Pure Storage (PSTG) 10-Q 11 Dec 15 2015 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Oct. 31, 2015	Dec. 03, 2015
Document And Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Trading Symbol	PSTG
Entity Registrant Name	Pure Storage, Inc.
Entity Central Index Key	1,474,432
Current Fiscal Year End Date	--01-31
Entity Filer Category	Non-accelerated Filer
Class A Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		28,750,000
Class B Common Stock
Document And Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		161,390,400

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 573,307	$ 192,707
Accounts receivable, net of allowance of $210 and $566 as of January 31, 2015 and October 31, 2015	112,126	59,032
Inventory	25,549	21,605
Deferred commissions, current	13,612	9,431
Prepaid expenses and other current assets	14,028	11,195
Total current assets	738,622	293,970
Property and equipment, net	47,117	39,859
Intangible assets, net	7,306	8,284
Deferred income taxes, non-current	4,886	5,529
Other long-term assets	20,097	14,177
Total assets	818,028	361,819
Current liabilities:
Accounts payable	21,684	11,007
Accrued compensation and benefits	25,030	13,811
Accrued expenses and other liabilities	14,440	6,106
Deferred revenue, current	71,481	32,199
Liability related to early exercised stock options	4,942	6,485
Deferred income taxes, current	5,186	5,829
Total current liabilities	142,763	75,437
Deferred revenue—non-current	90,175	41,470
Other long-term liabilities	1,136	802
Total liabilities	234,074	117,709
Commitments and contingencies (Note 5)	0	0
Convertible preferred stock, par value of $0.0001 per share— 123,880 and no shares authorized as of January 31, 2015 and October 31, 2015; 122,281 and no shares issued and outstanding as of January 31, 2015 and October 31, 2015	0	543,940
Stockholders’ (deficit) equity:
Preferred stock, par value of $0.0001 per share— no and 20,000 shares authorized as of January 31, 2015 and October 31, 2015; no shares issued and outstanding as of January 31, 2015 and October 31, 2015	0	0
Class A and Class B common stock, par value of $0.0001 per share— 230,812 (Class A 1, Class B 230,811) and 2,250,000 (Class A 2,000,000, Class B 250,000) shares authorized as of January 31, 2015 and October 31, 2015; 36,465 (Class B 36,465) and 189,980 (Class A 28,750, Class B 161,230) shares issued and outstanding as of January 31, 2015 and October 31, 2015	19	4
Additional paid-in capital	1,094,976	41,749
Accumulated deficit	(511,041)	(341,583)
Total stockholders’ (deficit) equity	583,954	(299,830)
Total liabilities, convertible preferred stock, and stockholders’ (deficit) equity	$ 818,028	$ 361,819

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Accounts receivable, net of allowance	$ 566	$ 210
Convertible preferred stock, par value per share	$ 0.0001	$ 0.0001
Convertible preferred stock, shares authorized	0	123,879,952
Convertible preferred stock, shares issued	0	122,280,679
Convertible preferred stock, shares outstanding	0	122,280,679
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	20,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, shares authorized	2,250,000,000	230,812,000
Common stock, shares issued	189,980,000	36,465,000
Common stock, shares outstanding	189,980,000	36,465,000
Class A Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	2,000,000,000	1,000
Common stock, shares issued	28,750,000
Common stock, shares outstanding	28,750,000
Class B Common Stock
Common stock, par value per share	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000,000	230,811,000
Common stock, shares issued	161,229,673	36,465,000
Common stock, shares outstanding	161,229,673	36,465,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Revenue:
Product	$ 113,573	$ 43,753	$ 248,383	$ 97,006
Support	17,791	5,436	41,719	11,595
Total revenue	131,364	49,189	290,102	108,601
Cost of revenue:
Product	41,995	16,676	92,348	39,284
Support	9,058	3,827	23,479	8,751
Total cost of revenue	51,053	20,503	115,827	48,035
Gross profit	80,311	28,686	174,275	60,566
Operating expenses:
Research and development	43,065	22,863	112,935	63,396
Sales and marketing	63,803	38,224	171,647	109,787
General and administrative	29,022	7,415	56,941	21,834
Total operating expenses	135,890	68,502	341,523	195,017
Loss from operations	(55,579)	(39,816)	(167,248)	(134,451)
Other income (expense), net	(171)	(410)	(1,245)	(717)
Loss before provision for income taxes	(55,750)	(40,226)	(168,493)	(135,168)
Provision for income taxes	751	171	965	428
Net loss	$ (56,501)	$ (40,397)	$ (169,458)	$ (135,596)
Net loss per share attributable to common stockholders, basic and diluted	$ (0.76)	$ (1.43)	$ (3.60)	$ (5.07)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	74,565	28,280	47,109	26,769

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (169,458)	$ (135,596)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	23,118	9,751
Stock-based compensation expense	36,198	17,241
Contribution of common stock to the Pure Good Foundation	11,900	0
Other	0	3
Changes in operating assets and liabilities:
Accounts receivable, net	(53,094)	(30,735)
Inventory	(3,420)	(13,072)
Deferred commissions	(8,472)	(4,063)
Prepaid expenses and other assets	(2,065)	(2,368)
Accounts payable	10,224	4,575
Accrued compensation and other liabilities	17,216	7,670
Deferred revenue	87,987	36,918
Net cash used in operating activities	(49,866)	(109,676)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(29,495)	(30,902)
Purchases of intangible assets	0	(9,125)
Increase in restricted cash	(2,484)	(1,613)
Net cash used in investing activities	(31,979)	(41,640)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from initial public offering, net of issuance costs	459,425	0
Proceeds from issuance of convertible preferred stock, net of issuance costs	0	280,820
Net proceeds from exercise of stock options, including proceeds from repayment of promissory notes	4,710	7,167
Repurchase of common stock in connection with a tender offer	0	(30,120)
Payments of deferred offering costs	(1,690)	0
Net cash provided by financing activities	462,445	257,867
Net increase in cash and cash equivalents	380,600	106,551
Cash and cash equivalents, beginning of period	192,707	130,885
Cash and cash equivalents, end of period	573,307	237,436
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for income taxes	820	332
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION
Conversion of convertible preferred stock to common stock upon initial public offering	543,940	0
Purchase of property and equipment	1,750	1,462
Vesting of early exercised stock options and restricted stock awards	1,543	732
Cashless exercise of stock options during a tender offer	0	2,057
Unpaid deferred offering costs	$ 2,748	$ 0

Business Overview

Business Overview	9 Months Ended
	Oct. 31, 2015
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business Overview	Note 1. 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 provide an enterprise data storage platform that transforms business through a dramatic increase in performance and reduction in complexity and costs. We are headquartered in Mountain View, California and have wholly owned subsidiaries throughout the world. Initial Public Offering In October 2015, we completed our initial public offering (“IPO”) of Class A common stock, in which we sold 28,750,000 shares. The shares were sold at an initial public offering price of $17.00 per share for net proceeds of $459.4 million, after deducting underwriting discounts and commissions of $29.3 million but before deducting offering costs of $4.5 million of which $2.7 million are expected to be paid by the end of our fiscal year ending on January 31, 2016. Upon the closing of our IPO, all outstanding shares of our convertible preferred stock automatically converted into 122,280,679 shares of Class B common stock. Following the IPO, we have two classes of authorized common stock – Class A common stock and Class B common stock.

Basis of Presentation and Summa

Basis of Presentation and Summary of Significant Accounting Policies	9 Months Ended
	Oct. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Summary of Significant Accounting Policies	Note 2. Basis of Presentation and Summary of Significant Accounting Policies Principles of Consolidation The condensed consolidated financial statements include the accounts of the company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Unaudited Interim Consolidated Financial Information The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our prospectus (the Prospectus) filed pursuant to Rule 424(b) under the Securities Exchange Act of 1933, as amended, with the SEC on October 7, 2015. The condensed consolidated balance sheet as of January 31, 2015, included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2016 or any future period. Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates. Such estimates include, but are not limited to, the determination of best estimate of selling price included in multiple-deliverable revenue arrangements, sales commissions, useful lives of intangible assets and property and equipment, fair values of stock-based awards, provision for income taxes, including related reserves, among others. Management bases its estimates on historical experience and on various other assumptions which are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities. Restricted Cash Restricted cash is comprised of certificates of deposit related to our leases. As of January 31, 2015 and October 31, 2015, we had restricted cash of $4.6 million and $7.1 million, which was included in other long-term assets in the condensed consolidated balance sheets. Deferred Commissions Deferred commissions consist of direct and incremental costs paid to our sales force related to customer contracts. The deferred commission amounts are recoverable through the revenue streams that will be recognized under the related customer contracts. Direct sales commissions are deferred when earned and amortized over the same period that revenue is recognized from the related customer contract. Amortization of deferred commissions is included in sales and marketing expense in the condensed consolidated statements of operations. As of January 31, 2015 and October 31, 2015, we recorded short-term deferred commissions of $9.4 million and $13.6 million, and long-term deferred commissions of $7.5 million and $11.8 million, in other long-term assets in the condensed consolidated balance sheets. During the three and nine months ended October 31, 2014 and October 31, 2015, we recognized sales commission expenses of $11.7 million, $21.8 million, $16.5 million and $38.6 million, respectively. Recent Accounting Pronouncement Not Yet Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 3. Fair Value Measurements 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 I —Observable inputs are unadjusted quoted prices in active markets for identical assets or liabilities; · Level II —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 III —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 money market funds within Level I because they are valued using quoted market prices. We classify our restricted cash within Level II because they are valued using 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. The following tables set forth the fair value of our financial assets measured at fair value on a recurring basis as of January 31, 2015 and October 31, 2015 using the above input categories (in thousands): January 31, 2015 Level I Level II Level III Total Financial Assets: Cash and cash equivalents: Money market funds $ 190,621 $ — $ — $ 190,621 Restricted cash: Certificates of deposit — 4,648 — 4,648 Total assets measured at fair value $ 190,621 $ 4,648 $ — $ 195,269 October 31, 2015 Level I Level II Level III Total Financial Assets: Cash and cash equivalents: Money market funds $ 45,614 $ — $ — $ 45,614 Restricted cash: Certificates of deposit — 7,132 — 7,132 Total assets measured at fair value $ 45,614 $ 7,132 $ — $ 52,746

Balance Sheet Components

Balance Sheet Components	9 Months Ended
	Oct. 31, 2015
Balance Sheet Components Disclosure [Abstract]
Balance Sheet Components	Note 4. Balance Sheet Components Property and Equipment, Net Property and equipment, net consists of the following (in thousands): January 31, October 31, 2015 2015 Test equipment $ 37,059 $ 58,359 Computer, equipment and software 19,022 25,158 Furniture and fixtures 2,460 2,587 Leasehold improvements 3,776 4,579 Total property and equipment 62,317 90,683 Less: accumulated depreciation and amortization (22,458 ) (43,566 ) Property and equipment, net $ 39,859 $ 47,117 Depreciation and amortization expense was $4.1 million and $8.5 million for the three months ended October 31, 2014 and October 31, 2015 and $9.2 million and $22.1 million for the nine months ended October 31, 2014 and October 31, 2015. Intangible Assets, Net Intangible assets, net consist of the following (in thousands): January 31, 2015 October 31, 2015 Technology patents $ 9,125 $ 9,125 Accumulated amortization (841 ) (1,819 ) Intangible assets, net $ 8,284 $ 7,306 Intangible assets amortization expense was $306,000 and $326,000 for the three months ended October 31, 2014 and October 31, 2015 and $515,000 and $978,000 for the nine months ended October 31, 2014 and October 31, 2015. Due to the defensive nature of these patents, the amortization is included in general and administrative expenses in the condensed consolidated statements of operations. As of October 31, 2015, expected amortization expense for intangible assets for each of the next five years and thereafter is as follows (in thousands): Year Ending January 31, Estimated Future Amortization Expense Remainder of 2016 $ 326 2017 1,304 2018 1,304 2019 1,304 2020 1,304 Thereafter 1,764 Total $ 7,306 Accrued Expenses and Other Liabilities Accrued expenses and other liabilities consist of the following (in thousands): January 31, October 31, 2015 2015 Sales and use tax payable $ 591 $ 583 Accrued professional fees 1,502 2,149 Accrued travel and entertainment expenses 1,138 1,264 Income tax payable 779 941 Other accrued liabilities 2,096 6,786 Accrued deferred offering costs — 2,717 Total accrued expenses and other liabilities $ 6,106 $ 14,440

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2015
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 5. Commitments and Contingencies Operating Leases In August 2015, we entered into certain lease agreements for office facilities with total lease obligations of approximately $19.7 million with lease periods expiring through 2023. In connection with these leases, we are required to maintain letters of credit of up to $3.3 million. Purchase Obligations In July 2015 and in November 2015, we entered into non-cancelable contracts of $1.1 million and $6.1 million, respectively, related to certain software services payable through 2018. Letters of Credit As of January 31, 2015 and October 31, 2015, we had outstanding letters of credit in the aggregate amount of $4.6 million and $7.1 million in connection with our facility leases. The letters of credit are collateralized by restricted cash in the same amount and mature at various dates through March 2023. Legal Matters On November 4, 2013, EMC Corporation, or EMC, filed a complaint against us, alleging that our hiring of EMC employees evidences a scheme to misappropriate EMC’s confidential information and trade secrets and to unlawfully interfere with EMC’s business relationships with its customers and contractual relationships with its employees. The complaint seeks damages and injunctive relief. On November 26, 2013, we answered and counterclaimed, denying EMC’s allegations and alleging that EMC surreptitiously obtained and tested our product in a manner that constituted misappropriation of our trade secrets, a breach of contract, breach of the covenant of good faith and fair dealing, unlawful interference with our contractual and business relationships as well as unfair competition and a violation of Massachusetts General Law 93A, Sections 2 and 11. On November 18, 2014, we amended our counterclaim, additionally alleging that EMC has engaged in commercial disparagement, violated the Lanham Act and engaged in defamation. Our counterclaim seeks damages and declaratory and injunctive relief. Fact discovery deadline has passed. Expert discovery is scheduled to conclude on March 18, 2016, and the deadline for filing dispositive motions is April 8, 2016. The district court has scheduled a trial date for October 17, 2016. On November 26, 2013, EMC filed a complaint against us, alleging infringement of five patents held by EMC. The complaint seeks damages and injunctive and equitable relief. On January 17, 2014, we filed a response to the complaint, denying all claims and asserting that EMC’s patents are invalid. Discovery has concluded. Trial is currently scheduled for March 7, 2016. We intend to defend these lawsuits vigorously. The outcome, including our liability, if any, with respect to this litigation, is uncertain. At present, we are unable to estimate a reasonably possible range of loss, if any, that may result from these matters. If an unfavorable outcome were to occur in this litigation, the impact could be material to our business, financial condition or results of operations. 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 may have a material adverse effect on our business, financial position, results of operations or cash flows. Accordingly we have not recorded any loss contingency on our condensed consolidated balance sheets as of January 31, 2015 and October 31, 2015.

Line of Credit

Line of Credit	9 Months Ended
	Oct. 31, 2015
Debt Disclosure [Abstract]
Line of Credit	Note 6. Line of Credit In August 2014, we entered into a two-year loan and security agreement with a financial institution to provide up to $15.0 million on a revolving line based on 80% of qualifying accounts receivable. Borrowings under this revolving line of credit bear interest at prime rate plus 1%. Interest expense is paid on a monthly basis based on the principle amount outstanding under the line of credit. The revolving line of credit matures in August 2016. Early termination is allowed but subject to a non-refundable termination fee of $150,000 if terminated on or after the first year from the effective date of the credit facility. Borrowings under this line of credit are collateralized by substantially all of our assets, excluding any intellectual property. We are also required to comply with certain financial covenants, including a minimum quarterly revenue target, delivery of financial and other information, as well as limitations on dispositions, mergers, or consolidations and other corporate activities. The terms of our outstanding loan and security agreements also restrict our ability to pay dividends. As of January 31, 2015 and October 31, 2015, we had no borrowings from this line of credit and we were in compliance with our financial covenants. In September 2015, we entered into a non-binding engagement letter with Silicon Valley Bank for an additional credit facility pursuant to which Silicon Valley Bank would serve as the lead arranger of a syndicate of banks. In November 2015, the non-binding engagement letter was terminated.

Convertible Preferred Stock

Convertible Preferred Stock	9 Months Ended
	Oct. 31, 2015
Temporary Equity [Abstract]
Convertible Preferred Stock	Note 7. Convertible Preferred Stock Upon the closing of our IPO in October 2015, all shares of our then-outstanding convertible preferred stock automatically converted on a one-to-one basis into an aggregate of 122,280,679 shares of Class B common stock.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Oct. 31, 2015
Equity [Abstract]
Stockholders’ Equity	Note 8. Stockholders’ Equity Preferred Stock Upon the closing of our IPO in October 2015, we filed an Amended and Restated Certificate of Incorporation, which authorized 20,000,000 shares of undesignated preferred stock, the rights, preferences and privileges of which may be designated from time to time by our board of directors. As of October 31, 2015, there were 20,000,000 shares of preferred stock authorized with a par value of $0.0001 per share, and no shares of preferred stock were issued or outstanding. Class A and Class B Common Stock We have two classes of authorized common stock, Class A common stock and Class B common stock. As of October 31, 2015, we had 2,000,000,000 shares of Class A common stock authorized with a par value of $0.0001 per share and 250,000,000 shares of Class B common stock authorized with a par value of $0.0001 per share. As of October 31, 2015, 28,750,000 shares of Class A common stock were issued and outstanding and 161,229,673 shares of Class B common stock were issued and outstanding. In August 2015, we established the Pure Good Foundation as a non-profit organization, and in September 2015 we issued 700,000 shares of our Class B common stock to this foundation. As a result, we incurred a one-time general and administrative expense of $11.9 million during the three months ended October 31, 2015, the amount of which was equal to the fair value of the shares of Class B common stock issued. We anticipate that the proposed programs of the Pure Good Foundation will include grants, humanitarian relief, volunteerism and social development projects. We believe that the Pure Good Foundation will foster employee morale, strengthen our community presence and provide increased brand visibility.

Equity Incentive Plans

Equity Incentive Plans	9 Months Ended
	Oct. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity Incentive Plans	Note 9. Equity Incentive Plans Equity Incentive Plans We maintain two equity incentive plans: the 2009 Equity Incentive Plan (our “2009 Plan”) and the 2015 Equity Incentive Plan (our “2015 Plan”). In August 2015, our board of directors adopted, and in September 2015 our stockholders approved, the 2015 Plan, which became effective in connection with our IPO in October 2015 and serves as the successor to our 2009 Plan. We have initially reserved 27,000,000 shares of our Class A common stock for issuance under our 2015 Plan. Our 2015 Plan provides for the issuance of incentive stock options to our employees and nonstatutory stock options, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance stock awards, performance cash awards, and other forms of stock awards to our employees, directors and consultants. No new awards will be 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, and until any restricted stock awards become vested or are forfeited. Our equity awards generally vest over a two to four year period and expire no later than ten years from the date of grant. As of October 31, 2015, 26,476,500 shares of our Class A common stock were reserved for future issuance under the 2015 Plan. 2015 Employee Stock Purchase Plan In August 2015, our board of directors adopted and our stockholders approved, the 2015 Employee Stock Purchase Plan (“2015 ESPP”), which became effective in connection with our IPO in October 2015. A total of 3,500,000 shares of Class A common stock was initially reserved for issuance under the 2015 ESPP. The 2015 ESPP allows eligible employees to purchase shares of our Class A common stock at a discount through payroll deductions (or other payroll contributions) 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). Except for the initial offering period, the 2015 ESPP provides for 24 month offering periods beginning March and September of each year, and each offering period will consist of four six-month purchase periods. The initial offering period began in October 2015, and will end on September 15, 2017. On each purchase date, eligible employees will purchase our Class A common stock at a price per share equal to 85% of the lesser of the fair market value of our Class A common stock (1) on the first trading day of the applicable offering period or (2) the purchase date. For the first offering period, the fair market value of our Class A common stock on the offering date was $17.00, the price at which our Class A common stock was first sold to the public in our IPO. As of October 31, 2015, 3,500,000 shares were reserved for future issuance under the 2015 ESPP. Stock Options A summary of activity under our equity incentive plans and related information is as follows: Options Outstanding Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life (In Years) Aggregate Intrinsic Value (In Thousands) Balance as of January 31, 2015 54,284,474 $ 3.02 8.3 $ 523,654 Options granted 18,159,824 15.77 Options exercised (1,784,066 ) 2.64 Options cancelled (1,730,681 ) 7.09 Balance as of October 31, 2015 68,929,551 6.29 Vested and exercisable as of October 31, 2015 21,903,812 1.71 6.8 $ 348,767 Vested and expected to vest as of October 31, 2015 66,851,238 6.22 8.1 $ 763,519 As of October 31, 2015, total unrecognized employee compensation cost, net of estimated forfeitures, was $210.7 million, which is expected to be recognized over a weighted-average period of 3.85 years. During the three and nine months ended October 31, 2014 and 2015, we granted options to purchase 90,000, 415,000 50,000 and 133,000 shares of common stock that vest upon satisfaction of a performance condition, respectively. For all the options that vest upon satisfaction of a performance condition, management determined it is probable that the performance condition will be satisfied and, accordingly, the related stock-based compensation expense of $407,000, $1.1 million, $797,000 and $1.8 million was recognized during the three and nine months ended October 31, 2014 and 2015, respectively. 2015 ESPP During the three months ended October 31, 2015, we recognized $907,000 of stock-based compensation expense related to the 2015 ESPP. As of October 31, 2015, there was $25.9 million of unrecognized stock-based compensation expense related to our 2015 ESPP that is expected to be recognized over the remaining term of the initial offering period. Determination of Fair Value The fair value of shares 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 expected term, the expected volatility of the common stock, a risk-free interest rate and expected dividend yield. We estimated the fair value of ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions: Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Expected term (in years) — 0.4 – 1.9 — 0.4 – 1.9 Expected volatility — 49 % — 49 % Risk-free interest rate — 0.1% - 0.7 % — 0.1% - 0.7 % Dividend rate — — — — The assumptions used in the Black-Scholes option pricing model were determined as follows. 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 contractual lives of the ESPP purchase rights. Expected Volatility —Since we do not have a substantive 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 consider to be comparable to our business over a period equivalent to the expected term of the 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 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. Non-Employee Stock Option Awards We granted non-employee stock options to purchase 22,500 shares of common stock during the three months ended October 31, 2015, and 7,500 and 22,500 shares of common stock during the nine months ended October 31, 2014 and 2015. No stock options were granted to non-employees during the three months ended October 31, 2014. We recognized stock-based compensation expense related to non-employee stock options of $483,000 and $93,000 for the three months ended October 31, 2014 and 2015 and $1.9 million and $975,000 for the nine months ended October 31, 2014 and 2015. Stock-Based Compensation Expense The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Cost of revenue—product $ 35 $ 43 $ 264 $ 139 Cost of revenue—support 159 657 1,057 1,511 Research and development 3,399 8,195 18,546 18,624 Sales and marketing 2,315 4,559 19,676 10,539 General and administrative 823 2,085 5,331 5,385 Total stock-based compensation expense $ 6,731 $ 15,539 $ 44,874 $ 36,198 The stock-based compensation expense for the nine months ended October 31, 2014 included $27.6 million related to the repurchase of common stock in excess of fair value in connection with a tender offer.

Net Loss per Share Attributable

Net Loss per Share Attributable to Common Stockholders	9 Months Ended
	Oct. 31, 2015
Earnings Per Share [Abstract]
Net Loss per Share Attributable to Common Stockholders	Note 10. 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. We consider all series of our convertible preferred stock to be participating securities. Under the two-class method, the net loss attributable to common stockholders is not allocated to the convertible preferred stock as the holders of our convertible preferred stock do not have a contractual obligation to share in our losses. Basic net loss per share attributable to common stockholders is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less shares subject to repurchase. The diluted net loss per share attributable to common stockholders is computed by giving effect to all potential dilutive common stock equivalents outstanding for the period. For purposes of this calculation, convertible preferred stock, stock options, restricted stock awards and early exercised stock options are considered to be common stock equivalents but have been excluded from the calculation of diluted net loss per share attributable to common stockholders as their effect is anti-dilutive. The rights, including the liquidation and dividend rights, of the holders of our Class A and Class B common stock are identical, except with respect to voting. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis and the resulting net loss per share attributed to common stockholders will, therefore, be the same for both Class A and Class B common stock on an individual or combined basis. We did not present dilutive net loss per share on an if-converted basis because the impact was not dilutive. The following table sets forth the computation of basic and diluted net loss per share attributable to common stockholders (in thousands, except per share data): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Net loss $ (40,397 ) $ (56,501 ) $ (135,596 ) $ (169,458 ) Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted 28,280 74,565 26,769 47,109 Net loss per share attributable to common stockholders, basic and diluted $ (1.43 ) $ (0.76 ) $ (5.07 ) $ (3.60 ) The following weighted-average outstanding shares of common stock equivalents were excluded from the computation of diluted net loss per share attributable to common stockholders for the periods presented because including them would have been anti-dilutive (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Convertible preferred stock (on an if-converted basis) 122,250 — 116,215 — Stock options to purchase common stock 50,433 63,738 49,589 59,611 Early exercised stock options and restricted stock awards 7,871 3,318 9,086 3,849 Total 180,554 67,056 174,890 63,460

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes Our provision for income taxes was primarily due to taxes on international operations and state income taxes. The difference between the provision for income taxes that would be derived by applying the statutory rate to our income (loss) before income taxes and the provision for income taxes recorded was primarily attributable to the difference in foreign tax rates and creation of the US tax attributes that were subject to a full valuation allowance. As of October 31, 2015, there were no material changes to either the nature or the amounts of the uncertain tax positions previously determined for the fiscal year ended January 31, 2015.

Segment Information

Segment Information	9 Months Ended
	Oct. 31, 2015
Segment Reporting [Abstract]
Segment Information	Note 12. Segment Information Our chief operating decision maker is a group which is comprised of our Chief Executive Officer, our Chief Financial Officer, and our President. 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. The following table sets forth revenue by geographic area based on the billing address of our customers (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 United States $ 39,574 $ 105,615 $ 84,844 $ 229,892 Rest of the world 9,615 25,749 23,757 60,210 Total revenue $ 49,189 $ 131,364 $ 108,601 $ 290,102 Long-lived assets by geographic area are summarized as follows (in thousands): January 31, October 31, 2015 2015 United States $ 39,069 $ 45,756 Rest of the world 790 1,361 Total long-lived assets $ 39,859 $ 47,117

Basis of Presentation and Sum18

Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2015
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include the accounts of the company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Unaudited Interim Consolidated Financial Information	Unaudited Interim Consolidated Financial Information The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“U.S. GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our prospectus (the Prospectus) filed pursuant to Rule 424(b) under the Securities Exchange Act of 1933, as amended, with the SEC on October 7, 2015. The condensed consolidated balance sheet as of January 31, 2015, included herein was derived from the audited financial statements as of that date, but does not include all disclosures including notes required by U.S. GAAP on an annual reporting basis. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2016 or any future period.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates. Such estimates include, but are not limited to, the determination of best estimate of selling price included in multiple-deliverable revenue arrangements, sales commissions, useful lives of intangible assets and property and equipment, fair values of stock-based awards, provision for income taxes, including related reserves, among others. Management bases its estimates on historical experience and on various other assumptions which are believed to be reasonable, the results of which form the basis for making judgments about the carrying values of assets and liabilities.
Restricted Cash	Restricted Cash Restricted cash is comprised of certificates of deposit related to our leases. As of January 31, 2015 and October 31, 2015, we had restricted cash of $4.6 million and $7.1 million, which was included in other long-term assets in the condensed consolidated balance sheets.
Deferred Commissions	Deferred Commissions Deferred commissions consist of direct and incremental costs paid to our sales force related to customer contracts. The deferred commission amounts are recoverable through the revenue streams that will be recognized under the related customer contracts. Direct sales commissions are deferred when earned and amortized over the same period that revenue is recognized from the related customer contract. Amortization of deferred commissions is included in sales and marketing expense in the condensed consolidated statements of operations. As of January 31, 2015 and October 31, 2015, we recorded short-term deferred commissions of $9.4 million and $13.6 million, and long-term deferred commissions of $7.5 million and $11.8 million, in other long-term assets in the condensed consolidated balance sheets. During the three and nine months ended October 31, 2014 and October 31, 2015, we recognized sales commission expenses of $11.7 million, $21.8 million, $16.5 million and $38.6 million, respectively.
Recent Accounting Pronouncement Not Yet Adopted	Recent Accounting Pronouncement Not Yet Adopted In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2014-09, Revenue from Contracts with Customers Revenue from Contracts with Customers

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The following tables set forth the fair value of our financial assets measured at fair value on a recurring basis as of January 31, 2015 and October 31, 2015 using the above input categories (in thousands): January 31, 2015 Level I Level II Level III Total Financial Assets: Cash and cash equivalents: Money market funds $ 190,621 $ — $ — $ 190,621 Restricted cash: Certificates of deposit — 4,648 — 4,648 Total assets measured at fair value $ 190,621 $ 4,648 $ — $ 195,269 October 31, 2015 Level I Level II Level III Total Financial Assets: Cash and cash equivalents: Money market funds $ 45,614 $ — $ — $ 45,614 Restricted cash: Certificates of deposit — 7,132 — 7,132 Total assets measured at fair value $ 45,614 $ 7,132 $ — $ 52,746

Balance Sheet Components (Table

Balance Sheet Components (Tables)	9 Months Ended
	Oct. 31, 2015
Balance Sheet Components Disclosure [Abstract]
Schedule of Property and Equipment, Net	Property and equipment, net consists of the following (in thousands): January 31, October 31, 2015 2015 Test equipment $ 37,059 $ 58,359 Computer, equipment and software 19,022 25,158 Furniture and fixtures 2,460 2,587 Leasehold improvements 3,776 4,579 Total property and equipment 62,317 90,683 Less: accumulated depreciation and amortization (22,458 ) (43,566 ) Property and equipment, net $ 39,859 $ 47,117
Schedule of Intangible Assets, Net	Intangible assets, net consist of the following (in thousands): January 31, 2015 October 31, 2015 Technology patents $ 9,125 $ 9,125 Accumulated amortization (841 ) (1,819 ) Intangible assets, net $ 8,284 $ 7,306
Schedule of Expected Amortization Expenses for Intangible Assets	As of October 31, 2015, expected amortization expense for intangible assets for each of the next five years and thereafter is as follows (in thousands): Year Ending January 31, Estimated Future Amortization Expense Remainder of 2016 $ 326 2017 1,304 2018 1,304 2019 1,304 2020 1,304 Thereafter 1,764 Total $ 7,306
Schedule of Accrued Expenses and Other Liabilities	Accrued expenses and other liabilities consist of the following (in thousands): January 31, October 31, 2015 2015 Sales and use tax payable $ 591 $ 583 Accrued professional fees 1,502 2,149 Accrued travel and entertainment expenses 1,138 1,264 Income tax payable 779 941 Other accrued liabilities 2,096 6,786 Accrued deferred offering costs — 2,717 Total accrued expenses and other liabilities $ 6,106 $ 14,440

Equity Incentive Plans (Tables)

Equity Incentive Plans (Tables)	9 Months Ended
	Oct. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Summary of Stock Option Activity Under Equity Incentive Plans and Related Information	A summary of activity under our equity incentive plans and related information is as follows: Options Outstanding Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Life (In Years) Aggregate Intrinsic Value (In Thousands) Balance as of January 31, 2015 54,284,474 $ 3.02 8.3 $ 523,654 Options granted 18,159,824 15.77 Options exercised (1,784,066 ) 2.64 Options cancelled (1,730,681 ) 7.09 Balance as of October 31, 2015 68,929,551 6.29 Vested and exercisable as of October 31, 2015 21,903,812 1.71 6.8 $ 348,767 Vested and expected to vest as of October 31, 2015 66,851,238 6.22 8.1 $ 763,519
Summary of Estimated Fair Value of Employee Purchase Plan	We estimated the fair value of ESPP purchase rights using a Black-Scholes option pricing model with the following assumptions: Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Expected term (in years) — 0.4 – 1.9 — 0.4 – 1.9 Expected volatility — 49 % — 49 % Risk-free interest rate — 0.1% - 0.7 % — 0.1% - 0.7 % Dividend rate — — — —
Summarizes the Components of Stock-Based Compensation	The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Cost of revenue—product $ 35 $ 43 $ 264 $ 139 Cost of revenue—support 159 657 1,057 1,511 Research and development 3,399 8,195 18,546 18,624 Sales and marketing 2,315 4,559 19,676 10,539 General and administrative 823 2,085 5,331 5,385 Total stock-based compensation expense $ 6,731 $ 15,539 $ 44,874 $ 36,198

Net Loss per Share Attributab22

Net Loss per Share Attributable to Common Stockholders (Tables)	9 Months Ended
	Oct. 31, 2015
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): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Net loss $ (40,397 ) $ (56,501 ) $ (135,596 ) $ (169,458 ) Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted 28,280 74,565 26,769 47,109 Net loss per share attributable to common stockholders, basic and diluted $ (1.43 ) $ (0.76 ) $ (5.07 ) $ (3.60 )
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): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 Convertible preferred stock (on an if-converted basis) 122,250 — 116,215 — Stock options to purchase common stock 50,433 63,738 49,589 59,611 Early exercised stock options and restricted stock awards 7,871 3,318 9,086 3,849 Total 180,554 67,056 174,890 63,460

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Oct. 31, 2015
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Area	The following table sets forth revenue by geographic area based on the billing address of our customers (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2014 2015 2014 2015 United States $ 39,574 $ 105,615 $ 84,844 $ 229,892 Rest of the world 9,615 25,749 23,757 60,210 Total revenue $ 49,189 $ 131,364 $ 108,601 $ 290,102
Schedule of Long-Lived Assets by Geographic Area	Long-lived assets by geographic area are summarized as follows (in thousands): January 31, October 31, 2015 2015 United States $ 39,069 $ 45,756 Rest of the world 790 1,361 Total long-lived assets $ 39,859 $ 47,117

Business Overview - Additional

Business Overview - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2016
Organization And Description Of Business [Line Items]
Net proceeds from initial public offering		$ 459,425	$ 0
Conversion of preferred stock	122,280,679	122,280,679
IPO
Organization And Description Of Business [Line Items]
Net proceeds from initial public offering	$ 459,400
Underwriting discounts and commissions	29,300
Offering costs incurred	$ 4,500
Accrued offering costs				$ 2,700
IPO | Class A Common Stock
Organization And Description Of Business [Line Items]
Shares issued	28,750,000
Issue price per share	$ 17	$ 17
IPO | Class B Common Stock
Organization And Description Of Business [Line Items]
Conversion of preferred stock	122,280,679	122,280,679

Basis of Presentation and Sum25

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Accounting Policies [Abstract]
Restricted cash	$ 7,100		$ 7,100		$ 4,600
Deferred commissions, current	13,612		13,612		9,431
Deferred income taxes, non-current	11,800		11,800		$ 7,500
Sales commission expenses	$ 16,500	$ 11,700	$ 38,600	$ 21,800

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value of Assets Measured at Fair Value on Recurring Basis (Details) - Fair Value Measurements Recurring - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets measured at fair value	$ 52,746	$ 195,269
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets measured at fair value	45,614	190,621
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Total assets measured at fair value	7,132	4,648
Money Market Funds
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalent	45,614	190,621
Money Market Funds | Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and cash equivalent	45,614	190,621
Certificates of Deposit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Restricted cash	7,132	4,648
Certificates of Deposit | Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Restricted cash	$ 7,132	$ 4,648

Balance Sheet Components - Sche

Balance Sheet Components - Schedule of Property and Equipment, Net (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 90,683	$ 62,317
Less: accumulated depreciation and amortization	(43,566)	(22,458)
Property and equipment, net	47,117	39,859
Test Equipment
Property Plant And Equipment [Line Items]
Total property and equipment, gross	58,359	37,059
Computer Equipment and Software
Property Plant And Equipment [Line Items]
Total property and equipment, gross	25,158	19,022
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Total property and equipment, gross	2,587	2,460
Leasehold Improvements
Property Plant And Equipment [Line Items]
Total property and equipment, gross	$ 4,579	$ 3,776

Balance Sheet Components - Addi

Balance Sheet Components - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Balance Sheet Components Disclosure [Abstract]
Depreciation and amortization	$ 8,500,000	$ 4,100,000	$ 22,100,000	$ 9,200,000
Intangible assets amortization expense	$ 326,000	$ 306,000	$ 978,000	$ 515,000

Balance Sheet Components - Sc29

Balance Sheet Components - Schedule of Intangible Assets, Net (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Finite Lived Intangible Assets [Line Items]
Intangible assets, net	$ 7,306	$ 8,284
Technology Patents
Finite Lived Intangible Assets [Line Items]
Technology patents	9,125	9,125
Accumulated amortization	(1,819)	(841)
Intangible assets, net	$ 7,306	$ 8,284

Balance Sheet Components - Sc30

Balance Sheet Components - Schedule of Expected Amortization Expenses for Intangible Assets (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Intangible Assets Net Disclosure [Abstract]
Remainder of 2016	$ 326
2,017	1,304
2,018	1,304
2,019	1,304
2,020	1,304
Thereafter	1,764
Intangible assets, net	$ 7,306	$ 8,284

Balance Sheet Components - Sc31

Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Payables And Accruals [Abstract]
Sales and use tax payable	$ 583	$ 591
Accrued professional fees	2,149	1,502
Accrued travel and entertainment expenses	1,264	1,138
Income tax payable	941	779
Other accrued liabilities	6,786	2,096
Accrued deferred offering costs	2,717	0
Total accrued expenses and other liabilities	$ 14,440	$ 6,106

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Aug. 31, 2015	Oct. 31, 2015	Nov. 30, 2015	Jul. 31, 2015	Jan. 31, 2015
Commitments And Contingencies [Line Items]
Lease obligations	$ 19,700,000
Lease expiration period	2,023
Outstanding letters of credit	$ 3,300,000	$ 7,100,000			$ 4,600,000
Non-cancelable purchase obligation related to software services				$ 1,100,000
Letter of credit maturity year and month		2023-03
Loss contingency		$ 0			$ 0
Subsequent Event
Commitments And Contingencies [Line Items]
Non-cancelable purchase obligation related to software services			$ 6,100,000

Line of Credit - Additional Inf

Line of Credit - Additional Information (Details) - USD ($)	1 Months Ended
	Aug. 31, 2014	Oct. 31, 2015	Jan. 31, 2015
Debt Instrument [Line Items]
Line of credit		$ 0	$ 0
Revolving Line of Credit
Debt Instrument [Line Items]
Line of credit facility, term	2 years
Line of credit facility, maximum borrowing capacity	$ 15,000,000
Percentage of accounts receivable qualifying for revolving credit agreement	80.00%
Line of credit facility expiration month and year	2016-08
Line of credit facility, termination fee on or after first year	$ 150,000
Revolving Line of Credit | Prime Rate
Debt Instrument [Line Items]
Line of credit facility, interest rate	1.00%

Convertible Preferred Stock - A

Convertible Preferred Stock - Additional Information (Details)	Oct. 31, 2015shares
Class Of Stock Disclosures [Abstract]
Conversion of preferred stock	122,280,679

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Oct. 31, 2015	Sep. 30, 2015	Jan. 31, 2015
Class Of Stock [Line Items]
Preferred stock, shares authorized	20,000,000		0
Preferred stock, par value	$ 0.0001		$ 0.0001
Preferred stock, shares issued	0		0
Preferred stock, shares outstanding	0		0
Common stock, shares authorized	2,250,000,000		230,812,000
Common stock, shares issued	189,980,000		36,465,000
Common stock, shares outstanding	189,980,000		36,465,000
Class A Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized	2,000,000,000		1,000
Common stock, par value per share	$ 0.0001		$ 0.0001
Common stock, shares issued	28,750,000
Common stock, shares outstanding	28,750,000
Class B Common Stock
Class Of Stock [Line Items]
Common stock, shares authorized	250,000,000		230,811,000
Common stock, par value per share	$ 0.0001		$ 0.0001
Common stock, shares issued	161,229,673		36,465,000
Common stock, shares outstanding	161,229,673		36,465,000
Class B Common Stock | Pure Good Foundation
Class Of Stock [Line Items]
Common stock, shares issued		700,000
Non cash general and administrative expense	$ 11.9

Equity Incentive Plans - Additi

Equity Incentive Plans - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2015USD ($)shares	Oct. 31, 2015USD ($)shares	Oct. 31, 2014USD ($)shares	Oct. 31, 2015USD ($)Planshares	Oct. 31, 2014USD ($)shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of equity incentive plans | Plan				2
Unrecognized compensation cost		$ 210,700,000		$ 210,700,000
Unrecognized compensation cost related to stock awards, weighted-average period				3 years 10 months 6 days
Options Outstanding, Number of Shares, Options granted | shares				18,159,824
Stock-based compensation expense		$ 15,539,000	$ 6,731,000	$ 36,198,000	$ 44,874,000
Repurchase Of Common Stock
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense					$ 27,600,000
Performance Condition
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options Outstanding, Number of Shares, Options granted | shares		50,000	90,000	133,000	415,000
Stock-based compensation expense		$ 797,000	$ 407,000	$ 1,800,000	$ 1,100,000
Non Employee Stock Option
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options Outstanding, Number of Shares, Options granted | shares		22,500	0	22,500	7,500
Stock-based compensation expense		$ 93,000	$ 483,000	$ 975,000	$ 1,900,000
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 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance | shares	3,500,000
Employee Stock Purchase Plan Offering Period	24 months
Fair market value of Class A common stock	$ 17
ESPP
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense		907,000
Unrecognized stock-based compensation expense		$ 25,900,000		$ 25,900,000
Class A Common Stock | 2015 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares initially reserved for issuance | shares		27,000,000		27,000,000
Shares reserved for future issuance | shares		26,476,500		26,476,500
Class A Common Stock | 2015 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved for future issuance | shares	3,500,000
Payroll deductions percentage	30.00%
Share cap for ESPP at purchase date | shares	3,000
Calendar year gap for ESPP contribution amount	$ 25,000
ESPP offering price as percentage of fair market value	85.00%

Equity Incentive Plans - Summar

Equity Incentive Plans - Summary of Activity Under the Equity Incentive Plans (Details) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Oct. 31, 2015USD ($)$ / sharesshares	Jan. 31, 2015USD ($)$ / sharesshares
Options Outstanding, Number of Shares
Options Outstanding, Number of Shares, Beginning Balance | shares	54,284,474
Options Outstanding, Number of Shares, Options granted | shares	18,159,824
Options Outstanding, Number of Shares, Options exercised | shares	(1,784,066)
Options Outstanding, Number of Shares, Options cancelled | shares	(1,730,681)
Options Outstanding, Number of Shares, Ending Balance | shares	68,929,551	54,284,474
Options Outstanding, Number of Shares, Vested and exercisable | shares	21,903,812
Options Outstanding, Number of Shares, Vested and expected to vest | shares	66,851,238
Options Outstanding, Weighted Average Exercise Price
Weighted Average Exercise Price, Beginning Balance | $ / shares	$ 3.02
Weighted Average Exercise Price, Options granted | $ / shares	15.77
Weighted Average Exercise Price, Options exercised | $ / shares	2.64
Weighted Average Exercise Price, Options Cancelled | $ / shares	7.09
Weighted Average Exercise Price, Ending Balance | $ / shares	6.29	$ 3.02
Weighted Average Exercise Price, Vested and exercisable | $ / shares	1.71
Weighted Average Exercise Price, Vested and expected to vest | $ / shares	$ 6.22
Options Outstanding, Weighted Average Remaining Contractual Life (In Years)
Weighted Average Remaining Contractual Life (In Years)	0 years	8 years 3 months 18 days
Weighted Average Remaining Contractual Life (In Years), Vested and exercisable	6 years 9 months 18 days
Weighted Average Remaining Contractual Life (In Years), Vested and expected to vest	8 years 1 month 6 days
Options Outstanding, Aggregate Intrinsic Value
Aggregate Intrinsic Value, Beginning Balance | $	$ 523,654
Aggregate Intrinsic Value, Ending Balance | $	0	$ 523,654
Aggregate Intrinsic Value, Vested and exercisable | $	348,767
Aggregate Intrinsic Value, Vested and expected to vest | $	$ 763,519

Equity Incentive Plans - Summ38

Equity Incentive Plans - Summary of Estimated Fair Value of Employee Stock Options (Details) - Employee Stock Purchase Plan	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)		0 years		0 years
Expected volatility	49.00%	0.00%	49.00%	0.00%
Risk-free interest rate		0.00%		0.00%
Risk-free interest rate, Minimum	0.10%		0.10%
Risk-free interest rate, Maximum	0.70%		0.70%
Dividend rate	0.00%	0.00%	0.00%	0.00%
Minimum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	4 months 24 days		4 months 24 days
Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (in years)	1 year 10 months 24 days		1 year 10 months 24 days

Equity Incentive Plans - Summ39

Equity Incentive Plans - Summary of Stock-Based Compensation Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 15,539	$ 6,731	$ 36,198	$ 44,874
Cost of Revenue Product
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	43	35	139	264
Cost of Revenue Support
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	657	159	1,511	1,057
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	8,195	3,399	18,624	18,546
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	4,559	2,315	10,539	19,676
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 2,085	$ 823	$ 5,385	$ 5,331

Net Loss per Share Attributab40

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	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Earnings Per Share [Abstract]
Net loss	$ (56,501)	$ (40,397)	$ (169,458)	$ (135,596)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted	74,565	28,280	47,109	26,769
Net loss per share attributable to common stockholders, basic and diluted	$ (0.76)	$ (1.43)	$ (3.60)	$ (5.07)

Net Loss per Share Attributab41

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	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount	67,056	180,554	63,460	174,890
Convertible preferred stock (on an if-converted basis)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount	0	122,250	0	116,215
Stock options to purchase common stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount	63,738	50,433	59,611	49,589
Early exercised stock options and restricted stock awards
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from computation of earnings per share, amount	3,318	7,871	3,849	9,086

Segment Information - Additiona

Segment Information - Additional Information (Details)	9 Months Ended
	Oct. 31, 2015Segment
Segment Reporting [Abstract]
Number of business activity	1
Number of reportable segments	1

Segment Information - Schedule

Segment Information - Schedule of Revenue by Geographic Area (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 131,364	$ 49,189	$ 290,102	$ 108,601
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	105,615	39,574	229,892	84,844
Rest of the world
Revenues From External Customers And Long Lived Assets [Line Items]
Total revenue	$ 25,749	$ 9,615	$ 60,210	$ 23,757

Segment Information - Schedul44

Segment Information - Schedule of Long-Lived Assets by Geographic Area (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	$ 47,117	$ 39,859
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	45,756	39,069
Rest of the world
Revenues From External Customers And Long Lived Assets [Line Items]
Property and equipment, net	$ 1,361	$ 790