]

Schedule of Inventory, Current

Inventory consists of the following (in thousands):


	At the End of Fiscal
	2019		2020
Raw materials	$	3,349	$	2,974
Finished goods	41,338		35,544
Inventory	$	44,687	$	38,518

Schedule of Property and Equipment, Net

Property and equipment, net consists of the following (in thousands):


	At the End of Fiscal
	2019		2020
Test equipment	$	170,930	$	205,555
Computer equipment and software	117,330		141,387
Furniture and fixtures	6,980		8,324
Leasehold improvements	34,286		40,356
Total property and equipment	329,526		395,622
Less: accumulated depreciation and amortization	(204,173)		(272,882)
Property and equipment, net	$	125,353	$	122,740

Schedule of Intangible Assets, Net

Intangible assets, net consist of the following (in thousands):


	At the End of Fiscal
	2019										2020
	Gross Carrying Value		Accumulated Amortization		Net Carrying Amount		Gross Carrying Value		Accumulated Amortization		Net Carrying Amount
Technology patents	$	10,125	$	(6,572)	$	3,553	$	19,125	$	(8,933)	$	10,192
Developed technology	17,700		(1,135)		16,565		56,100		(8,035)		48,065
Intangible assets, net	$	27,825	$	(7,707)	$	20,118	$	75,225	$	(16,968)	$	58,257

Schedule of Expected Amortization Expenses for Intangible Assets

At the end of fiscal 2020, future expected amortization expense for intangible assets is as follows (in thousands):


Fiscal Years Ending	Estimated Future Amortization Expense
2021	$	10,804
2022	9,846
2023	9,300
2024	9,300
2025	9,300
Thereafter	9,707
Total	$	58,257

Goodwill

The change in the carrying amount of goodwill is as follows (in thousands):


	Amount
Balance as of the end of fiscal 2019	$	10,997
Goodwill acquired	26,587
Balance as of the end of fiscal 2020	$	37,584

Schedule of Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consist of the following (in thousands):


	At the End of Fiscal
	2019		2020
Taxes payable	$	7,146	$	9,012
Accrued marketing	6,173		7,679
Accrued travel and entertainment expenses	3,570		3,829

Acquisition consideration	3,725		6,149

Other accrued liabilities	19,246		20,554
Total accrued expenses and other liabilities	$	39,860	$	47,223

Convertible Senior Notes (Tables)

12 Months Ended

Feb. 02, 2020

Debt Disclosure [Abstract]

Convertible Debt

The Notes consisted of the following (in thousands):


	At the End of Fiscal
	2019		2020
Liability:
Principal	$	575,000	$	575,000
Less: debt discount, net of amortization	(116,722)		(91,378)
Less: debt issuance costs, net of amortization	(8,450)		(6,615)
Net carrying amount of the Notes	$	449,828	$	477,007

Stockholders' equity recorded at issuance:
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 (in thousands):


	Fiscal Year Ended
	2019			2020
Amortization of debt discount	$	19,611		$	25,344
Amortization of debt issuance costs	1,420			1,835
Total amortization of debt discount and debt issuance costs	21,031			27,179
Contractual interest expense	584			718
Total interest expense related to the Notes	$	21,615		$	27,897

Effective interest rate of the liability component	5.6		%	5.6		%

Leases (Tables)

12 Months Ended

Feb. 02, 2020

Leases [Abstract]

Components of lease cost

The components of lease costs were as follows (in thousands):


	Fiscal Year Ended
	2020
Fixed operating lease cost	$	33,800
Variable lease cost ⁽¹⁾	8,097
Short-term lease cost (12 months or less)	5,537
Total lease cost	$	47,434

⁽¹⁾ Variable lease cost predominantly included common area maintenance charges.

Supplemental cash flow information related to our operating leases for fiscal year 2020 as well as the weighted-average remaining lease term and weighted-average discount rate at the end of fiscal 2020 were as follows:


Cash paid for amounts included in the measurement of lease liabilities (in thousands)	$	32,785
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$	14,937
Weighted-average remaining lease term (in years)	5.58
Weighted-average discount rate	6.5%

Schedule of future operating lease payments

Future lease payments under our non-cancelable operating leases at the end of fiscal 2020 were as follows (in thousands):


Fiscal Years Ending	Operating Leases
2021	$	34,411
2022	28,489
2023	23,507
2024	17,782
2025	14,471
Thereafter	27,581
Total future lease payments	$	146,241
Less: imputed interest	(26,000)
Present value of lease liabilities	$	120,241

Schedule of future minimum rental payments for operating leases

Future lease payments under our non-cancelable operating leases at the end of fiscal 2019 were as follows (in thousands):


Fiscal Years Ending	Operating Leases
2020	$	31,297
2021	28,573
2022	24,381
2023	20,440
2024	14,780
Thereafter	30,096
Total	$	149,567

Stockholders' Equity (Tables)

12 Months Ended

Feb. 02, 2020

Equity [Abstract]

Summary of Reserved Shares of Common Stock for Future Issuance

At the end of fiscal 2020, we had reserved shares of common stock for future issuance as follows:




Shares underlying outstanding stock options			26,822,243
Shares underlying outstanding restricted stock units			25,434,597
Shares reserved for future equity awards			14,661,413
Shares reserved for future employee stock purchase plan awards			7,652,778
Total			74,571,031

Equity Incentive Plans (Tables)

12 Months Ended

Feb. 02, 2020

Share-based Payment Arrangement [Abstract]

Summary of Stock Option Activity Under Equity Incentive Plans and Related Information

A summary of the 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 (Years)	Aggregate Intrinsic Value (in thousands)
Balance at the end of fiscal 2019	35,465,543	$	8.34	5.4	$	339,591

Options exercised	(7,770,157)	5.53
Options forfeited/canceled	(873,143)	13.91
Balance at the end of fiscal 2020	26,822,243	$	8.97	3.9	$	237,803
Vested and exercisable at the end of fiscal 2020	23,665,389	$	8.12	4.4	$	229,523

Summary of Estimate Fair Value of Employee Stock Options and Employee Purchase Plan

We estimate the fair value of employee stock options and ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions:


	Fiscal Year Ended
	2018		2019	2020
Employee Stock Options
Expected term (in years)	6.1		n/a	n/a
Expected volatility	47	%	n/a	n/a
Risk-free interest rate	1.9	%	n/a	n/a
Dividend rate	—		n/a	n/a
Fair value of common stock	$12.84		n/a	n/a
Employee Stock Purchase Plan
Expected term (in years)	0.5 - 2.0		0.5 - 2.0	0.5 - 2.0
Expected volatility	35% - 39%		44% - 47%	42% - 47%
Risk-free interest rate	0.9% - 1.4%		2% - 2.8%	1.7% - 2.5%
Dividend rate	—		—	—
Fair value of common stock	$10.39 - $14.65		$20.62 - $27.66	$17.76 - $20.87

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

A summary of the RSU activity under our 2015 Plan and related information is as follows:


	Number of RSUs Outstanding	Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance at the end of fiscal 2019	21,917,550	$	17.94	$	392,515
Granted	15,780,796	18.91
Vested	(9,241,583)	17.12
Forfeited	(3,022,166)	18.93

Unvested balance at the end of fiscal 2020	25,434,597	$	18.72	$	452,736

A summary of the restricted stock activity under our 2015 Plan and related information is as follows:


	Number of Restricted Stock Outstanding	Weighted- Average Grant Date Fair Value		Aggregate Intrinsic Value (in thousands)
Unvested balance at the end of fiscal 2019	2,267,569	$	18.70	$	40,612
Granted	1,399,688	20.30
Vested	(1,284,638)	18.97
Forfeited/canceled	(255,413)	19.93
Unvested balance at the end of fiscal 2020	2,127,206	$	19.58	$	37,864

Summarizes the Components of Stock-Based Compensation

The following table summarizes the components of stock-based compensation expense recognized in the consolidated statements of operations (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Cost of revenue—product	$	1,630	$	2,951	$	3,732
Cost of revenue—subscription services	9,050		12,378		14,403
Research and development	71,229		92,484		107,658
Sales and marketing	47,687		66,350		67,560
General and administrative	21,077		36,482		33,352
Total stock-based compensation expense	$	150,673	$	210,645	$	226,705

Net Loss per Share Attributable to Common Stockholders (Tables)

12 Months Ended

Feb. 02, 2020

Earnings Per Share [Abstract]

Summary of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders

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):


	Fiscal Year Ended
	2018		2019		2020

Net loss	$	(159,878)	$	(178,362)	$	(200,987)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	211,609		232,042		252,820
Net loss per share attributable to common stockholders, basic and diluted	$	(0.76)	$	(0.77)	$	(0.79)

Summary of Weighted-average Outstanding Shares Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders

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):


	Fiscal Year Ended
	2018	2019	2020
Stock options to purchase common stock	52,424	39,928	31,315
Unvested restricted stock units	15,496	19,488	24,374
Restricted stock subject to repurchase	—	2,881	2,614
Shares related to convertible senior notes	—	17,867	21,884
Shares issuable pursuant to the ESPP	1,544	2,411	1,031
Early exercised stock options subject to repurchase	246	7	—
Total	69,710	82,582	81,218

Other Income (Expense), Net (Tables)

12 Months Ended

Feb. 02, 2020

Other Income and Expenses [Abstract]

Interest and Other Income

Other income (expense), net consists of the following (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Interest income ⁽¹⁾	$	5,424	$	18,013	$	27,241
Interest expense ⁽²⁾	(19)		(21,615)		(27,897)
Foreign currency transaction gains (losses)	5,976		(5,230)		(3,396)
Other income	64		816		669
Total other income (expense), net	$	11,445	$	(8,016)	$	(3,383)

_________________________________

(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 for fiscal 2019 and 2020.

Income Taxes (Tables)

12 Months Ended

Feb. 02, 2020

Schedule Of Geographical Breakdown Of Loss Before Provision For Income Taxes

The geographical breakdown of loss before provision for income taxes is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020

Domestic	$	(117,391)	$	(145,428)	$	(212,672)
International	(38,598)		(31,845)		18,006
Total	$	(155,989)	$	(177,273)	$	(194,666)

Schedule of Components of Provision for Income Taxes

The components of the provision for income taxes are as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Current:
State	$	525	$	571	$	538
Foreign	3,580		4,214		7,774
Total	$	4,105	$	4,785	$	8,312
Deferred:
Federal	$	—	$	(2,776)	$	(1,559)
State	—		(920)		(198)
Foreign	(216)		—		(234)
Total	$	(216)	$	(3,696)	$	(1,991)
Provision for income taxes	$	3,889	$	1,089	$	6,321

Reconciliation of the Federal Statutory Income Tax Rate and Effective Income Tax Rate

The reconciliation of the federal statutory income tax rate and effective income tax rate is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020

Tax at federal statutory rate	$	(51,314)	$	(37,227)	$	(40,880)
State tax, net of federal benefit	351		(469)		210
Stock-based compensation expense	(9,953)		(28,437)		(6,683)
Research and development tax credits	(7,629)		(10,371)		(11,033)
Foreign rate differential	18,667		12,299		2,935
Change in valuation allowance	(44,784)		85,533		61,050
Foreign on-shoring intellectual property	—		(20,371)		—
Remeasurement of deferred tax assets and liabilities due to tax reform	97,280		—		—

Other	1,271		132		722
Provision for income taxes	$	3,889	$	1,089	$	6,321

Significant Components of Deferred Tax Assets and Liabilities

The significant components of our deferred tax assets and liabilities were as follows (in thousands):


	At the End of Fiscal
	2019		2020

Deferred tax assets:
Net operating loss carryforwards	$	189,117	$	232,155
Tax credit carryover	50,848		76,209
Accruals and reserves	12,506		11,489
Deferred revenue	43,579		60,473
Stock-based compensation expense	31,743		31,906
Depreciation and amortization	23,545		18,893
Charitable contribution carryforwards	2,850		2,835
ASC 842 lease liabilities	—		25,197
Other	81		—
Total deferred tax assets	$	354,269	$	459,157
Valuation allowance	(307,475)		(385,791)
Total deferred tax assets, net of valuation allowance	$	46,794	$	73,366
Deferred tax liabilities:
Deferred commissions	$	(27,537)	$	(30,628)
Convertible debt	(14,230)		(11,226)
ASC 842 right-of-use assets	—		(23,502)
Acquired intangibles and goodwill	(3,967)		(10,421)

Other	—		(1,729)
Total deferred tax liabilities	$	(45,734)	$	(77,506)
Net deferred tax assets (liabilities)	$	1,060	$	(4,140)

Summary of Activity Related to Unrecognized Tax Benefits

The activity related to the unrecognized tax benefits is as follows (in thousands):


	Fiscal Year Ended
	2018		2019		2020
Gross unrecognized tax benefits—beginning balance	$	6,375	$	12,401	$	18,891
Decreases related to tax positions taken during prior years	(24)		(845)		(34)
Increases related to tax positions taken during prior years	619		—		408

Increases related to tax positions taken during current year	5,431		7,335		9,305
Gross unrecognized tax benefits—ending balance	$	12,401	$	18,891	$	28,570

Segment Information (Tables)

12 Months Ended

Feb. 02, 2020

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Area

(in thousands):


	Fiscal Year Ended
	2018		2019		2020

United States	$	763,719	$	979,454	$	1,184,923
Rest of the world	261,043		380,370		458,517
Total revenue	$	1,024,762	$	1,359,824	$	1,643,440

Schedule of 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):


	At the End of Fiscal
	2019		2020
United States	$	120,876	$	113,942
Rest of the world	4,477		8,798
Total long-lived assets	$	125,353	$	122,740

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Feb. 02, 2020 USD ($) numberOfFinancialInstitutions numberOfRevenueSources	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)
Concentration Risk [Line Items]
Number of financial institutions where deposits exceed federally insured limits \| numberOfFinancialInstitutions	3
Restricted cash	$ 15,287,000	$ 15,823,000	$ 14,763,000
Impairment of goodwill	0
Impairment of long-lived assets	$ 0	0	0
Useful life of deferred commissions related to subscription services revenue	6 years
Sales commission expenses	$ 142,500,000	118,400,000	102,900,000
Deferred commissions	$ 139,204,000	114,973,000	87,313,000
Expected commission (as a percent)	27.00%
Impairment of capitalized commissions	$ 0	0	0
Revenue pertaining to deferred revenue recognized in period	267,000,000.0	191,100,000
Contracted but not recognized revenue	$ 880,700,000
Performance obligation expected to be recognized as revenue in the next 12 months (percent)	42.00%
Number of revenue sources \| numberOfRevenueSources	2
Software development costs capitalized during the period	$ 0	0	0
Advertising expenses	$ 13,300,000	$ 10,700,000	$ 10,300,000
Evergreen Storage Subscription
Concentration Risk [Line Items]
Active subscription service period	3 years
Hardware
Concentration Risk [Line Items]
Standard product warranty period	3 years
Embedded Software
Concentration Risk [Line Items]
Standard product warranty period	90 days
Minimum \| Technology patents
Concentration Risk [Line Items]
Estimated useful life of intangible assets	5 years
Maximum \| Technology patents
Concentration Risk [Line Items]
Estimated useful life of intangible assets	7 years
Test equipment
Concentration Risk [Line Items]
Property and equipment, useful life	2 years
Computer equipment and software \| Minimum
Concentration Risk [Line Items]
Property and equipment, useful life	2 years
Computer equipment and software \| Maximum
Concentration Risk [Line Items]
Property and equipment, useful life	3 years
Furniture and fixtures
Concentration Risk [Line Items]
Property and equipment, useful life	7 years
Customer concentration risk \| Sales revenue net \| 1 Channel Partner
Concentration Risk [Line Items]
Concentration risk percentage		11.00%
Customer concentration risk \| Accounts receivable \| 1 Channel Partner
Concentration Risk [Line Items]
Concentration risk percentage		10.00%
Customer concentration risk \| Accounts receivable \| 1 Customer
Concentration Risk [Line Items]
Concentration risk percentage	12.00%	10.00%

Basis of Presentation and Summary of Significant Accounting Policies - Revenue Contract Term (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-02-03 - Subscription Service Revenue	Feb. 02, 2020
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue contractual term	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue contractual term	6 years

Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for doubtful accounts, beginning balance	$ 660	$ 1,062	$ 2,000
Provision, net of cash received	(80)	(79)	482
Write-offs	(38)	(323)	(1,420)
Allowance for doubtful accounts, ending balance	$ 542	$ 660	$ 1,062

Basis of Presentation and Summary of Significant Accounting Policies - Deferred Commissions (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019
Deferred Commissions [Roll Forward]
Beginning balance	$ 114,973	$ 87,313
Additions	141,147	131,084
Recognition of deferred commissions	(116,916)	(103,424)
Ending balance	$ 139,204	$ 114,973

Basis of Presentation and Summary of Significant Accounting Policies - Deferred Revenue (Details) - Product Revenue And Support Subscription Revenue - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019
Beginning balance	$ 535,920	$ 374,102
Additions	569,816	448,471
Recognition of deferred revenue	(408,448)	(286,653)
Ending balance	$ 697,288	$ 535,920

Basis of Presentation and Summary of Significant Accounting Policies - Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Feb. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets	$ 112,854
Lease liabilities	$ 120,241
Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use assets		$ 124,500
Lease liabilities		$ 130,600

Financial Instruments - Fair Value of Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	$ 932,260	$ 793,932
Gross Unrealized Gains	7,263	900
Gross Unrealized Losses	(4)	(1,238)
Fair Value	965,874	836,632
Cash Equivalents	14,069	71,327
Marketable securities	936,518	749,482
Restricted cash	15,287	15,823	$ 14,763
Restricted Cash	15,287	15,823
Corporate Debt Securities \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	452,318	363,860
Gross Unrealized Gains	3,954	534
Gross Unrealized Losses	(1)	(757)
Fair Value	456,271	363,637
Cash Equivalents	3,001	0
Marketable securities	453,270	363,637
Restricted Cash	0	0
Foreign Government Debt [Member] \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	14,994	7,965
Gross Unrealized Gains	147	36
Gross Unrealized Losses	0	0
Fair Value	15,141	8,001
Cash Equivalents	0	0
Marketable securities	15,141	8,001
Restricted Cash	0	0
US Government Agencies Debt Securities \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	53,930	69,114
Gross Unrealized Gains	317	17
Gross Unrealized Losses	(3)	(154)
Fair Value	54,244	68,977
Cash Equivalents	0	9,983
Marketable securities	54,244	58,994
Restricted Cash	0	0
US Government Debt Securities \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	323,751	315,329
Gross Unrealized Gains	2,146	208
Gross Unrealized Losses	0	(315)
Fair Value	325,897	315,222
Cash Equivalents	0	34,129
Marketable securities	325,897	281,093
Restricted Cash	0	0
Money Market Funds [Member] \| Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value	26,355	43,038
Cash Equivalents	11,068	27,215
Marketable securities	0	0
Asset-backed Securities \| Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Amortized Cost	87,267	37,664
Gross Unrealized Gains	699	105
Gross Unrealized Losses	0	(12)
Fair Value	87,966	37,757
Cash Equivalents	0	0
Marketable securities	87,966	37,757
Restricted Cash	$ 0	$ 0

Financial Instruments - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Details) (Details) $ in Thousands	Feb. 02, 2020 USD ($)
Fair Value Disclosures [Abstract]
Due within one year, Amortized Cost	$ 418,950
Due in one to five years, Amortized Cost	504,689
Due in five to ten years, Amortized Cost	5,620
Total, Amortized Cost	929,259
Due within one year, Fair Value	420,769
Due in one to five years, Fair Value	510,079
Due in five to ten years, Fair Value	5,670
Total, Fair Value	$ 936,518

Financial Instruments - Schedule of Gross Unrealized Losses and Fair Values for Investments that were in Continuous Unrealized Loss Position for Less Than 12 Months, Aggregated by Investments Category (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less then 12 months	$ 14,689	$ 276,192
Unrealized Loss, Less then 12 months	(4)	(282)
Fair Value Greater then 12 months	1,000	160,927
Unrealized Loss, Greater then 12 months	0	(956)
Fair Value Total	15,689	437,119
Unrealized Loss Total	(4)	(1,238)
Asset-backed Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less then 12 months		11,194
Unrealized Loss, Less then 12 months		(12)
Fair Value Greater then 12 months		0
Unrealized Loss, Greater then 12 months		0
Fair Value Total		11,194
Unrealized Loss Total		(12)
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less then 12 months	9,691	83,577
Unrealized Loss, Less then 12 months	(1)	(152)
Fair Value Greater then 12 months	0	96,914
Unrealized Loss, Greater then 12 months	0	(605)
Fair Value Total	9,691	180,491
Unrealized Loss Total	(1)	(757)
US Government Agencies Debt Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less then 12 months	4,998	24,892
Unrealized Loss, Less then 12 months	(3)	(20)
Fair Value Greater then 12 months	0	23,600
Unrealized Loss, Greater then 12 months	0	(134)
Fair Value Total	4,998	48,492
Unrealized Loss Total	(3)	(154)
US Government Debt Securities
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less then 12 months	0	156,529
Unrealized Loss, Less then 12 months	0	(98)
Fair Value Greater then 12 months	1,000	40,413
Unrealized Loss, Greater then 12 months	0	(217)
Fair Value Total	1,000	196,942
Unrealized Loss Total	$ 0	$ (315)

Business Combinations (Details) - USD ($) $ in Thousands	1 Months Ended				12 Months Ended
Business Combinations (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Apr. 30, 2019	Aug. 31, 2018	Apr. 30, 2018	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Business Acquisition [Line Items]
Purchase consideration, net of cash acquired					$ 51,594	$ 13,899	$ 0
Goodwill					37,584	10,997
Acquisition consideration					$ 6,149	$ 3,725
StorReduce, Inc.
Business Acquisition [Line Items]
Cash consideration transferred			$ 20,500
Fees assumed associated with the transaction			1,100
Long-term debt assumed and subsequently paid off			6,100
Goodwill			11,000
Net liabilities assumed			4,500
Deferred tax liabilities assumed			3,700
Acquisition consideration			$ 3,700
StorReduce, Inc. \| Restricted Stock Units (RSUs)
Business Acquisition [Line Items]
Equity interests issued and issuable, shares issued (in shares)			622,482
Equity interests issued and issuable			$ 13,600
StorReduce, Inc. \| Developed technology
Business Acquisition [Line Items]
Finite-lived intangibles acquired			$ 17,700
Finite-lived intangibles acquired, amortization period			7 years
Compuverde AB
Business Acquisition [Line Items]
Acquisition related costs		$ 500
Purchase consideration, net of cash acquired		47,900
Long-term debt assumed and subsequently paid off		11,600
Goodwill		26,600
Net liabilities assumed		11,700
Deferred tax liabilities assumed		5,400
Consideration to be transferred		$ 15,900
Term of payments		2 years
Compuverde AB \| Restricted Stock Units (RSUs)
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
Finite-lived intangibles acquired, amortization period				7 years

Balance Sheet Components - Inventory (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019
Balance Sheet Components [Abstract]
Raw materials	$ 2,974	$ 3,349
Finished goods	35,544	41,338
Inventory	$ 38,518	$ 44,687

Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Property Plant And Equipment [Line Items]
Total property and equipment	$ 395,622	$ 329,526
Less: accumulated depreciation and amortization	(272,882)	(204,173)
Property and equipment, net	122,740	125,353
Depreciation and amortization	80,400	68,300	$ 60,200
Test equipment
Property Plant And Equipment [Line Items]
Total property and equipment	205,555	170,930
Computer equipment and software
Property Plant And Equipment [Line Items]
Total property and equipment	141,387	117,330
Furniture and fixtures
Property Plant And Equipment [Line Items]
Total property and equipment	8,324	6,980
Leasehold improvements
Property Plant And Equipment [Line Items]
Total property and equipment	$ 40,356	$ 34,286

Balance Sheet Components - Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 75,225	$ 27,825
Accumulated Amortization	(16,968)	(7,707)
Net Carrying Amount	58,257	20,118
Intangible assets amortization expense	9,300	2,600	$ 1,500
Technology patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	19,125	10,125
Accumulated Amortization	(8,933)	(6,572)
Net Carrying Amount	10,192	3,553
Portfolio of intangible assets acquired	$ 9,000
Weighted average remaining useful life	3 years 8 months 12 days
Finite-lived intangibles acquired, amortization period	7 years
Developed technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 56,100	17,700
Accumulated Amortization	(8,035)	(1,135)
Net Carrying Amount	$ 48,065	$ 16,565
Weighted average remaining useful life	6 years

Balance Sheet Components - Schedule of Expected Amortization Expenses for Intangible Assets (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019
Balance Sheet Components Disclosure [Abstract]
2021	$ 10,804
2022	9,846
2023	9,300
2024	9,300
2025	9,300
Thereafter	9,707
Net Carrying Amount	$ 58,257	$ 20,118

Balance Sheet Components - Goodwill (Details) $ in Thousands	12 Months Ended
	Feb. 02, 2020 USD ($)
Goodwill
Goodwill, beginning balance	$ 10,997
Goodwill acquired	26,587
Goodwill, ending balance	$ 37,584

Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Feb. 02, 2020	Jan. 31, 2019
Balance Sheet Components Disclosure [Abstract]
Taxes payable	$ 9,012	$ 7,146
Accrued marketing	7,679	6,173
Accrued travel and entertainment expenses	3,829	3,570
Acquisition consideration	6,149	3,725
Other accrued liabilities	20,554	19,246
Total accrued expenses and other liabilities	$ 47,223	$ 39,860

Convertible Senior Notes (Details)	1 Months Ended	12 Months Ended
Convertible Senior Notes (Details)	Apr. 30, 2018 USD ($) day $ / shares shares	Feb. 02, 2020 USD ($) $ / shares	Oct. 31, 2019 $ / shares	Apr. 30, 2019 $ / shares	Jan. 31, 2019 USD ($)	Apr. 04, 2018 $ / shares
Debt Instrument [Line Items]
Debt issuance costs, net of amortization	$ 12,900,000
Capped Call
Debt Instrument [Line Items]
Payment to enter into agreement	64,600,000
Convertible Senior Notes
Debt Instrument [Line Items]
Principal amount		$ 575,000,000.0
Debt issuance costs, net of amortization	9,800,000	6,615,000			$ 8,450,000
Additional Paid-In Capital
Debt Instrument [Line Items]
Debt issuance costs, net of amortization	$ 3,100,000	$ 3,068,000
Common stock
Debt Instrument [Line Items]
Closing price of stock (in dollars per share) \| $ / shares		$ 17.80	$ 17.80			$ 19.83
Common stock \| Capped Call
Debt Instrument [Line Items]
Exercise price (in dollars per share) \| $ / shares	$ 39.66			$ 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
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%
Redemption percentage of principal amount of Notes to be redeemed	100.00%
Convertible debt, fair value based on the closing trading price per $100 of the Notes		$ 582,600,000			$ 558,200,000
If-converted value		$ 389,500,000
Remaining term of the notes		38 months
Convertible Senior Notes \| Any Fiscal Quarter Commencing After the Fiscal Quarter Ending on July 31, 2018
Debt Instrument [Line Items]
Threshold percentage of stock price trigger	130.00%
Convertible Senior Notes \| Common stock
Debt Instrument [Line Items]
Converted Instrument (in shares) \| shares	21,884,155
Conversion ratio (in shares per $1,000 principal amount)	38.0594
Conversion price (in dollars per share) \| $ / shares	$ 26.27
Convertible Senior Notes \| Common stock \| 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 \| Common stock \| 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 \| Common stock \| Immediately Preceding the Date on Which We Provide Notice of Redemption
Debt Instrument [Line Items]
Threshold trading days \| day	2

Convertible Senior Notes - Allocation of Notes (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Apr. 30, 2018
Liability:
Less: debt issuance costs, net of amortization			$ (12,900)
Stockholders' equity recorded at issuance:
Allocated value of the conversion feature		$ 133,265
Less: debt issuance costs			(12,900)
Convertible Senior Notes
Liability:
Principal	$ 575,000	575,000
Less: debt discount, net of amortization	(91,378)	(116,722)
Less: debt issuance costs, net of amortization	(6,615)	(8,450)	(9,800)
Net carrying amount of the Notes	477,007	449,828
Stockholders' equity recorded at issuance:
Less: debt issuance costs	(6,615)	$ (8,450)	(9,800)
Additional Paid-In Capital
Liability:
Less: debt issuance costs, net of amortization	(3,068)		(3,100)
Stockholders' equity recorded at issuance:
Allocated value of the conversion feature	136,333
Less: debt issuance costs	(3,068)		$ (3,100)
Additional paid-in capital	$ 133,265

Convertible Senior Notes - Interest Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Debt Instrument [Line Items]
Total amortization of debt discount and debt issuance costs	$ 27,179	$ 21,031	$ 0
Convertible Senior Notes
Debt Instrument [Line Items]
Amortization of debt discount	25,344	19,611
Amortization of debt issuance costs	1,835	1,420
Total amortization of debt discount and debt issuance costs	27,179	21,031
Contractual interest expense	718	584
Total interest expense related to the Notes	$ 27,897	$ 21,615
Effective interest rate of the liability component ( as a percent)	5.60%	5.60%

Commitments and Contingencies - Additional Information (Details) - USD ($)	Feb. 02, 2020	Jan. 31, 2019
Loss Contingencies [Line Items]
Non-cancelable purchase obligation related to software services	$ 36,600,000	$ 21,400,000
Outstanding letters of credit	11,500,000	10,800,000
Loss contingency	0
Letter of Credit
Loss Contingencies [Line Items]
Principal amount		$ 500,000
Convertible Senior Notes
Loss Contingencies [Line Items]
Principal amount	$ 575,000,000.0

Leases - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
Leases - Narrative (Details) - USD ($) $ in Millions	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Lessee, Lease, Description [Line Items]
Rent expense recognized under operating leases		$ 25.6	$ 19.4
Undiscounted cash flows of leases that have not yet commenced	$ 30.3
Office Facility
Lessee, Lease, Description [Line Items]
Additional lease obligation	19.4
Data Center
Lessee, Lease, Description [Line Items]
Additional lease obligation	$ 22.4
Minimum
Lessee, Lease, Description [Line Items]
Term of contract for leases that have not yet commenced	5 years
Maximum
Lessee, Lease, Description [Line Items]
Term of contract for leases that have not yet commenced	12 years

Leases - Lease costs (Details) $ in Thousands	12 Months Ended
Leases - Lease costs (Details) $ in Thousands	Feb. 02, 2020 USD ($)
Leases [Abstract]
Fixed operating lease cost	$ 33,800
Variable lease cost	8,097
Short-term lease cost (12 months or less)	5,537
Total lease cost	$ 47,434

Leases - Future lease payments under noncancelable leases (Details) $ in Thousands	Feb. 02, 2020 USD ($)
Leases [Abstract]
2021	$ 34,411
2022	28,489
2023	23,507
2024	17,782
2025	14,471
Thereafter	27,581
Total future lease payments	146,241
Less: imputed interest	(26,000)
Present value of lease liabilities	$ 120,241

Leases - Schedule of aggregate future minimum payments under noncancelable 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	$ 149,567

Leases - Lease cash flow information (Details) $ in Thousands	12 Months Ended
	Feb. 02, 2020 USD ($)
Leases [Abstract]
Cash paid for amounts included in the measurement of lease liabilities (in thousands)	$ 32,785
Operating lease right-of-use assets obtained in exchange for operating lease liabilities	$ 14,937
Weighted-average remaining lease term (in years)	5 years 6 months 29 days
Weighted-average discount rate	6.50%

Stockholders' Equity - Additional Information (Details) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	Dec. 31, 2018	Apr. 30, 2018 USD ($) shares	Feb. 02, 2020 USD ($) class $ / shares shares	Oct. 31, 2019 $ / shares	Aug. 31, 2019 USD ($)	Jan. 31, 2019 $ / shares shares	Apr. 04, 2018 $ / shares
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)			20,000,000			20,000,000
Preferred stock, shares issued (in shares)			0			0
Preferred stock, shares outstanding (in shares)			0			0
Number of classes of stock \| class			2
Common stock, shares authorized (in shares)			2,250,000,000			2,250,000,000
Class A common stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			2,000,000,000			2,000,000,000
Common stock, par value per share (in dollars per share) \| $ / shares			$ 0.0001			$ 0.0001
Common stock, shares issued (in shares)			264,008,206			243,524,000
Common stock, shares outstanding (in shares)			264,008,000			243,524,000
Value approved for repurchase \| $					$ 150.0
Stock repurchased and retired (in shares)		1,008,573	867,657
Stock repurchased and retired, average cost (in dollars per share) \| $ / shares			$ 17.29
Stock repurchased and retired, value \| $		$ 20.0	$ 15.0
Remaining authorized reourchase amount \| $			$ 135.0
Closing price of stock (in dollars per share) \| $ / shares			$ 17.80	$ 17.80			$ 19.83
Class B common stock
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			250,000,000			250,000,000
Common stock, par value per share (in dollars per share) \| $ / shares			$ 0.0001			$ 0.0001
Convertible Stock, Automatic Conversion, Portion Of Outstanding Stock, Percentage	10.00%

Stockholders' Equity - Summary of Reserved Shares of Common Stock for Future Issuance (Details) - shares	Feb. 02, 2020	Jan. 31, 2019
Class of Stock [Line Items]
Shares underlying outstanding equity awards (in shares)	26,822,243	35,465,543
Shares reserved for future equity awards (in shares)	74,571,031
Employee stock purchase plan
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	7,652,778
Restricted Stock Units (RSUs)
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	25,434,597
Employee Stock Options
Class of Stock [Line Items]
Shares reserved for future equity awards (in shares)	14,661,413

Equity Incentive Plans - Additional Information (Details)	12 Months Ended
	Feb. 02, 2020 plan shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of equity incentive plans \| plan	2
2015 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards of vest expire period	10 years
2015 Equity Incentive Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards of vest period	2 years
2015 Equity Incentive Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards of vest period	4 years
2015 Equity Incentive Plan \| Common stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares initially reserved for issuance (in shares) \| shares	27,000,000
Increase in shares reserved by percentage of capital stock	5.00%

Equity Incentive Plans - 2015 Employee Stock Purchase Plan (Details)		1 Months Ended		12 Months Ended
	Mar. 16, 2016	Feb. 28, 2019 USD ($)	Aug. 31, 2015 USD ($) shares	Feb. 02, 2020 USD ($) numberOfFinancialInstitutions shares	Jan. 31, 2019 USD ($)	Jan. 31, 2018 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future equity awards (in shares) \| shares				74,571,031
Stock-based compensation expense				$ 226,705,000	$ 210,645,000	$ 150,673,000
Unrecognized compensation cost related to stock awards, weighted-average period				1 year 4 months 24 days
2015 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future equity awards (in shares) \| shares				5,000,000
Dollar cap per purchase period		$ 7,500
Employee stock purchase plan offering period	24 months
Number of purchase periods \| numberOfFinancialInstitutions				4
Purchase period, term				6 months
ESPP modification charge				$ 13,600,000		9,000,000.0
Stock-based compensation expense				24,500,000	$ 35,400,000	$ 18,300,000
Unrecognized stock-based compensation expense				$ 27,600,000
Unrecognized compensation cost related to stock awards, weighted-average period				1 year 7 months 6 days
Common stock \| 2015 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future equity awards (in shares) \| shares			3,500,000
Increase in shares reserved by percentage of capital stock			1.00%
Payroll deductions percentage			30.00%
Share cap for ESPP at purchase date (in shares) \| shares			3,000
Calendar year gap for ESPP contribution amount			$ 25,000
Purchase price as percentage of fair market value of common stock			85.00%

Equity Incentive Plans - Summary of Activity Under the Equity Incentive Plans (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019
Options Outstanding, Number of Shares
Balance at start of year (in shares)	35,465,543
Options exercised (in shares)	(7,770,157)
Options cancelled/forfeited (in shares)	(873,143)
Balance at end of year (in shares)	26,822,243	35,465,543
Vested and exercisable (in shares)	23,665,389
Options Outstanding, Weighted- Average Exercise Price
Balance at start of year (in dollars per share)	$ 8.34
Options exercised (in dollars per share)	5.53
Options cancelled/forfeited (in dollars per share)	13.91
Balance at end of year (in dollars per share)	8.97	$ 8.34
Vested and exercisable (in dollars per share)	$ 8.12
Weighted- Average Remaining Contractual Life (Years)
Weighted Average Remaining Contractual Life (Years)	3 years 10 months 24 days	5 years 4 months 24 days
Weighted Average Remaining Contractual Life (Years), Vested and exercisable	4 years 4 months 24 days
Aggregate Intrinsic Value (in thousands)
Aggregate Intrinsic Value	$ 237,803	$ 339,591
Aggregate Intrinsic Value, Vested and exercisable	$ 229,523

Equity Incentive Plans - Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018	Oct. 31, 2019	Apr. 04, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 226,705	$ 210,645	$ 150,673
Number of options granted, net of cancellations (in shares)	0	0
Unrecognized compensation cost related to stock awards, weighted-average period	1 year 4 months 24 days
Shares underlying outstanding equity awards (in shares)	26,822,243	35,465,543
Common stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Closing price of stock (in dollars per share)	$ 17.80			$ 17.80	$ 19.83
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Intrinsic value of exercised options	$ 106,600	$ 165,000	104,900
Stock-based compensation expense	15,800	32,000	$ 49,000
Weighted-average grant date fair value of options granted (in dollars per share)			$ 5.57
Total grant date fair value of options vested	34,200	45,600	$ 42,500
Unrecognized compensation cost	11,000
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 161,800	$ 119,900	$ 83,400
Unrecognized compensation cost related to stock awards, weighted-average period	3 years

Equity Incentive Plans - Summary of Estimate Fair Values (Details) - $ / shares	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)			6 years 1 month 6 days
Expected volatility			47.00%
Risk-free interest rate			1.90%
Dividend rate			0.00%
Fair value of common stock (in dollars per share)			$ 12.84
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected volatility, minimum	42.00%	44.00%	35.00%
Expected volatility, maximum	47.00%	47.00%	39.00%
Risk-free interest rate, minimum	1.70%	2.00%	0.90%
Risk-free interest rate, maximum	2.50%	2.80%	1.40%
Dividend rate	0.00%	0.00%	0.00%
Employee Stock Purchase Plan \| Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	6 months	6 months	6 months
Fair value of common stock (in dollars per share)	$ 17.76	$ 20.62	$ 10.39
Employee Stock Purchase Plan \| Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	2 years	2 years	2 years
Fair value of common stock (in dollars per share)	$ 20.87	$ 27.66	$ 14.65

Equity Incentive Plans - Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018	Feb. 02, 2020	Jan. 31, 2019
Weighted-Average Grant Date Fair Value
Stock-based compensation expense	$ 226,705	$ 210,645	$ 150,673
Unrecognized compensation cost related to stock awards, weighted-average period	1 year 4 months 24 days
Restricted Stock Units (RSUs)
Number of RSUs Outstanding
Unvested, beginning balance (in shares)	21,917,550
Granted (in shares)	15,780,796
Vested (in shares)	(9,241,583)
Forfeited (in shares)	(3,022,166)
Unvested, ending balance (in shares)	25,434,597	21,917,550
Weighted-Average Grant Date Fair Value
Unvested, beginning balance (in dollars per share)	$ 17.94
Granted (in dollars per share)	18.91
Vested (in dollars per share)	17.12
Forfeited (in dollars per share)	18.93
Unvested, ending balance (in dollars per share)	$ 18.72	$ 17.94
Aggregate Intrinsic Value (in thousands)				$ 452,736	$ 392,515
Stock-based compensation expense	$ 161,800	$ 119,900	83,400
Unrecognized employee compensation cost				$ 435,200
Unrecognized compensation cost related to stock awards, weighted-average period	3 years
Awards outstanding (in shares)	25,434,597	21,917,550		25,434,597	21,917,550
Restricted Stock
Number of RSUs Outstanding
Unvested, beginning balance (in shares)	2,267,569
Granted (in shares)	1,399,688
Vested (in shares)	(1,284,638)
Forfeited (in shares)	(255,413)
Unvested, ending balance (in shares)	2,127,206	2,267,569
Weighted-Average Grant Date Fair Value
Unvested, beginning balance (in dollars per share)	$ 18.70
Granted and converted (in dollars per share)	20.30
Vested (in dollars per share)	18.97
Forfeited (in dollars per share)	19.93
Unvested, ending balance (in dollars per share)	$ 19.58	$ 18.70
Aggregate Intrinsic Value (in thousands)				$ 37,864	$ 40,612
Stock-based compensation expense	$ 24,600	$ 23,300
Unrecognized employee compensation cost				$ 14,200
Unrecognized compensation cost related to stock awards, weighted-average period	1 year 9 months 18 days
Awards outstanding (in shares)	2,127,206	2,267,569		2,127,206	2,267,569
Total grant date fair value of options vested	$ 24,200	$ 3,600
Performance Vesting Conditions \| Restricted Stock
Number of RSUs Outstanding
Granted (in shares)	1,399,688
Earned \| Restricted Stock
Weighted-Average Grant Date Fair Value
Earned (in shares)	930,678
Performance Vesting At Maximum \| Restricted Stock
Number of RSUs Outstanding
Granted (in shares)	1,291,194
Weighted-Average Grant Date Fair Value
Award vesting rights, percentage	100.00%
Performance Vesting At Maximum \| Minimum \| Restricted Stock
Weighted-Average Grant Date Fair Value
Award vesting rights, percentage	0.00%
Performance Vesting At Maximum \| Maximum \| Restricted Stock
Weighted-Average Grant Date Fair Value
Award vesting rights, percentage	160.00%
Previously Issued Performance Awards \| Restricted Stock
Number of RSUs Outstanding
Granted (in shares)	108,494
Fair value \| Restricted Stock Units (RSUs)
Weighted-Average Grant Date Fair Value
Unrecognized employee compensation cost			$ 75,500	$ 164,100	$ 184,800

Equity Incentive Plans - Summary of Stock-Based Compensation Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 226,705	$ 210,645	$ 150,673
Cost of revenue—product
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	3,732	2,951	1,630
Cost of revenue—subscription services
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	14,403	12,378	9,050
Research and development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	107,658	92,484	71,229
Sales and marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	67,560	66,350	47,687
General and administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 33,352	$ 36,482	$ 21,077

Net Loss per Share Attributable to Common Stockholders - Summary of Computation of Basic and Diluted Net Loss per Share Attributable to Common Stockholders (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

^[1]

Earnings Per Share [Abstract]

Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)

$ (200,987)

$ (178,362)

$ (159,878)

252,820

232,042

^[1]

211,609

Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)

$ (0.79)

$ (0.77)

^[1]

$ (0.76)

[1]

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Net Loss per Share Attributable to Common Stockholders - Summary of Weighted-average Outstanding Shares Excluded from Computation of Diluted Net Loss per Share Attributable to Common Stockholders (Details) - shares shares in Thousands	12 Months Ended
	Feb. 02, 2020	Jan. 31, 2019	Jan. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	81,218	82,582	69,710
Stock options to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	31,315	39,928	52,424
Restricted Stock Units (RSUs)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	24,374	19,488	15,496
Shares issuable pursuant to the ESPP
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	1,031	2,411	1,544
Early exercised stock options subject to repurchase
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	0	7	246
Restricted Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	2,614	2,881	0
Senior Notes
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities (In shares)	21,884	17,867	0

Other Income (Expense), Net (Details) - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

Other Income and Expenses [Abstract]

Interest income

$ 27,241

$ 18,013

$ 5,424

Interest expense

(27,897)

(21,615)

(19)

Foreign currency transaction gains (losses)

(3,396)

(5,230)

5,976

Other income

669

816

64

Total other income (expense), net

$ (3,383)

$ (8,016)

$ 11,445

^[1]

[1]

Income Taxes - Schedule of Geographical Breakdown of Income (Loss) before Provision for Income Taxes (Details) - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

Loss before provision for income taxes

Domestic

$ (212,672)

$ (145,428)

$ (117,391)

International

18,006

(31,845)

(38,598)

$ (194,666)

$ (177,273)

$ (155,989)

^[1]

[1]

Income Taxes - Components of Provision for Income Taxes (Details) - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

Current:

State

$ 538

$ 571

$ 525

Foreign

7,774

4,214

3,580

Total

8,312

4,785

4,105

Deferred:

Federal

(1,559)

(2,776)

0

State

(198)

(920)

0

Foreign

(234)

0

(216)

Deferred Income Tax Expense (Benefit)

(1,991)

(3,696)

(216)

Provision for income taxes

$ 6,321

$ 1,089

$ 3,889

^[1]

[1]

Income Taxes - Reconciliation of the Federal Statutory Income Tax Rate and Effective Income Tax Rate (Details) - USD ($)
$ in Thousands

12 Months Ended

Feb. 02, 2020

Jan. 31, 2019

Jan. 31, 2018

Tax at federal statutory rate

$ (40,880)

$ (37,227)

$ (51,314)

State tax, net of federal benefit

210

(469)

351