PURE STORAGE, INC., 10-Q filed on 9/6/2016
Quarterly Report
Document and Entity Information
6 Months Ended
Jul. 31, 2016
Aug. 25, 2016
Class A Common Stock
Aug. 25, 2016
Class B Common Stock
Document Type
10-Q 
 
 
Amendment Flag
false 
 
 
Document Period End Date
Jul. 31, 2016 
 
 
Document Fiscal Year Focus
2016 
 
 
Document Fiscal Period Focus
Q2 
 
 
Trading Symbol
PSTG 
 
 
Entity Registrant Name
Pure Storage, Inc. 
 
 
Entity Central Index Key
0001474432 
 
 
Current Fiscal Year End Date
--01-31 
 
 
Entity Filer Category
Non-accelerated Filer 
 
 
Entity Common Stock, Shares Outstanding
 
72,026,868 
124,581,816 
Condensed Consolidated Balance Sheets (USD $)
Jul. 31, 2016
Jan. 31, 2016
Current assets:
 
 
Cash and cash equivalents
$ 205,818,000 
$ 604,742,000 
Marketable securities
364,356,000 
0 
Accounts receivable, net of allowance of $944 and $2,146 as of January 31, 2016 and July 31, 2016
118,532,000 
126,324,000 
Inventory
22,630,000 
20,649,000 
Deferred commissions, current
14,000,000 
15,700,000 
Prepaid expenses and other current assets
20,933,000 
20,652,000 
Total current assets
746,292,000 
788,070,000 
Property and equipment, net
78,523,000 
52,629,000 
Intangible assets, net
7,312,000 
6,980,000 
Deferred income taxes, non-current
815,000 
536,000 
Other assets, non-current
29,262,000 
22,568,000 
Total assets
862,204,000 
870,783,000 
Current liabilities:
 
 
Accounts payable
30,526,000 
38,187,000 
Accrued compensation and benefits
33,369,000 
32,995,000 
Accrued expenses and other liabilities
20,464,000 
14,076,000 
Deferred revenue, current
127,430,000 
94,514,000 
Liability related to early exercised stock options
4,274,000 
4,760,000 
Total current liabilities
216,063,000 
184,532,000 
Deferred revenue, non-current
129,876,000 
121,690,000 
Other liabilities, non-current
2,209,000 
1,207,000 
Total liabilities
348,148,000 
307,429,000 
Commitments and contingencies
0 
0 
Stockholders’ equity:
 
 
Preferred stock, par value of $0.0001 per share— 20,000 shares authorized as of January 31, 2016 and July 31, 2016; no shares issued and outstanding as of January 31, 2016 and July 31, 2016
0 
0 
Class A and Class B common stock, par value of $0.0001 per share— 2,250,000 (Class A 2,000,000, Class B 250,000) shares authorized as of January 31, 2016 and July 31, 2016; 190,509 (Class A 28,769, Class B 161,740) and 196,466 (Class A 71,516, Class B 124,950) shares issued and outstanding as of January 31, 2016 and July 31, 2016
20,000 
19,000 
Additional paid-in capital
1,193,936,000 
1,118,670,000 
Accumulated other comprehensive income
852,000 
0 
Accumulated deficit
(680,752,000)
(555,335,000)
Total stockholders’ equity
514,056,000 
563,354,000 
Total liabilities and stockholders’ equity
$ 862,204,000 
$ 870,783,000 
Condensed Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Accounts receivable, allowance
$ 2,146 
$ 944 
Preferred stock, par value (in dollars per share)
$ 0.0001 
$ 0.0001 
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 
Common stock, par value per share (in dollars per share)
$ 0.0001 
$ 0.0001 
Common stock, shares authorized (in shares)
2,250,000,000 
2,250,000,000 
Common stock, shares issued (in shares)
196,466,000 
190,509,000 
Common stock, shares outstanding (in shares)
196,466,000 
190,509,000 
Class A Common Stock
 
 
Common stock, par value per share (in dollars per share)
$ 0.0001 
$ 0.0001 
Common stock, shares authorized (in shares)
2,000,000,000 
2,000,000,000 
Common stock, shares issued (in shares)
71,517,000 
28,769,000 
Common stock, shares outstanding (in shares)
71,517,000 
28,769,000 
Class B Common Stock
 
 
Common stock, par value per share (in dollars per share)
$ 0.0001 
$ 0.0001 
Common stock, shares authorized (in shares)
250,000,000 
250,000,000 
Common stock, shares issued (in shares)
124,949,816 
161,740,000 
Common stock, shares outstanding (in shares)
124,950,000 
161,740,000 
Condensed Consolidated Statements of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Revenue:
 
 
 
 
Product
$ 130,920 
$ 71,192 
$ 242,658 
$ 134,810 
Support
32,294 
13,469 
60,503 
23,928 
Total revenue
163,214 
84,661 
303,161 
158,738 
Cost of revenue:
 
 
 
 
Product
42,847 
27,641 
76,893 
50,353 
Support
14,000 
7,497 
26,934 
14,421 
Total cost of revenue
56,847 
35,138 
103,827 
64,774 
Gross profit
106,367 
49,523 
199,334 
93,964 
Operating expenses:
 
 
 
 
Research and development
58,635 
38,188 
111,573 
69,870 
Sales and marketing
87,583 
59,517 
170,681 
107,844 
General and administrative
19,630 
15,227 
41,211 
27,919 
Total operating expenses
165,848 
112,932 
323,465 
205,633 
Loss from operations
(59,481)
(63,409)
(124,131)
(111,669)
Other income (expense), net
37 
(371)
1,319 
(1,074)
Loss before provision for income taxes
(59,444)
(63,780)
(122,812)
(112,743)
Provision for income taxes
106 
57 
526 
214 
Net loss
$ (59,550)
$ (63,837)
$ (123,338)
$ (112,957)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
$ (0.31)
$ (1.89)
$ (0.65)
$ (3.41)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)
192,730 
33,688 
191,026 
33,154 
Condensed Consolidated Statements of Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Statement of Comprehensive Income [Abstract]
 
 
 
 
Net loss
$ (59,550)
$ (63,837)
$ (123,338)
$ (112,957)
Other comprehensive income, net of tax effect:
 
 
 
 
Change in unrealized net gain on available-for-sale securities
45 
0 
852 
0 
Comprehensive loss
$ (59,505)
$ (63,837)
$ (122,486)
$ (112,957)
Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
 
 
Net loss
$ (123,338)
$ (112,957)
Adjustments to reconcile net loss to net cash used in operating activities:
 
 
Depreciation and amortization
22,336 
14,268 
Stock-based compensation expense
50,894 
20,659 
Other
494 
0 
Changes in operating assets and liabilities:
 
 
Accounts receivable, net
6,589 
(21,017)
Inventory
(2,392)
(1,653)
Deferred commissions
1,887 
(4,865)
Prepaid expenses and other assets
(809)
(2,634)
Accounts payable
(10,007)
2,417 
Accrued compensation and other liabilities
8,687 
11,479 
Deferred revenue
41,102 
49,813 
Net cash used in operating activities
(4,557)
(44,490)
CASH FLOWS FROM INVESTING ACTIVITIES
 
 
Purchases of property and equipment
(46,118)
(21,823)
Purchase of intangible assets
(1,000)
0 
Purchases of marketable securities
(427,968)
0 
Sales of marketable securities
59,071 
0 
Maturities of marketable securities
5,800 
0 
Net increase in restricted cash
(5,600)
0 
Net cash used in investing activities
(415,815)
(21,823)
CASH FLOWS FROM FINANCING ACTIVITIES
 
 
Net proceeds from exercise of stock options
6,369 
3,004 
Proceeds from issuance of common stock under employee stock purchase plan
15,079 
0 
Payments of deferred offering costs
0 
(1,116)
Net cash provided by financing activities
21,448 
1,888 
Net decrease in cash and cash equivalents
(398,924)
(64,425)
Cash and cash equivalents, beginning of period
604,742 
192,707 
Cash and cash equivalents, end of period
205,818 
128,282 
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
 
 
Cash paid for income taxes
1,827 
333 
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION
 
 
Property and equipment purchased but not yet paid
7,691 
1,742 
Vesting of early exercised stock options
486 
1,096 
Unpaid deferred offering costs
$ 0 
$ 1,373 
Business Overview
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 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.
Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation and Summary of Significant Accounting Policies
Basis of Presentation and Summary of Significant Accounting Policies
Principles of Consolidation
The condensed consolidated financial statements include the accounts of the company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Unaudited Interim Consolidated Financial Information
The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended January 31, 2016.
In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2017 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-element 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 and contingent liabilities, 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 cash collateral for a vendor credit card program and letters of credit related to our leases. As of January 31, 2016 and July 31, 2016, we had restricted cash of $7.1 million and $12.7 million, which was included in other assets, non-current, in the condensed consolidated balance sheets.
Marketable Securities
We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses, net of tax, in other comprehensive income (loss), which is reflected as a component of stockholders’ equity. We determine any realized gains or losses on the sale of marketable securities on a specific identification method. In addition, we evaluate our securities to assess whether those with unrealized loss positions are other than temporarily impaired. Realized gains and losses and declines in value deemed to be other than temporary are reported in other income (expense), net, in the condensed consolidated statements of operations.
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, 2016 and July 31, 2016, we recorded deferred commissions, current, of $15.7 million and $14.0 million, and deferred commissions, non-current, of $14.3 million and $14.1 million, in other assets, non-current, in the condensed consolidated balance sheets. We recognized sales commission expenses of $9.7 million and $19.6 million during the three months ended July 31, 2015 and 2016 and $18.6 million and $37.2 million during the six months ended July 31, 2015 and 2016.
Recently Adopted Accounting Standard
In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). We elected to early adopt this standard in the second quarter of fiscal 2017 with February 1, 2016 being the effective date of adoption. Under ASU 2016-09, excess tax benefits and deficiencies are recognized prospectively in our provision for income taxes rather than additional paid-in capital. As a result of the adoption, our provision for income taxes decreased by $535,000 during the three months ended April 30, 2016. Additionally, we have elected to account for forfeitures as they occur rather than estimate expected forfeiture using a modified retrospective transition method. Accordingly, we recorded a cumulative-effect adjustment of $2.1 million to accumulated deficit and an increase of stock-based compensation expense of $864,000 during the three months ended April 30, 2016. The impact to our provision for income taxes and stock-based compensation expense of $535,000 and $864,000 in the quarter ended April 30, 2016 were reflected in our net loss for the six months ended July 31, 2016. Finally, ASU 2016-09 requires excess tax benefits to be presented as a component of operating cash flows rather than financing cash flows. We elected to adopt this requirement prospectively and accordingly, prior periods have not been adjusted. Excess tax benefits were not material for all periods presented.
Recent Accounting Pronouncements Not Yet Adopted
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), requiring an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 will supersede nearly all existing revenue recognition guidance under U.S. GAAP when it becomes effective. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers, deferring the effective date for ASU 2014-09 by one year, and thus, the new standard will be effective for us beginning on February 1, 2018 with early adoption permitted on or after February 1, 2017. This standard may be adopted using either the full or modified retrospective methods. We are currently evaluating adoption methods and the impact of this standard on our consolidated financial statements.
In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize all leases with terms in excess of one year on their balance sheet as a right-of-use asset and a lease liability at the commencement date. The new standard also simplifies the accounting for sale and leaseback transactions. The amendments in this update are effective for us beginning on February 1, 2019 and must be adopted using a modified retrospective method for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. Early adoption is permitted. We are currently evaluating adoption methods and the impact of this standard on our consolidated financial statements.
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 are effective for us beginning on February 1, 2020 with early adoption permitted on or after February 1, 2019. We are currently evaluating the impact of this standard on our consolidated financial statements.
Financial Instruments
Financial Instruments
Financial Instruments  
Fair Value Measurements
We measure our cash equivalents, marketable securities and restricted cash at fair value on a recurring basis. We define fair value as the exchange price that would be received from sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We measure our financial assets and liabilities at fair value at each reporting period using a fair value hierarchy which requires us to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. A financial instrument’s classification within the fair value hierarchy is based upon the lowest level of input that is significant to the fair value measurement. Three levels of inputs may be used to measure fair value:

▪
Level 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 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, quoted market prices for similar instruments, or pricing models such as discounted cash flow techniques.
Cash Equivalents, Marketable Securities and Restricted Cash
The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories as of January 31, 2016 and July 31, 2016 (in thousands):
 
 
As of January 31, 2016
 
Amortized
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Fair
Value
 
Cash Equivalents
 
Restricted Cash
Level 1
 

 
 

 
 

 
 

 
 

 
 

Money market funds
$
45,614

 
$
—

 
$
—

 
$
45,614

 
$
45,614

 
$
—

Level 2
 
 
 
 
 
 
 
 
 
 
 
Certificate of deposits
7,132

 
—

 
—

 
7,132

 
—

 
7,132

Total
$
52,746

 
$
—

 
$
—

 
$
52,746

 
$
45,614

 
$
7,132


 
As of July 31, 2016
 
Amortized
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Fair
Value
 
Cash Equivalents
 
Marketable
Securities
 
Restricted Cash
Level 1
 
 
 
 
 
 
 
 
 
 
 
 
 
Money market accounts
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
12,732

Level 2
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. government treasury notes
135,581

 
181

 
(3
)
 
135,759

 
18,546

 
117,213

 
—

U.S. government agencies
47,655

 
41

 
(6
)
 
47,690

 
4,001

 
43,689

 
—

Corporate debt securities
200,093

 
1,146

 
(15
)
 
201,224

 
401

 
200,823

 
—

Foreign government bonds
2,624

 
7

 
—

 
2,631

 
—

 
2,631

 
—

Total
$
385,953

 
$
1,375

 
$
(24
)
 
$
387,304

 
$
22,948

 
$
364,356

 
$
12,732


 
The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):
 
 
As of July 31, 2016
 
Amortized Cost
 
Fair Value
Due within one year
$
78,421

 
$
78,470

Due in one to five years
284,585

 
285,886

Total
$
363,006

 
$
364,356


 
As of July 31, 2016, there were no securities that were in an unrealized loss position for more than 12 months. Based on our evaluation of available evidence, we concluded that the gross unrealized losses on our marketable securities as of July 31, 2016 were temporary in nature. The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position for less than 12 months as of July 31, 2016, aggregated by investment category (in thousands):
 
 
Less than 12 months
 
Fair
Value
 
Unrealized
Loss
U.S. government notes
$
2,002

 
$
(3
)
U.S. government agencies
6,492

 
(6
)
Corporate debt securities
13,689

 
(15
)
Total
$
22,183

 
$
(24
)

 
Gross realized gains on sale of marketable securities for the three and six months ended July 31, 2016 were $104,000 and $110,000, respectively. We reflect these gains as a component of other income (expense), net in the accompanying condensed consolidated statements of operations.
Balance Sheet Components
Balance Sheet Components
Balance Sheet Components
Property and Equipment, Net
Property and equipment, net, consists of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Test equipment
$
65,663

 
$
94,914

Computer, equipment and software
31,388

 
45,340

Furniture and fixtures
2,852

 
4,028

Leasehold improvements
4,935

 
7,839

Total property and equipment
104,838

 
152,121

Less: accumulated depreciation and amortization
(52,209
)
 
(73,598
)
Property and equipment, net
$
52,629

 
$
78,523


 
Depreciation and amortization expense was $7.2 million and $11.6 million for the three months ended July 31, 2015 and 2016 and $13.4 million and $21.7 million for the six months ended July 31, 2015 and 2016, respectively.
Intangible Assets, Net
Intangible assets, net, consist of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Technology patents
$
9,125

 
$
10,125

Accumulated amortization
(2,145
)
 
(2,813
)
Intangible assets, net
$
6,980

 
$
7,312


 
During the three months ended July 31, 2016, we acquired a portfolio of technology patents for $1.0 million with an estimated weighted average useful life of 5 years. Intangible assets amortization expense was $326,000 and $342,000 for the three months ended July 31, 2015 and 2016 and $652,000 and $668,000 for the six months ended July 31, 2015 and 2016.  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 July 31, 2016, expected amortization expense for intangible assets for each of the next five years and thereafter is as follows (in thousands):
 
Fiscal Years Ending January 31,
Estimated 
Future
Amortization
Expense
Remainder of 2017
$
752

2018
1,504

2019
1,504

2020
1,504

2021
1,504

Thereafter
544

Total
$
7,312


Accrued Expenses and Other Liabilities
Accrued expenses and other liabilities consist of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Sales and use tax payable
$
299

 
$
150

Accrued professional fees
3,044

 
3,214

Accrued marketing
2,684

 
6,237

Accrued travel and entertainment expenses
2,182

 
3,223

Income tax payable
1,791

 
1,285

Other accrued liabilities
4,076

 
6,355

Total accrued expenses and other liabilities
$
14,076

 
$
20,464

Commitments and Contingencies
Commitments and Contingencies
Commitments and Contingencies

Operating Leases
 
During the six months ended July 31, 2016, we entered into three office facility lease agreements and an amendment to an existing office facility lease agreement with total additional lease obligations of approximately $39.5 million with lease periods expiring through June 2024.
Letters of Credit
As of January 31, 2016 and July 31, 2016, we had outstanding letters of credit in the aggregate amount of $7.1 million and $7.7 million respectively, 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 June 2024.
Legal Matters
On November 4, 2013, EMC filed a complaint against us in the U.S. District Court for the District of Massachusetts, 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 and expert discovery has closed. Dispositive motions were filed in May 2016. In August 2016, we received summary judgment on EMC’s claims under Massachusetts General Law 93A, and the remainder of our dispositive motions were denied pending resolution at trial. EMC’s dispositive motions are still pending. The District Court has scheduled a trial date for October 24, 2016.
In a separate litigation matter, on November 26, 2013, EMC filed a complaint against us in the U.S. District Court for the District of Delaware, alleging infringement of five patents held by EMC. The five patents are U.S. Patent No. 6,904,556 entitled “Systems and Methods Which Utilize Parity Sets,” U.S. Patent No. 6,915,475 entitled “Data Integrity Management for Data Storage Systems,” U.S. Patent No. 7,373,464 entitled “Efficient Data Storage System” and the related U.S. Patent No. 7,434,015 entitled “Efficient Data Storage System” and U.S. Patent No. 8,375,187 entitled “I/O Scheduling For Flash Drives.” The complaint seeks damages and injunctive and equitable relief, with respect to the FlashArray 400-Series and predecessor products. Prior to trial, EMC dropped U.S. Patent No. 6,915,475 from the suit, and the District Court found, in a summary judgment ruling, that we did not infringe U.S. Patent No. 8,375,187 and did infringe certain claims of U.S. Patent No. 7,434,015, (’015 patent). The remaining two patents and the validity of ‘015 patent went to trial.
On March 15, 2016, the jury returned a verdict finding that we did not infringe U.S. Patent Nos. 6,904,556 and 7,373,464, and that the ‘015 patent, which the District Court ruled us to have infringed, is valid. The jury awarded EMC $14.0 million in royalty damages for infringement of the '015 patent. The jury declined to award any lost profit damages. On March 21, 2016, EMC filed an additional complaint for infringement of the '015 patent with respect to the FlashArray//m product, which EMC did not seek permission from the District Court to add to the lawsuit when FlashArray//m was launched in June of 2015. This new complaint seeks damages and injunctive and equitable relief based on the District Court's previous ruling with respect to the '015 patent. The infringement ruling represents a reasonably possible loss contingency under the applicable accounting standards of up to $14.0 million. We believed there were strong grounds to challenge the infringement ruling by the District Court and the validity finding by the jury with respect to the ‘015 patent, and thus we challenged the findings with respect to the ‘015 patent in post-trial motions before the District Court. On September 1, 2016, the District Court ruled that we are entitled to a new trial on the issue of validity of the ‘015 patent in light of U.S. Patent No. 6,889,297 (the Sun patent) and dismissed as moot EMC’s motion for a permanent injunction precluding us from using the deduplication technology of the asserted claims of the ‘015 patent. No date has been set for the new trial. At present, we do not believe it is probable that a loss has been incurred. As a result, we have not recorded any loss contingency on our consolidated balance sheet as of July 31, 2016.
On September 1, 2016, a purported securities class action entitled Ramsay v. Pure Storage, Inc., et al. was filed in the Superior Court of the State of California (San Mateo County) against us and certain of our officers, directors, investors and underwriters. The complaint asserts claims under sections 11, 12 and 15 of the Securities Act of 1933, 15 U.S.C. section 77 related to alleged inaccuracies, omissions, misstatements or misrepresentations in our registration statement filed in connection with our initial public offering. While we have not yet responded to the complaint, we believe there is no merit to the allegations and intend to defend ourselves vigorously.
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 consolidated balance sheet as of July 31, 2016.
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.
Stockholders' Equity
Stockholders' Equity
Stockholders’ Equity
Preferred Stock
Upon the closing of our initial public offering (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 July 31, 2016, there were no shares of preferred stock issued or outstanding.
Class A and Class B Common Stock
We have two classes of authorized common stock, Class A common stock and Class B common stock. As of July 31, 2016, 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 July 31, 2016, 71,516,602 shares of Class A common stock were issued and outstanding and 124,949,816 shares of Class B common stock were issued and outstanding.
Equity Incentive Plans
Equity Incentive Plans
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 and serves as the successor to our 2009 Plan. Our 2015 Plan provides for grants of incentive stock options, non-statutory 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. We ceased grants of new awards under our 2009 Plan after the effective date of our 2015 Plan, and no new grants will be made from our 2009 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.
We initially reserved 27,000,000 shares of our Class A 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 February of each of 2016 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.
The exercise price of stock options will generally not be less than 100% of the fair market value of our common stock on the date of grant, as determined by our board of directors.  Our equity awards generally vest over a two to four year period and expire no later than ten years from the date of grant.  
2015 Employee Stock Purchase Plan
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. 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 16th and September 16th of each year, and each offering period will consist of four six-month purchase periods, subject to a reset provision. If the closing stock price on the offering date of a new offering falls below the closing stock price on the offering date of an ongoing offering, the ongoing offering would terminate immediately following the purchase of ESPP shares on the purchase date immediately preceding the new offering and participants in the terminated ongoing offering would automatically be enrolled in the new offering (ESPP reset). 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. The initial offering period began on October 7, 2015 and ended on March 15, 2016 as our closing stock price on the new offering date of March 16, 2016 was lower than the closing stock price on October 7, 2015 which triggered an ESPP reset. The ESPP reset resulted in a modification charge of approximately $10.6 million which is being recognized over the new 24-month offering period.
During the three and six months ended July 31, 2016, we recognized $4.3 million and $8.6 million of stock-based compensation expense related to our 2015 ESPP. As of July 31, 2016, there was $24.9 million of unrecognized stock-based compensation expense related to our 2015 ESPP that is expected to be recognized over the term of the related offering periods.
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, 2016
68,879,087

 
$
6.43

 
7.9
 
$
505,131

Options granted
1,979,000

 
12.70

 
 
 
 

Options exercised
(4,258,667
)
 
1.57

 
 
 
 

Options forfeited/cancelled
(1,492,727
)
 
11.09

 
 
 
 

Balance as of July 31, 2016
65,106,693

 
$
6.83

 
7.5
 
$
432,684

Vested and exercisable as of July 31, 2016
26,456,291

 
$
3.16

 
6.5
 
$
254,711


 
 
The aggregate intrinsic value of options vested and exercisable as of July 31, 2016 is calculated based on the difference between the exercise price and the closing price of $12.60 of our Class A common stock on July 29, 2016.
As of July 31, 2016, total unrecognized employee compensation cost was $172.7 million, which is expected to be recognized over a weighted-average period of approximately 3.2 years.
During the six months ended July 31, 2015 and 2016, we granted options to purchase 83,000 and 780,000 shares of common stock that vest upon satisfaction of a performance condition. No performance shares were issued during the three months ended July 31, 2015 and 2016. For those options that management determined it is probable that the performance condition will be satisfied, we recognized stock-based compensation expense of $514,000 and $1.4 million for the three months ended July 31, 2015 and 2016 and $954,000 and $2.0 million for the six months ended July 31, 2015 and 2016.
 
Restricted Stock Units
A summary of the restricted stock unit activity under our 2015 Plan and related information is as follows:
 
 
Number of Restricted Stock Units Outstanding
 
Weighted-
Average
Grant Date
Fair Value
Unvested Balance as of January 31, 2016
53,000

 
$
16.98

Granted
5,513,900

 
13.46

Vested
(264,648
)
 
14.38

Forfeited
(134,734
)
 
14.51

Unvested Balance as of July 31, 2016
5,167,518

 
$
13.42


 
As of July 31, 2016, total unrecognized employee compensation cost related to outstanding restricted stock units was $64.2 million, which is expected to be recognized over a weighted-average period of approximately 2.9 years.
Stock-Based Compensation Expense
The following table summarizes the components of stock-based compensation expense recognized in the condensed consolidated statements of operations (in thousands):
 
 
Three Months Ended July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Cost of revenue—product
$
40

 
$
181

 
$
96

 
$
287

Cost of revenue—support
521

 
1,712

 
854

 
2,804

Research and development
6,804

 
13,976

 
10,429

 
25,634

Sales and marketing
2,536

 
8,732

 
5,980

 
16,251

General and administrative
1,899

 
3,295

 
3,300

 
5,918

Total stock-based compensation expense
$
11,800

 
$
27,896

 
$
20,659

 
$
50,894

Net Loss per Share Attributable to Common Stockholders
Net Loss per Share Attributable to Common Stockholders
Net Loss per Share Attributable to Common Stockholders
Basic and diluted net loss per share attributable to common stockholders is presented in conformity with the two-class method required for participating securities. 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. 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, unvested restricted stock awards, repurchasable shares from early exercised stock options and shares subject to ESPP withholding 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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Net loss
$
(63,837
)
 
$
(59,550
)
 
$
(112,957
)
 
$
(123,338
)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted
33,688

 
192,730

 
33,154

 
191,026

Net loss per share attributable to common stockholders, basic and diluted
$
(1.89
)
 
$
(0.31
)
 
$
(3.41
)
 
$
(0.65
)


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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Convertible preferred stock (on an if-converted basis)
122,281

 
—

 
122,281

 
—

Stock options to purchase common stock
59,354

 
65,567

 
57,358

 
66,974

Restricted stock units
—

 
4,682

 
—

 
3,046

Early exercised stock options
3,837

 
2,446

 
4,119

 
2,555

Employee stock purchase plan
—

 
953

 
—

 
953

Total
185,472

 
73,648

 
183,758

 
73,528

Income Taxes
Income Taxes
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 loss before income taxes and the provision for income taxes recorded was primarily attributable to changes in our valuation allowance, non-deductible stock-based compensation expense and the tax rate differential between the U.S. and foreign countries.
As of July 31, 2016, 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, 2016.
Segment Information
Segment Information
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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
United States
$
65,603

 
$
122,103

 
$
124,277

 
$
233,330

Rest of the world
19,058

 
41,111

 
34,461

 
69,831

Total revenue
$
84,661

 
$
163,214

 
$
158,738

 
$
303,161


 
Long-lived assets by geographic area are summarized as follows (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
United States
$
50,501

 
$
75,425

Rest of the world
2,128

 
3,098

Total long-lived assets
$
52,629

 
$
78,523

Basis of Presentation and Summary of Significant Accounting Policies (Policies)
Principles of Consolidation 
Principles of Consolidation
The condensed consolidated financial statements include the accounts of the company and our wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Unaudited Interim Consolidated Financial Information 
Unaudited Interim Consolidated Financial Information
The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (U.S. GAAP) and applicable rules and regulations of the Securities and Exchange Commission (the SEC) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in our Annual Report on Form 10-K for the fiscal year ended January 31, 2016.
In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods, but are not necessarily indicative of the results of operations to be anticipated for the full fiscal year 2017 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-element 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 and contingent liabilities, 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 cash collateral for a vendor credit card program and letters of credit related to our leases.
Marketable Securities 
Marketable Securities
We classify our marketable securities as available-for-sale at the time of purchase and reevaluate such classification at each balance sheet date. We may sell these securities at any time for use in current operations even if they have not yet reached maturity. As a result, we classify our securities, including those with maturities beyond twelve months, as current assets in the accompanying condensed consolidated balance sheets. We carry these securities at fair value and record unrealized gains and losses, net of tax, in other comprehensive income (loss), which is reflected as a component of stockholders’ equity. We determine any realized gains or losses on the sale of marketable securities on a specific identification method. In addition, we evaluate our securities to assess whether those with unrealized loss positions are other than temporarily impaired. Realized gains and losses and declines in value deemed to be other than temporary are reported in other income (expense), net, in the condensed consolidated statements of operations.
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.
Recently Adopted Accounting Standard and Recent Accounting Pronouncements Not Yet Adopted 
Recently Adopted Accounting Standard
In March 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2016-09, Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (ASU 2016-09). We elected to early adopt this standard in the second quarter of fiscal 2017 with February 1, 2016 being the effective date of adoption. Under ASU 2016-09, excess tax benefits and deficiencies are recognized prospectively in our provision for income taxes rather than additional paid-in capital. As a result of the adoption, our provision for income taxes decreased by $535,000 during the three months ended April 30, 2016. Additionally, we have elected to account for forfeitures as they occur rather than estimate expected forfeiture using a modified retrospective transition method. Accordingly, we recorded a cumulative-effect adjustment of $2.1 million to accumulated deficit and an increase of stock-based compensation expense of $864,000 during the three months ended April 30, 2016. The impact to our provision for income taxes and stock-based compensation expense of $535,000 and $864,000 in the quarter ended April 30, 2016 were reflected in our net loss for the six months ended July 31, 2016. Finally, ASU 2016-09 requires excess tax benefits to be presented as a component of operating cash flows rather than financing cash flows. We elected to adopt this requirement prospectively and accordingly, prior periods have not been adjusted. Excess tax benefits were not material for all periods presented.
Recent Accounting Pronouncements Not Yet Adopted
In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09), requiring an entity to recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for those goods or services. ASU 2014-09 will supersede nearly all existing revenue recognition guidance under U.S. GAAP when it becomes effective. In August 2015, the FASB issued ASU No. 2015-14, Revenue from Contracts with Customers, deferring the effective date for ASU 2014-09 by one year, and thus, the new standard will be effective for us beginning on February 1, 2018 with early adoption permitted on or after February 1, 2017. This standard may be adopted using either the full or modified retrospective methods. We are currently evaluating adoption methods and the impact of this standard on our consolidated financial statements.
In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (ASU 2016-02). ASU 2016-02 requires lessees to recognize all leases with terms in excess of one year on their balance sheet as a right-of-use asset and a lease liability at the commencement date. The new standard also simplifies the accounting for sale and leaseback transactions. The amendments in this update are effective for us beginning on February 1, 2019 and must be adopted using a modified retrospective method for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. Early adoption is permitted. We are currently evaluating adoption methods and the impact of this standard on our consolidated financial statements.
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 are effective for us beginning on February 1, 2020 with early adoption permitted on or after February 1, 2019. We are currently evaluating the impact of this standard on our consolidated financial statements.

Financial Instruments (Tables)
Summary of Cash Equivalents, Marketable Securities and Restricted Cash by Significant Investment Categories 
The following tables summarize our cash equivalents, marketable securities and restricted cash by significant investment categories as of January 31, 2016 and July 31, 2016 (in thousands):
 
 
As of January 31, 2016
 
Amortized
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Fair
Value
 
Cash Equivalents
 
Restricted Cash
Level 1
 

 
 

 
 

 
 

 
 

 
 

Money market funds
$
45,614

 
$
—

 
$
—

 
$
45,614

 
$
45,614

 
$
—

Level 2
 
 
 
 
 
 
 
 
 
 
 
Certificate of deposits
7,132

 
—

 
—

 
7,132

 
—

 
7,132

Total
$
52,746

 
$
—

 
$
—

 
$
52,746

 
$
45,614

 
$
7,132


 
As of July 31, 2016
 
Amortized
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Fair
Value
 
Cash Equivalents
 
Marketable
Securities
 
Restricted Cash
Level 1
 
 
 
 
 
 
 
 
 
 
 
 
 
Money market accounts
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
12,732

Level 2
 
 
 
 
 
 
 
 
 
 
 
 
 
U.S. government treasury notes
135,581

 
181

 
(3
)
 
135,759

 
18,546

 
117,213

 
—

U.S. government agencies
47,655

 
41

 
(6
)
 
47,690

 
4,001

 
43,689

 
—

Corporate debt securities
200,093

 
1,146

 
(15
)
 
201,224

 
401

 
200,823

 
—

Foreign government bonds
2,624

 
7

 
—

 
2,631

 
—

 
2,631

 
—

Total
$
385,953

 
$
1,375

 
$
(24
)
 
$
387,304

 
$
22,948

 
$
364,356

 
$
12,732

Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity 
The amortized cost and estimated fair value of our marketable securities are shown below by contractual maturity (in thousands):
 
 
As of July 31, 2016
 
Amortized Cost
 
Fair Value
Due within one year
$
78,421

 
$
78,470

Due in one to five years
284,585

 
285,886

Total
$
363,006

 
$
364,356

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 
The following table presents gross unrealized losses and fair values for those investments that were in a continuous unrealized loss position for less than 12 months as of July 31, 2016, aggregated by investment category (in thousands):
 
 
Less than 12 months
 
Fair
Value
 
Unrealized
Loss
U.S. government notes
$
2,002

 
$
(3
)
U.S. government agencies
6,492

 
(6
)
Corporate debt securities
13,689

 
(15
)
Total
$
22,183

 
$
(24
)
Balance Sheet Components (Tables)
Schedule of Property and Equipment, Net 
Property and equipment, net, consists of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Test equipment
$
65,663

 
$
94,914

Computer, equipment and software
31,388

 
45,340

Furniture and fixtures
2,852

 
4,028

Leasehold improvements
4,935

 
7,839

Total property and equipment
104,838

 
152,121

Less: accumulated depreciation and amortization
(52,209
)
 
(73,598
)
Property and equipment, net
$
52,629

 
$
78,523

Schedule of Intangible Assets, Net 
Intangible assets, net, consist of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Technology patents
$
9,125

 
$
10,125

Accumulated amortization
(2,145
)
 
(2,813
)
Intangible assets, net
$
6,980

 
$
7,312

Schedule of Expected Amortization Expenses for Intangible Assets 
As of July 31, 2016, expected amortization expense for intangible assets for each of the next five years and thereafter is as follows (in thousands):
 
Fiscal Years Ending January 31,
Estimated 
Future
Amortization
Expense
Remainder of 2017
$
752

2018
1,504

2019
1,504

2020
1,504

2021
1,504

Thereafter
544

Total
$
7,312

Schedule of Accrued Expenses and Other Liabilities 
Accrued expenses and other liabilities consist of the following (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
Sales and use tax payable
$
299

 
$
150

Accrued professional fees
3,044

 
3,214

Accrued marketing
2,684

 
6,237

Accrued travel and entertainment expenses
2,182

 
3,223

Income tax payable
1,791

 
1,285

Other accrued liabilities
4,076

 
6,355

Total accrued expenses and other liabilities
$
14,076

 
$
20,464

Equity Incentive Plans (Tables)
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, 2016
68,879,087

 
$
6.43

 
7.9
 
$
505,131

Options granted
1,979,000

 
12.70

 
 
 
 

Options exercised
(4,258,667
)
 
1.57

 
 
 
 

Options forfeited/cancelled
(1,492,727
)
 
11.09

 
 
 
 

Balance as of July 31, 2016
65,106,693

 
$
6.83

 
7.5
 
$
432,684

Vested and exercisable as of July 31, 2016
26,456,291

 
$
3.16

 
6.5
 
$
254,711

Summary of Restricted Stock Unit Activity Under 2015 Plan 
A summary of the restricted stock unit activity under our 2015 Plan and related information is as follows:
 
 
Number of Restricted Stock Units Outstanding
 
Weighted-
Average
Grant Date
Fair Value
Unvested Balance as of January 31, 2016
53,000

 
$
16.98

Granted
5,513,900

 
13.46

Vested
(264,648
)
 
14.38

Forfeited
(134,734
)
 
14.51

Unvested Balance as of July 31, 2016
5,167,518

 
$
13.42

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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Cost of revenue—product
$
40

 
$
181

 
$
96

 
$
287

Cost of revenue—support
521

 
1,712

 
854

 
2,804

Research and development
6,804

 
13,976

 
10,429

 
25,634

Sales and marketing
2,536

 
8,732

 
5,980

 
16,251

General and administrative
1,899

 
3,295

 
3,300

 
5,918

Total stock-based compensation expense
$
11,800

 
$
27,896

 
$
20,659

 
$
50,894

Net Loss per Share Attributable to Common Stockholders (Tables)
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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Net loss
$
(63,837
)
 
$
(59,550
)
 
$
(112,957
)
 
$
(123,338
)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted
33,688

 
192,730

 
33,154

 
191,026

Net loss per share attributable to common stockholders, basic and diluted
$
(1.89
)
 
$
(0.31
)
 
$
(3.41
)
 
$
(0.65
)
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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
Convertible preferred stock (on an if-converted basis)
122,281

 
—

 
122,281

 
—

Stock options to purchase common stock
59,354

 
65,567

 
57,358

 
66,974

Restricted stock units
—

 
4,682

 
—

 
3,046

Early exercised stock options
3,837

 
2,446

 
4,119

 
2,555

Employee stock purchase plan
—

 
953

 
—

 
953

Total
185,472

 
73,648

 
183,758

 
73,528

Segment Information (Tables)
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 July 31,
 
Six Months Ended July 31,
 
2015
 
2016
 
2015
 
2016
United States
$
65,603

 
$
122,103

 
$
124,277

 
$
233,330

Rest of the world
19,058

 
41,111

 
34,461

 
69,831

Total revenue
$
84,661

 
$
163,214

 
$
158,738

 
$
303,161

Schedule of Long-Lived Assets by Geographic Area 
Long-lived assets by geographic area are summarized as follows (in thousands):
 
 
As of January 31, 2016
 
As of July 31, 2016
United States
$
50,501

 
$
75,425

Rest of the world
2,128

 
3,098

Total long-lived assets
$
52,629

 
$
78,523

Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Jan. 31, 2016
Apr. 30, 2016
Accounting Standards Update 2016-09, Forfeiture Rate Component
New Accounting Pronouncement, Early Adoption, Effect
Jul. 31, 2016
Accounting Standards Update 2016-09, Forfeiture Rate Component
New Accounting Pronouncement, Early Adoption, Effect
Apr. 30, 2016
Accounting Standards Update 2016-09, Forfeiture Rate Component
Accumulated Deficit
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
 
 
 
 
 
 
 
 
Restricted cash
$ 12,732,000 
 
$ 12,732,000 
 
$ 7,132,000 
 
 
 
Deferred commissions, current
14,000,000 
 
14,000,000 
 
15,700,000 
 
 
 
Deferred income taxes, non-current
14,100,000 
 
14,100,000 
 
14,300,000 
 
 
 
Sales commission expenses
19,600,000 
9,700,000 
37,200,000 
18,600,000 
 
 
 
 
Decrease in provision for income taxes
106,000 
57,000 
526,000 
214,000 
 
(535,000)
535,000 
 
Cumulative-effect adjustment, new accounting standard
 
 
 
 
 
 
 
2,100,000 
Accumulated deficit
(680,752,000)
 
(680,752,000)
 
(555,335,000)
 
 
 
Total stock-based compensation expense
$ 27,896,000 
$ 11,800,000 
$ 50,894,000 
$ 20,659,000 
 
$ 864,000 
$ 864,000 
 
Financial Instruments - Summary of Cash Equivalents, Marketable Securities and Restricted Cash by Significant Investment Categories (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
$ 385,953 
$ 52,746 
Gross Unrealized Gains
1,375 
0 
Gross Unrealized Losses
(24)
0 
Fair Value
387,304 
52,746 
Cash Equivalents
22,948 
45,614 
Marketable Securities
364,356 
0 
Restricted Cash
12,732 
7,132 
Money Market Funds |
Level 1
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
 
45,614 
Gross Unrealized Gains
 
0 
Gross Unrealized Losses
 
0 
Fair Value
 
45,614 
Cash Equivalents
 
45,614 
Restricted Cash
 
0 
Certificate of Deposit |
Level 2
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
 
7,132 
Gross Unrealized Gains
 
0 
Gross Unrealized Losses
 
0 
Fair Value
 
7,132 
Cash Equivalents
 
0 
Restricted Cash
 
7,132 
Money Market Accounts |
Level 1
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
0 
 
Gross Unrealized Gains
0 
 
Gross Unrealized Losses
0 
 
Fair Value
0 
 
Cash Equivalents
0 
 
Marketable Securities
0 
 
Restricted Cash
12,732 
 
U.S. Government Treasury Notes |
Level 2
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
135,581 
 
Gross Unrealized Gains
181 
 
Gross Unrealized Losses
(3)
 
Fair Value
135,759 
 
Cash Equivalents
18,546 
 
Marketable Securities
117,213 
 
Restricted Cash
0 
 
U.S. Government Agencies |
Level 2
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
47,655 
 
Gross Unrealized Gains
41 
 
Gross Unrealized Losses
(6)
 
Fair Value
47,690 
 
Cash Equivalents
4,001 
 
Marketable Securities
43,689 
 
Restricted Cash
0 
 
Corporate Debt Securities |
Level 2
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
200,093 
 
Gross Unrealized Gains
1,146 
 
Gross Unrealized Losses
(15)
 
Fair Value
201,224 
 
Cash Equivalents
401 
 
Marketable Securities
200,823 
 
Restricted Cash
0 
 
Foreign Government Bonds |
Level 2
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Amortized Cost
2,624 
 
Gross Unrealized Gains
7 
 
Gross Unrealized Losses
0 
 
Fair Value
2,631 
 
Cash Equivalents
0 
 
Marketable Securities
2,631 
 
Restricted Cash
$ 0 
 
Financial Instruments - Schedule of Amortized Cost and Estimated Fair Value of Marketable Securities by Contractual Maturity (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
 
Due within one year, Amortized Cost
$ 78,421 
Due in one to five years, Amortized Cost
284,585 
Total, Amortized Cost
363,006 
Due within one year, Fair Value
78,470 
Due in one to five years, Fair Value
285,886 
Total, Fair Value
$ 364,356 
Financial Instruments - Additional Information (Details) (USD $)
Jul. 31, 2016
Investments, Debt and Equity Securities [Abstract]
 
Securities in unrealized loss position for more than 12 months
$ 0 
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, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2016
Schedule Of Available For Sale Securities [Line Items]
 
 
Fair Value of Less Than 12 Months
$ 22,183 
$ 22,183 
Unrealized Losses of Less Than 12 Months
(24)
(24)
Gross realized gains, available-for-sale securities
104 
110 
U.S. Government Notes
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Fair Value of Less Than 12 Months
2,002 
2,002 
Unrealized Losses of Less Than 12 Months
(3)
(3)
U.S. Government Agencies
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Fair Value of Less Than 12 Months
6,492 
6,492 
Unrealized Losses of Less Than 12 Months
(6)
(6)
Corporate Debt Securities
 
 
Schedule Of Available For Sale Securities [Line Items]
 
 
Fair Value of Less Than 12 Months
13,689 
13,689 
Unrealized Losses of Less Than 12 Months
$ (15)
$ (15)
Balance Sheet Components - Schedule of Property and Equipment, Net (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Property Plant And Equipment [Line Items]
 
 
Total property and equipment
$ 152,121 
$ 104,838 
Less: accumulated depreciation and amortization
(73,598)
(52,209)
Property and equipment, net
78,523 
52,629 
Test equipment
 
 
Property Plant And Equipment [Line Items]
 
 
Total property and equipment
94,914 
65,663 
Computer, equipment and software
 
 
Property Plant And Equipment [Line Items]
 
 
Total property and equipment
45,340 
31,388 
Furniture and fixtures
 
 
Property Plant And Equipment [Line Items]
 
 
Total property and equipment
4,028 
2,852 
Leasehold improvements
 
 
Property Plant And Equipment [Line Items]
 
 
Total property and equipment
$ 7,839 
$ 4,935 
Balance Sheet Components - Additional Information (Details) (USD $)
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Balance Sheet Components Disclosure [Abstract]
 
 
 
 
Depreciation and amortization
$ 11,600,000 
$ 7,200,000 
$ 21,700,000 
$ 13,400,000 
Intangible assets amortization expense
$ 342,000 
$ 326,000 
$ 668,000 
$ 652,000 
Balance Sheet Components - Schedule of Intangible Assets, Net (Details) (USD $)
3 Months Ended
Jul. 31, 2016
Jan. 31, 2016
Finite Lived Intangible Assets [Line Items]
 
 
Intangible assets, net
$ 7,312,000 
$ 6,980,000 
Technology patents
 
 
Finite Lived Intangible Assets [Line Items]
 
 
Technology patents
10,125,000 
9,125,000 
Accumulated amortization
(2,813,000)
(2,145,000)
Intangible assets, net
7,312,000 
6,980,000 
Acquired technology patents
$ 1,000,000 
 
Weighted average amortization life
5 years 
 
Balance Sheet Components - Schedule of Expected Amortization Expenses for Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Intangible Assets Net Disclosure [Abstract]
 
 
Remainder of 2017
$ 752 
 
2018
1,504 
 
2019
1,504 
 
2020
1,504 
 
2021
1,504 
 
Thereafter
544 
 
Intangible assets, net
$ 7,312 
$ 6,980 
Balance Sheet Components - Schedule of Accrued Expenses and Other Liabilities (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Balance Sheet Components Disclosure [Abstract]
 
 
Sales and use tax payable
$ 150 
$ 299 
Accrued professional fees
3,214 
3,044 
Accrued marketing
6,237 
2,684 
Accrued travel and entertainment expenses
3,223 
2,182 
Income tax payable
1,285 
1,791 
Other accrued liabilities
6,355 
4,076 
Total accrued expenses and other liabilities
$ 20,464 
$ 14,076 
Commitments and Contingencies - Additional Information (Details) (USD $)
0 Months Ended 0 Months Ended
Mar. 15, 2016
Jul. 31, 2016
Jan. 31, 2016
Jul. 31, 2016
Maximum
Nov. 26, 2013
Patent Infringement
patent
Jul. 31, 2016
Office Facility Leases
lease_agreement
Commitments And Contingencies [Line Items]
 
 
 
 
 
 
Number of lease agreements
 
 
 
 
 
3 
Total operating lease obligations
 
 
 
 
 
$ 39,500,000 
Outstanding letters of credit
 
7,700,000 
7,100,000 
 
 
 
Patent infringement allegations number of patents
 
 
 
 
5 
 
Patent infringement allegations number of patents which went to trial
 
 
 
 
2 
 
Royalty damages
14,000,000.0 
 
 
 
 
 
Reasonably possible loss contingency (up to)
 
 
 
$ 14,000,000.0 
 
 
Stockholders' Equity - Additional Information (Details) (USD $)
Jul. 31, 2016
class
Jan. 31, 2016
Oct. 31, 2015
Class Of Stock [Line Items]
 
 
 
Preferred stock, shares authorized (in shares)
20,000,000 
20,000,000 
20,000,000 
Preferred stock, shares issued (in shares)
0 
0 
 
Number of classes of stock
2 
 
 
Preferred stock, shares outstanding (in shares)
0 
0 
 
Common stock, shares authorized (in shares)
2,250,000,000 
2,250,000,000 
 
Common stock, par value per share (in dollars per share)
$ 0.0001 
$ 0.0001 
 
Common stock, shares issued (in shares)
196,466,000 
190,509,000 
 
Common stock, shares outstanding (in shares)
196,466,000 
190,509,000 
 
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)
$ 0.0001 
$ 0.0001 
 
Common stock, shares issued (in shares)
71,517,000 
28,769,000 
 
Common stock, shares outstanding (in shares)
71,517,000 
28,769,000 
 
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)
$ 0.0001 
$ 0.0001 
 
Common stock, shares issued (in shares)
124,949,816 
161,740,000 
 
Common stock, shares outstanding (in shares)
124,950,000 
161,740,000 
 
Equity Incentive Plans - Additional Information (Details) (USD $)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 3 Months Ended 0 Months Ended 1 Months Ended 3 Months Ended 6 Months Ended 6 Months Ended 1 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
plan
Jul. 31, 2015
Jul. 31, 2016
Performance Shares
Jul. 31, 2015
Performance Shares
Jul. 31, 2016
Performance Shares
Jul. 31, 2015
Performance Shares
Jul. 31, 2016
Restricted Stock Units
Jul. 31, 2016
2015 Equity Incentive Plan
Jul. 31, 2016
2015 Equity Incentive Plan
Minimum
Jul. 31, 2016
2015 Equity Incentive Plan
Maximum
Mar. 16, 2016
2015 Employee Stock Purchase Plan
Aug. 31, 2015
2015 Employee Stock Purchase Plan
period
Jul. 31, 2016
2015 Employee Stock Purchase Plan
Jul. 31, 2016
2015 Employee Stock Purchase Plan
Jul. 29, 2016
Class A Common Stock
Jul. 31, 2016
Class A Common Stock
2015 Equity Incentive Plan
Aug. 31, 2015
Class A Common Stock
2015 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of equity incentive plans
 
 
2 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Shares initially reserved for issuance
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
27,000,000 
 
Increase in shares reserved by percentage of capital stock
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5.00% 
 
Purchase price as percentage of fair market value of common stock
 
 
 
 
 
 
 
 
 
 
100.00% 
 
 
 
 
 
 
 
85.00% 
Equity awards of vest period
 
 
 
 
 
 
 
 
 
 
2 years 
4 years 
 
 
 
 
 
 
 
Equity awards of vest expire period (no later than)
 
 
 
 
 
 
 
 
 
10 years 
 
 
 
 
 
 
 
 
 
Shares reserved for future issuance (in shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3,500,000 
Payroll deductions percentage
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
30.00% 
Share cap for ESPP at purchase date (in shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3,000 
Calendar year gap for ESPP contribution amount
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 25,000 
Number of purchase periods
 
 
 
 
 
 
 
 
 
 
 
 
 
4 
 
 
 
 
 
Purchase period, term
 
 
 
 
 
 
 
 
 
 
 
 
 
6 months 
 
 
 
 
 
Modification charge related to the ESPP reset
 
 
 
 
 
 
 
 
 
 
 
 
10,600,000 
 
 
 
 
 
 
Employee stock purchase plan offering period
 
 
 
 
 
 
 
 
 
 
 
 
24 months 
 
 
 
 
 
 
Total stock-based compensation expense
27,896,000 
11,800,000 
50,894,000 
20,659,000 
1,400,000 
514,000 
2,000,000 
954,000 
 
 
 
 
 
 
4,300,000 
8,600,000 
 
 
 
Unrecognized stock-based compensation expense
 
 
 
 
 
 
 
 
 
 
 
 
 
 
24,900,000 
24,900,000 
 
 
 
Closing price of stock (in dollars per share)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 12.60 
 
 
Unrecognized compensation cost, stock options
172,700,000 
 
172,700,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized compensation cost for stock options, weighted-average period
 
 
3 years 2 months 
 
 
 
 
 
2 years 11 months 
 
 
 
 
 
 
 
 
 
 
Number of options granted, net of cancellations (in shares)
 
 
 
 
 
 
780,000 
83,000 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized compensation cost
 
 
 
 
 
 
 
 
$ 64,200,000 
 
 
 
 
 
 
 
 
 
 
Equity Incentive Plans - Summary of Activity Under the Equity Incentive Plans (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2016
Jul. 31, 2016
Jan. 31, 2016
Options Outstanding, Number of Shares
 
 
 
Options Outstanding, Number of Shares, Beginning balance
 
68,879,087 
 
Options Outstanding, Number of Shares, Options granted
 
1,979,000 
 
Options Outstanding, Number of Shares, Options exercised
 
(4,258,667)
 
Options Outstanding, Number of Shares, Options forfeited/cancelled
 
(1,492,727)
 
Options Outstanding, Number of Shares, Ending balance
65,106,693 
65,106,693 
68,879,087 
Options Outstanding, Number of Shares, Vested and exercisable
26,456,291 
26,456,291 
 
Options Outstanding, Weighted Average Exercise Price
 
 
 
Weighted Average Exercise Price, Beginning balance (in dollars per share)
 
$ 6.43 
 
Weighted Average Exercise Price, Options granted (in dollars per share)
 
$ 12.70 
 
Weighted Average Exercise Price, Options exercised (in dollars per share)
 
$ 1.57 
 
Weighted Average Exercise Price, Options forfeited/cancelled (in dollars per share)
 
$ 11.09 
 
Weighted Average Exercise Price, Ending balance (in dollars per share)
$ 6.83 
$ 6.83 
$ 6.43 
Weighted Average Exercise Price, Vested and exercisable (in dollars per share)
$ 3.16 
$ 3.16 
 
Weighted Average Remaining Contractual Life (Years)
7 years 6 months 
 
7 years 11 months 
Weighted Average Remaining Contractual Life (Years), Vested and exercisable
6 years 6 months 
 
 
Aggregate Intrinsic Value
$ 432,684 
$ 432,684 
$ 505,131 
Aggregate Intrinsic Value, Vested and exercisable
$ 254,711 
$ 254,711 
 
Equity Incentive Plans - Summary of Restricted Stock Unit Activity Under 2015 Plan (Details) (Restricted Stock Units, USD $)
6 Months Ended
Jul. 31, 2016
Restricted Stock Units
 
Number of Restricted Stock Units Outstanding
 
Number of Restricted Stock Units Outstanding, Unvested, Beginning balance (in shares)
53,000 
Number of Restricted Stock Units Outstanding, Granted (in shares)
5,513,900 
Number of Restricted Stock Units Outstanding, Vested (in shares)
(264,648)
Number of Restricted Stock Units Outstanding, Forfeited (in shares)
(134,734)
Number of Restricted Stock Units Outstanding, Unvested, Ending balance (in shares)
5,167,518 
Weighted-Average Grant Date Fair Value
 
Weighted-Average Grant Date Fair Value, Beginning balance (in dollars per share)
$ 16.98 
Weighted-Average Grant Date Fair Value, Granted (in dollars per share)
$ 13.46 
Weighted-Average Grant Date Fair Value, Vested (in dollars per share)
$ 14.38 
Weighted-Average Grant Date Fair Value, Forfeited (in dollars per share)
$ 14.51 
Weighted-Average Grant Date Fair Value, Ending balance (in dollars per share)
$ 13.42 
Equity Incentive Plans - Summary of Stock-Based Compensation Expenses (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
$ 27,896 
$ 11,800 
$ 50,894 
$ 20,659 
Cost of revenue—product
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
181 
40 
287 
96 
Cost of revenue—support
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
1,712 
521 
2,804 
854 
Research and development
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
13,976 
6,804 
25,634 
10,429 
Sales and marketing
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
8,732 
2,536 
16,251 
5,980 
General and administrative
 
 
 
 
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
 
 
 
 
Total stock-based compensation expense
$ 3,295 
$ 1,899 
$ 5,918 
$ 3,300 
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 $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Earnings Per Share [Abstract]
 
 
 
 
Net loss
$ (59,550)
$ (63,837)
$ (123,338)
$ (112,957)
Weighted-average shares used in computing net loss per share attributable to common stockholders, basic and diluted (in shares)
192,730 
33,688 
191,026 
33,154 
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)
$ (0.31)
$ (1.89)
$ (0.65)
$ (3.41)
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)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
 
 
 
 
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)
73,648 
185,472 
73,528 
183,758 
Stock options to purchase common stock
 
 
 
 
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
 
 
 
 
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)
65,567 
59,354 
66,974 
57,358 
Restricted stock units
 
 
 
 
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
 
 
 
 
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)
4,682 
0 
3,046 
0 
Early exercised stock options
 
 
 
 
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
 
 
 
 
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)
2,446 
3,837 
2,555 
4,119 
Employee stock purchase plan
 
 
 
 
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
 
 
 
 
Anti-dilutive securities excluded from computation of earnings per share, amount (in shares)
953 
0 
953 
0 
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 (in shares)
0 
122,281 
0 
122,281 
Segment Information - Additional Information (Details)
3 Months Ended 6 Months Ended
Jul. 31, 2016
segment
Jul. 31, 2016
segment
Segment Reporting [Abstract]
 
 
Number of business activity
 
1 
Number of reportable segments
1 
 
Segment Information - Schedule of Revenue by Geographic Area (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 31, 2016
Jul. 31, 2015
Jul. 31, 2016
Jul. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
 
 
Total revenue
$ 163,214 
$ 84,661 
$ 303,161 
$ 158,738 
United States
 
 
 
 
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
 
 
Total revenue
122,103 
65,603 
233,330 
124,277 
Rest of the world
 
 
 
 
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
 
 
Total revenue
$ 41,111 
$ 19,058 
$ 69,831 
$ 34,461 
Segment Information - Schedule of Long-Lived Assets by Geographic Area (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2016
Jan. 31, 2016
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
Total long-lived assets
$ 78,523 
$ 52,629 
United States
 
 
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
Total long-lived assets
75,425 
50,501 
Rest of the world
 
 
Revenues From External Customers And Long Lived Assets [Line Items]
 
 
Total long-lived assets
$ 3,098 
$ 2,128