Splunk (SPLK) 10-Q 10 Dec 15 2016 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
Entity Registrant Name	SPLUNK INC
Entity Central Index Key	1,353,283
Document Type	10-Q
Document Period End Date	Oct. 31, 2015
Amendment Flag	false
Current Fiscal Year End Date	--01-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		129,704,691
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Current assets:
Cash and cash equivalents	$ 501,691	$ 387,315
Investments, current portion	446,840	462,849
Accounts receivable, net	125,657	128,413
Prepaid expenses and other current assets	20,721	21,256
Total current assets	1,094,909	999,833
Investments, non-current	1,500	165,082
Property and equipment, net	100,264	50,374
Intangible assets, net	52,693	10,416
Goodwill	124,306	19,070
Other assets	5,440	3,016
Total assets	1,379,112	1,247,791
Current liabilities:
Accounts payable	4,205	3,726
Accrued payroll and compensation	78,213	65,220
Accrued expenses and other liabilities	37,545	27,819
Deferred revenue, current portion	282,547	249,883
Total current liabilities	402,510	346,648
Deferred revenue, non-current	66,341	54,202
Other liabilities, non-current	69,315	33,620
Total non-current liabilities	135,656	87,822
Total liabilities	$ 538,166	$ 434,470
Commitments and contingencies (Note 3)
Stockholders' equity:
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 129,610,416 shares issued and outstanding at October 31, 2015, and 123,538,492 shares issued and outstanding at January 31, 2015	$ 130	$ 123
Accumulated other comprehensive loss	(2,298)	(837)
Additional paid-in capital	1,429,386	1,200,858
Accumulated deficit	(586,272)	(386,823)
Total stockholders' equity	840,946	813,321
Total liabilities and stockholders' equity	$ 1,379,112	$ 1,247,791

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Oct. 31, 2015	Jan. 31, 2015
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	129,610,416	123,538,492
Common stock, shares outstanding	129,610,416	123,538,492

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Revenues
License		$ 104,164	$ 71,754	$ 263,996	$ 185,109
Maintenance and services		70,256	44,275	184,415	118,374
Total revenues		174,420	116,029	448,411	303,483
Cost of revenues
License	[1]	3,136	535	6,110	685
Maintenance and services	[1]	27,455	17,045	72,606	46,153
Total cost of revenues	[1]	30,591	17,580	78,716	46,838
Gross profit		143,829	98,449	369,695	256,645
Operating expenses
Research and development	[1]	56,186	39,534	149,192	103,455
Sales and marketing	[1]	130,131	85,720	343,906	236,776
General and administrative	[1]	29,857	21,446	85,489	75,125
Total operating expenses	[1]	216,174	146,700	578,587	415,356
Operating loss		(72,345)	(48,251)	(208,892)	(158,711)
Interest and other income (expense), net
Interest income, net		377	199	1,162	492
Other income (expense), net		(271)	(52)	(477)	(326)
Total interest and other income (expense), net		106	147	685	166
Loss before income taxes		(72,239)	(48,104)	(208,207)	(158,545)
Income tax provision		735	447	(8,758)	1,543
Net loss		$ (72,974)	$ (48,551)	$ (199,449)	$ (160,088)
Net loss per share:
Basic and diluted (in dollars per share)		$ (0.57)	$ (0.40)	$ (1.58)	$ (1.35)
Weighted-average shares outstanding:
Basic and diluted (in shares)		128,368	120,331	126,534	118,895
Stock-based compensation				$ 203,882	$ 150,985
Cost of revenues
Weighted-average shares outstanding:
Stock-based compensation		$ 6,384	$ 4,039	18,578	11,653
Research and development
Weighted-average shares outstanding:
Stock-based compensation		22,534	15,352	61,910	41,517
Sales and marketing
Weighted-average shares outstanding:
Stock-based compensation		33,247	21,075	91,067	61,458
General and administrative
Weighted-average shares outstanding:
Stock-based compensation		$ 11,999	$ 7,770	$ 32,327	$ 36,357
[1]	Amounts include stock-based compensation expense, as follows: Cost of revenues, $6,384 thousand, $4,039 thousand, $18,578 thousand and $11,653 thousand; Research and development, $22,534 thousand , $15,352 thousand, $61,910 thousand and $41,517 thousand;; Sales and marketing, $33,247 thousand, $21,075 thousand, $91,067 thousand and $61,458 thousand; General and administrative, $11,999 thousand, $7,770 thousand, $32,327 thousand and $36,357 thousand for the three and nine months ended October 31, 2015 and 2014, respectively.

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Stock-based compensation			$ 203,882	$ 150,985
Cost of revenues
Stock-based compensation	$ 6,384	$ 4,039	18,578	11,653
Research and development
Stock-based compensation	22,534	15,352	61,910	41,517
Sales and marketing
Stock-based compensation	33,247	21,075	91,067	61,458
General and administrative
Stock-based compensation	$ 11,999	$ 7,770	$ 32,327	$ 36,357

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (72,974)	$ (48,551)	$ (199,449)	$ (160,088)
Other comprehensive gain (loss):
Net unrealized loss on investments	(47)	(57)	(92)	(61)
Foreign currency translation adjustments	(87)	(190)	(1,369)	(202)
Total other comprehensive loss	(134)	(247)	(1,461)	(263)
Comprehensive loss	$ (73,108)	$ (48,798)	$ (200,910)	$ (160,351)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Cash flows from operating activities
Net loss	$ (199,449)	$ (160,088)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	13,467	8,968
Amortization of investment premiums	1,049	452
Stock-based compensation	203,882	150,985
Deferred income taxes	(11,416)	(793)
Excess tax benefit from employee stock plans	(995)	(1,108)
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable, net	2,756	798
Prepaid expenses, other current and non-current assets	15,630	(2,041)
Accounts payable	384	1,045
Accrued payroll and compensation	12,341	4,605
Accrued expenses and other liabilities	(3,839)	12,673
Deferred revenue	44,803	36,956
Net cash provided by operating activities	78,613	52,452
Cash flows from investing activities
Purchases of investments	(219,195)	(691,277)
Maturities of investments	399,145	63,000
Acquisitions, net of cash acquired	(142,693)	(2,500)
Purchases of property and equipment	(24,496)	(11,200)
Other investment activities	(1,500)	0
Net cash provided by (used in) investing activities	11,261	(641,977)
Cash flows from financing activities
Proceeds from exercise of stock options	12,696	12,805
Excess tax benefit from employee stock plans	995	1,108
Proceeds from employee stock purchase plans	10,906	8,355
Payment related to build-to-suit lease obligation	0	(523)
Net cash provided by financing activities	24,597	21,745
Effect of exchange rate changes on cash and cash equivalents	(95)	(120)
Net increase (decrease) in cash and cash equivalents	114,376	(567,900)
Cash and cash equivalents
Beginning of period	387,315	897,453
End of period	501,691	329,553
Supplemental disclosures
Cash paid for income taxes	935	877
Non-cash investing and financing activities
Change in accrued purchases of property and equipment	343	477
Vesting of early exercised options	56	84
Change in capitalized construction costs related to build-to-suit lease	$ 33,119	$ 23,085

Description of the Business and

Description of the Business and Significant Accounting Policies	9 Months Ended
	Oct. 31, 2015
Accounting Policies [Abstract]
Description of the Business and Significant Accounting Policies	Description of the Business and Significant Accounting Policies Business Splunk Inc. (“we,” "us," "our") provides innovative software products that enable organizations to gain real-time operational intelligence by harnessing the value of their data. Our products enable users to collect, index, search, explore, monitor and analyze data regardless of format or source. Our products address large and diverse data sets, commonly referred to as big data, and are specifically tailored for machine-generated data. Machine data is produced by nearly every software application and electronic device and contains a definitive, time-stamped record of various activities, such as transactions, customer and user activities and security threats. Our products help users derive new insights from machine data that can be used to, among other things, improve service levels, reduce operational costs, mitigate security risks, demonstrate and maintain compliance, and drive better business decisions. We were incorporated in California in October 2003 and reincorporated in Delaware in May 2006. Fiscal Year Our fiscal year ends on January 31. References to fiscal 2016 or fiscal year 2016, for example, refer to the fiscal year ending January 31, 2016. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet data as of January 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the fiscal year ended January 31, 2015, filed with the SEC on March 31, 2015. There have been no changes in the significant accounting policies from those that were disclosed in the audited consolidated financial statements for the fiscal year ended January 31, 2015 included in the Annual Report on Form 10-K. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to state 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 2016. Recently Issued Accounting Pronouncements In November 2015, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") No. 2015-17, Balance Sheet Classification of Deferred Taxes, which eliminates the current requirement for an entity to separate deferred income tax liabilities and assets into current and non-current amounts in the condensed consolidated balance sheets. To simplify the presentation of deferred income taxes, the amendments in this ASU require that deferred tax liabilities and assets be classified as non-current in the condensed consolidated balance sheets. The standard is effective for us for our first quarter of fiscal 2018, although early adoption is permitted. We are currently evaluating adoption methods and whether this standard will have a material impact on our condensed consolidated financial statements. In September 2015, the FASB issued ASU No. 2015-16, Simplifying the Accounting for Measurement-Period Adjustments, which requires that an acquirer recognize adjustments to provisional amounts that are identified during the measurement period after an acquisition within the reporting period they are determined. This is a change from the previous requirement that the adjustments be recorded retrospectively. The ASU also requires disclosure of the effect on earnings of changes in depreciation, amortization or other income effects, if any, as a result of the adjustment to the provisional amounts, calculated as if the accounting had been completed at the acquisition date. The standard is effective for us for our first quarter of fiscal 2017, although early adoption is permitted. We are currently evaluating adoption methods and whether this standard will have a material impact on our condensed consolidated financial statements. In April 2015, the FASB issued ASU No. 2015-05, Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement, which provides guidance to customers about whether a cloud computing arrangement includes a software license. If a cloud computing arrangement includes a software license, then the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If the arrangement does not include a software license, then the customer should account for the arrangement as a service contract. The standard is effective for us for our first quarter of fiscal 2017, although early adoption is permitted, and will be applied on either a prospective or retrospective basis. We are currently evaluating adoption methods and whether this standard will have a material impact on our condensed consolidated financial statements. In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606), which supersedes the revenue recognition requirements in Accounting Standards Codification 605, Revenue Recognition. This ASU is based on the principle that revenue is recognized to depict the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The ASU also requires additional disclosure about the nature, amount, timing and uncertainty of revenues and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. In August 2015, the FASB issued ASU No. 2015-14, which provides a one-year deferral in the effective date of ASU No. 2014-09. Early adoption will be permitted, but not earlier than the original effective date for annual and interim periods. In accordance with the deferral, the effective date applicable to us will be the first quarter of fiscal 2019. We have not yet selected a transition method and we are currently evaluating the effect that the updated standard will have on our condensed consolidated financial statements and related disclosures. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting periods covered by the financial statements and accompanying notes. In particular, we make estimates with respect to the fair value of multiple elements in revenue recognition, uncollectible accounts receivable, the assessment of the useful life and recoverability of long-lived assets (property and equipment, goodwill and identified intangibles), stock-based compensation expense, the fair value of assets acquired and liabilities assumed for business combinations, income taxes and contingencies. Actual results could differ from those estimates. Segments We operate our business as one operating segment: the development and marketing of software products that enable our customers to gain real-time operational intelligence by harnessing the value of their data. Our chief operating decision maker is our Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources. Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Splunk Inc. and its direct and indirect wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation. Foreign Currency The functional currency of our foreign subsidiaries is the respective local currency. Translation adjustments arising from the use of differing exchange rates from period to period are included in Accumulated Other Comprehensive Loss within Stockholders' Equity. Foreign currency transaction gains and losses are included in Other income (expense), net and were not material for the three and nine months ended October 31, 2015 and 2014. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. All of our revenues are generated in U.S. dollars. Our expenses are generally denominated in the currencies in which our operations are located and are translated at the average exchange rate during the period. Equity related transactions are translated using historical exchange rates. Foreign Currency Contracts In the first quarter of fiscal 2016, we began to use foreign currency forward contracts as a part of our strategy to manage exposure related to foreign currency denominated monetary assets and liabilities. These contracts typically have maturities of one month. They are not designated as cash flow or fair value hedges under ASC Topic 815, Derivatives and Hedging. These contracts hedge assets and liabilities that are denominated in foreign currencies and are carried at fair value as either assets or liabilities on the condensed consolidated balance sheets with changes in the fair value recorded to Other income (expense), net in the condensed consolidated statements of operations. Investments We determine the appropriate classification of our investments at the time of purchase and reevaluate such determination at each balance sheet date. Securities are classified as available-for-sale and are carried at fair value, with the change in unrealized gains and losses, net of tax, reported as a separate component on the consolidated statements of comprehensive income (loss). Fair value is determined based on quoted market rates when observable or utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on securities available for sale are included as a component of investment income. In order to determine whether a decline in value is other-than-temporary, we evaluate, among other factors, the duration and extent to which the fair value has been less than the carrying value and our intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available-for-sale is included as a component of interest income. Business Combinations We use our best estimates and assumptions to allocate the fair value of purchase consideration to the tangible assets acquired, liabilities assumed and intangible assets acquired based on their estimated fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Our estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. We continue to collect information and reevaluate these estimates and assumptions quarterly and record any adjustments to our preliminary estimates to goodwill provided that we are within the measurement period. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our condensed consolidated statements of operations.

Investments and Fair Value Meas

Investments and Fair Value Measurements	9 Months Ended
	Oct. 31, 2015
Investments, Debt And Equity Securities And Fair Value Disclosures [Abstract]
Investments and Fair Value Measurements	Investments and Fair Value Measurements The carrying amounts of certain of our financial instruments including cash equivalents, accounts receivable, accounts payable and accrued liabilities approximate fair value due to their short-term maturities. Assets and liabilities recorded at fair value in the financial statements are categorized based upon the level of judgment associated with the inputs used to measure their fair value. Hierarchical levels that are directly related to the amount of subjectivity associated with the inputs to the valuation of these assets or liabilities are as follows: Level 1—Observable inputs, such as quoted prices in active markets for identical assets or liabilities. Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities, quoted prices in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires management to make judgments and consider factors specific to the asset or liability. The following table sets forth the fair value of our financial assets and liabilities that were measured on a recurring basis as of October 31, 2015 and January 31, 2015 (in thousands): October 31, 2015 January 31, 2015 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds $ 503,560 $ — $ — $ 503,560 $ 374,682 $ — $ — $ 374,682 U.S. treasury securities — 446,840 — 446,840 — 627,931 — 627,931 Other — — 1,500 1,500 — — — — Reported as: Assets: Cash and cash equivalents $ 503,560 $ 374,682 Investments, current portion 446,840 462,849 Investments, non-current 1,500 165,082 Total $ 951,900 $ 1,002,613 The following table represents our investments in U.S. treasury securities, which we have classified as available-for-sale investments as of October 31, 2015 (in thousands): October 31, 2015 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments, current portion: U.S. treasury securities $ 446,929 $ 28 $ (117 ) $ 446,840 Total available-for-sale investments in U.S. treasury securities $ 446,929 $ 28 $ (117 ) $ 446,840 As of October 31, 2015 , the following marketable securities were in an unrealized loss position (in thousands): Less than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasury securities $ 247,148 $ (109 ) $ 37,066 $ (8 ) $ 284,214 $ (117 ) As of October 31, 2015 , we did not consider any of our investments to be other-than-temporarily impaired. The contractual maturities of our investments in U.S. treasury securities are as follows (in thousands): October 31, 2015 Due within one year $ 446,840 Total $ 446,840 Investments with maturities of less than 12 months from the balance sheet date are classified as current assets, which are available for use to fund current operations. Investments with maturities greater than 12 months from the balance sheet date are classified as long-term assets. Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs We invested in a two-year convertible promissory note of a privately-held company that we have classified as an available-for-sale investment and is included in investments, non-current, on our condensed consolidated balance sheets. This investment is recorded at fair value using significant unobservable inputs or data in an inactive market and the valuation requires our judgment due to the absence of quoted prices in active markets and inherent lack of liquidity. Unrealized gains and losses on our available-for-sale investment are excluded from earnings and reported, net of tax, as a separate component on the consolidated statements of comprehensive income (loss). During the three months ended October 31, 2015, we have not recognized any unrealized gains or losses or an other-than-temporary impairment charge on our investment. The carrying value of our convertible promissory note investment was $1.5 million as of October 31, 2015.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Office Lease Commitments We lease our office spaces under non-cancelable leases with rent expense recognized on a straight-line basis over the lease term. Rent expense was $3.3 million and $2.6 million for the three months ended October 31, 2015 and 2014 , respectively, and $9.6 million and $7.5 million for the nine months ended October 31, 2015 and 2014 , respectively. On August 24, 2015, we entered into an office lease for approximately 235,000 square feet located at 500 Santana Row, San Jose, California. This lease is expected to commence in the third quarter of fiscal 2017 for a term of 10 years and nine months, subject to the completion of certain pre-occupancy improvements by our landlord. Our total obligation for the base rent is approximately $120.5 million . On April 29, 2014, we entered into an office lease (the "Lease") for approximately 182,000 square feet located at 270 Brannan Street, San Francisco, California (the "Premises"). The Premises will be allocated to approximately 95,000 square feet of rentable space (the "Initial Premises") and approximately 87,000 square feet of rentable space (the "Additional Premises"). We expect to occupy the Premises in the first quarter of fiscal 2017. The term of the Additional Premises begins one year after the Initial Premises and each have a term of 84 months. Our total obligation for the base rent is approximately $92.0 million . On May 13, 2014, we entered into an irrevocable, standby letter of credit with Silicon Valley Bank for $6.0 million to serve as a security deposit for the Lease. As a result of our involvement during the construction period, whereby we have certain indemnification obligations related to the construction, we are considered for accounting purposes only, the owner of the construction project under build-to-suit lease accounting. We have recorded estimated project construction costs incurred by the landlord as an asset and a corresponding long term liability in “Property and equipment, net” and “Other liabilities, non-current” respectively, on our condensed consolidated balance sheets. We will increase the asset and corresponding long term liability as additional building costs are incurred by the landlord during the construction period. Once the landlord completes the construction of the Initial Premises, which is estimated to be in January 2016, we will evaluate the Lease in order to determine whether or not the Lease meets the criteria for “sale-leaseback” treatment. The following summarizes our contractual commitments and obligations as of October 31, 2015 (in thousands): Payments Due by Period* Total Less Than 1 1-3 years 3-5 years More Than 5 Office lease obligations $ 269,126 $ 17,793 $ 64,139 $ 60,730 $ 126,464 _________________________ *We entered into sublease agreements for portions of our office spaces in London and Virginia, and the future sublease rental income of $1.3 million has been included as an offset to our future minimum rental payments. Legal Proceedings We are subject to certain routine legal and regulatory proceedings, as well as demands and claims that arise in the normal course of our business. We make a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed at least quarterly and adjusted to reflect the impact of negotiations, estimated settlements, legal rulings, advice of legal counsel and other information and events pertaining to a particular matter. In our opinion, resolution of any pending claims (either individually or in the aggregate) is not expected to have a material adverse impact on our consolidated results of operations, cash flows or financial position, nor is it possible to provide an estimated amount of any such loss. However, depending on the nature and timing of any such dispute, an unfavorable resolution of a matter could materially affect our future results of operations or cash flows, or both, in a particular quarter. Indemnification Arrangements During the ordinary course of business, we may indemnify, hold harmless and agree to reimburse for losses suffered or incurred, our customers, vendors, and each of their affiliates for certain intellectual property infringement and other claims by third parties with respect to our products and services, in connection with our commercial license arrangements or related to general business dealings with those parties. As permitted under Delaware law, we have entered into indemnification agreements with our officers, directors and certain employees, indemnifying them for certain events or occurrences while they serve as our officers or directors or those of our direct and indirect subsidiaries. To date, there have not been any costs incurred in connection with such indemnification obligations; therefore, there is no accrual of such amounts at October 31, 2015 . We are unable to estimate the maximum potential impact of these indemnifications on our future results of operations.

Property and Equipment

Property and Equipment	9 Months Ended
	Oct. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment are stated at cost, net of accumulated depreciation and amortization. These assets are depreciated and amortized using the straight-line method over their estimated useful lives. Property and equipment consisted of the following (in thousands): As of October 31, 2015 January 31, 2015 Computer equipment and software $ 36,489 $ 28,342 Furniture and fixtures 10,506 7,707 Leasehold improvements (1) 23,361 10,146 Construction in progress (2) 62,479 29,360 132,835 75,555 Less: accumulated depreciation and amortization (32,571 ) (25,181 ) Property and equipment, net $ 100,264 $ 50,374 _________________________ (1) Includes costs related to assets not yet placed into service of $11.5 million and $0.6 million , as of October 31, 2015 and January 31, 2015, respectively. (2) This relates to the capitalization of construction costs in connection with our build-to-suit lease obligation, where we are considered the owner of the asset during the construction period for accounting purposes only. There is a corresponding long-term liability for this obligation on our condensed consolidated balance sheets under “Other liabilities, non-current.” Refer to Note 3 “Commitments and Contingencies” for details. Depreciation and amortization expense on Property and Equipment, net was $2.5 million and $2.0 million for the three months ended October 31, 2015 and 2014 , respectively, and $7.4 million and $5.7 million for the nine months ended October 31, 2015 and 2014, respectively.

Acquisitions, Goodwill and Inta

Acquisitions, Goodwill and Intangible Assets	9 Months Ended
	Oct. 31, 2015
Business Combinations [Abstract]
Acquisitions, Goodwill and Intangible Assets	Acquisitions, Goodwill and Intangible Assets Metafor Software On June 23, 2015, we acquired 100% of the voting equity interest of Metafor Software Inc. ("Metafor Software"), a privately-held British Columbia corporation, which develops technology that provides anomaly detection and behavioral analytics for IT operations. This acquisition has been accounted for as a business combination. The purchase price of $16.4 million , paid in cash, was preliminarily allocated as follows: $2.7 million to identifiable intangible assets, $0.5 million to net assets acquired and $0.1 million to net deferred tax assets, with the excess $13.1 million of the purchase price over the fair value of net tangible and intangible assets acquired recorded as goodwill, allocated to our one operating segment. Goodwill is primarily attributable to the value expected from the synergies of the combination, including accelerating our anomaly detection capabilities for our core IT operations and security use cases. This goodwill is not deductible for income tax purposes. The results of operations of Metafor Software, which are not material, have been included in our condensed consolidated financial statements from the date of purchase. Pro forma results of operations of Metafor Software have not been presented as we do not consider the results to have a material effect on any of the periods presented in our condensed consolidated statements of operations. We are still finalizing the allocation of the purchase price, which may be subject to change as additional information becomes available to us. The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition (in thousands, except useful life): Fair Value Useful Life (months) Developed technology $ 2,300 48 Other acquired intangible assets 370 36 Total intangible assets acquired $ 2,670 Caspida On July 9, 2015, we acquired 100% of the voting equity interest of Caspida, Inc. ("Caspida"), a privately-held Delaware corporation, which develops technology that provides behavioral analytics to help detect, respond to and mitigate advanced security threats and insider security threats. This acquisition has been accounted for as a business combination. The purchase price of $128.4 million , paid in cash, was preliminarily allocated as follows: $45.8 million to identifiable intangible assets, $11.4 million to net deferred tax liability and $1.2 million to net assets acquired, with the excess $92.8 million of the purchase price over the fair value of net tangible and intangible assets acquired recorded as goodwill, allocated to our one operating segment. Goodwill is primarily attributable to the value expected from the synergies of the combination, including combined selling opportunities with our products as well as our ability to sell into the security market. This goodwill is not deductible for income tax purposes. The results of operations of Caspida, which are not material, have been included in our condensed consolidated financial statements from the date of purchase. We are still finalizing the allocation of the purchase price, which may be subject to change as additional information becomes available to us. Additionally, we recognized $1.7 million of acquisition-related costs as general and administrative expense on our condensed consolidated statements of operations. Per the terms of the merger agreement with Caspida, certain unvested shares of stock and unvested stock options held by Caspida employees were cancelled and exchanged for unvested restricted stock units and replacement stock options to purchase shares of our common stock under our 2012 Equity Incentive Plan. Additionally, certain shares of stock held by key employees of Caspida were cancelled and exchanged for unregistered restricted shares of our common stock subject to vesting. The fair value of $61.6 million of these issued awards, which are subject to the recipient's continued service with us and thus excluded from the purchase price, will be recognized ratably as stock-based compensation expense over the required service period. The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition (in thousands, except useful life): Fair Value Useful Life (months) Developed technology $ 44,300 72 In-process research and development 1,300 Indefinite* Customer relationships 190 36 Total intangible assets acquired $ 45,790 ______________________ *The in-process research and development is considered an indefinite-lived intangible asset until the completion or abandonment of the associated research and development efforts. Unaudited Pro Forma Financial Information The following unaudited pro forma information presents the combined results of operations as if the acquisition of Caspida had been completed on February 1, 2014, the beginning of the comparable prior annual reporting period. The unaudited pro forma results include: (i) amortization associated with preliminary estimates for the acquired intangible assets; (ii) recognition of post-acquisition stock-based compensation; and (iii) the associated tax impact on these unaudited pro forma adjustments. The unaudited pro forma results do not reflect any cost saving synergies from operating efficiencies or the effect of the incremental costs incurred in integrating the two companies. Accordingly, these unaudited pro forma results are presented for informational purpose only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the acquisition had occurred at the beginning of the period presented, nor are they indicative of future results of operations (in thousands, except per share amounts): Three Months Ended October 31, Nine Months 2015 2014 2015 2014 Revenues $ 174,420 $ 116,029 $ 448,411 $ 303,483 Net loss $ (72,953 ) $ (55,166 ) $ (222,515 ) $ (166,454 ) Basic and diluted net loss per share $ (0.57 ) $ (0.46 ) $ (1.76 ) $ (1.40 ) Goodwill Goodwill balances are presented below (in thousands): Carrying amount Balance as of January 31, 2015 $ 19,070 Goodwill acquired 105,916 Foreign currency translation adjustments (680 ) Balance as of October 31, 2015 $ 124,306 Intangible Assets Intangible assets subject to amortization obtained from acquisitions as of October 31, 2015 are as follows (in thousands, except useful life): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life (months) Developed technology $ 59,370 $ (9,113 ) $ 50,257 61 Customer relationships 1,810 (1,137 ) 673 16 Other acquired intangible assets 1,180 (717 ) 463 27 Total intangible assets subject to amortization $ 62,360 $ (10,967 ) $ 51,393 Additionally, we obtained $1.3 million of in-process research and development upon the acquisition of Caspida, which has an indefinite useful life. We will assess the carrying value and useful life of the asset once the associated research and development efforts are completed. Amortization expense from acquired intangible assets was $ 3.1 million and $1.4 million for the three months ended October 31, 2015 and 2014 , respectively, and $6.1 million and $3.2 million for the nine months ended October 31, 2015 and 2014 , respectively. The expected future amortization expense for acquired intangible assets as of October 31, 2015 is as follows (in thousands): Fiscal Period: Remaining three months of fiscal 2016 $ 3,112 Fiscal 2017 11,921 Fiscal 2018 10,272 Fiscal 2019 8,014 Fiscal 2020 7,615 Fiscal 2021 7,383 Thereafter 3,076 Total amortization expense $ 51,393

Debt Financing Facilities

Debt Financing Facilities	9 Months Ended
	Oct. 31, 2015
Debt Disclosure [Abstract]
Debt Financing Facilities	Debt Financing Facilities On May 9, 2013 we entered into a Loan Agreement with Silicon Valley Bank, which was most recently amended in May 2015. As amended, the agreement provides for a revolving line of credit facility, which expires May 9, 2017. Under the agreement, we are able to borrow up to $25 million . Interest on any drawdown under the revolving line of credit accrues either at the prime rate ( 3.25% in October 2015) or the LIBOR rate plus 2.75% . As of October 31, 2015 , we had no balance outstanding under this agreement. The agreement contains customary financial covenants and other affirmative and negative covenants. We were in compliance with all covenants as of October 31, 2015 .

Stock Compensation Plans

Stock Compensation Plans	9 Months Ended
	Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Compensation Plans	Stock Compensation Plans The following table summarizes the stock option, restricted stock unit ("RSU") and performance unit ("PSU") award activity during the nine months ended October 31, 2015 : Options Outstanding RSUs and PSUs Outstanding Shares Available for Grant Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (1) Shares (in years) (in thousands) Balances as of January 31, 2015 6,718,878 6,536,855 $ 5.76 5.59 $ 301,532 12,480,368 Additional shares authorized 6,176,924 Options granted (86,753 ) 86,753 1.30 Options exercised (2,452,495 ) 5.18 Options forfeited and expired 139,851 (139,851 ) 32.53 RSUs and PSUs granted (3,399,028 ) 3,399,028 RSUs vested (2,690,456 ) RSUs forfeited and canceled 1,104,176 (1,104,176 ) Balances as of October 31, 2015 10,654,048 4,031,262 $ 5.09 4.60 $ 206,052 12,084,764 Vested and expected to vest 4,029,452 $ 5.09 4.59 $ 205,964 11,743,557 Exercisable as of October 31, 2015 3,565,104 $ 4.14 4.32 $ 185,567 _________________________ (1) The intrinsic value is calculated as the difference between the exercise price of the underlying stock option award and the closing market price of our common stock as of October 31, 2015 . During fiscal 2016, we granted PSUs to certain executives under our 2012 Equity Incentive Plan. The number of PSUs earned and eligible to vest will be determined after a one year performance period, based on achievement of certain company financial performance measures and the recipient's continued service with us. The number of shares of our stock to be received at vesting can range from 0% to 200% of the target amount. Compensation expense for PSUs is measured using the fair value at the date of grant and recorded over the vesting period under the graded-vesting attribution method, and may be adjusted over the vesting period based on interim estimates of performance against the pre-set objectives. During the nine months ended October 31, 2015 , $1.0 million of tax benefits have been realized from exercised stock options. At October 31, 2015 , total unrecognized compensation cost related to these stock options was $7.0 million , adjusted for estimated forfeitures, which is expected to be recognized over a weighted-average period of 0.8 years . At October 31, 2015 , total unrecognized compensation cost was $566.9 million related to RSUs, adjusted for estimated forfeitures, which is expected to be recognized over the next 2.7 years. At October 31, 2015 , total unrecognized compensation cost was $13.3 million related to PSUs, adjusted for estimated forfeitures, which is expected to be recognized over the next 3.4 years. Additionally, during the nine months ended October 31, 2015, we issued 671,782 restricted shares of our common stock ("RSAs") and at October 31, 2015, total unrecognized compensation cost was $38.5 million related to RSAs, adjusted for estimated forfeitures, which is expected to be recognized over the next 3.2 years. The total intrinsic value of options exercised during the nine months ended October 31, 2015 was $147.9 million . The weighted-average grant date fair value of RSUs granted was $63.16 per share for the nine months ended October 31, 2015 . The weighted-average grant date fair value of PSUs granted was $61.83 per share for the nine months ended October 31, 2015 . The weighted-average grant date fair value of RSAs granted was $69.00 per share for the nine months ended October 31, 2015 .

Geographic Information

Geographic Information	9 Months Ended
	Oct. 31, 2015
Segment Reporting [Abstract]
Geographic Information	Geographic Information Revenues Revenues by geography are based on the shipping address of the customer. The following table presents our revenues by geographic region for the periods presented (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2015 2014 2015 2014 United States $ 134,948 $ 91,190 $ 344,408 $ 231,895 International 39,472 24,839 104,003 71,588 Total revenues $ 174,420 $ 116,029 $ 448,411 $ 303,483 Other than the United States, no other individual country exceeded 10% of total revenues during any of the periods presented. One channel partner represented approximately 21% and 17% of total revenues during the three months ended October 31, 2015 and 2014 , respectively, and approximately 15% and 14% of total revenues during the nine months ended October 31, 2015 and 2014 , respectively. A second channel partner represented approximately 11% of total revenues during the three months ended October 31, 2015 . The revenues from these channel partners are comprised of a number of customer transactions, none of which were individually greater than 10% of total revenues for the three months or nine months ended October 31, 2015 and 2014 . At October 31, 2015 , one channel partner represented approximately 20% of total accounts receivable, a second channel partner represented approximately 17% of total accounts receivable and one customer represented approximately 10% of total accounts receivable. At January 31, 2015 , no customer or channel partner represented greater than 10% of total accounts receivable. Property and Equipment The following table presents our property and equipment by geographic region for the periods presented (in thousands): As of October 31, 2015 January 31, 2015 United States $ 95,979 $ 47,236 International 4,285 3,138 Total property and equipment, net $ 100,264 $ 50,374 Other than the United States, no other country represented 10% or more of our total property and equipment as of October 31, 2015 or January 31, 2015.

Income Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended October 31, 2015 and 2014 , we recorded $0.7 million and $0.4 million in income tax expense, respectively. For the nine months ended October 31, 2015 and 2014 , we recorded $8.8 million in income tax benefit and $1.5 million in income tax expense, respectively. The recorded tax benefit for the nine months ended October 2015 was due to the partial release of the deferred tax asset valuation allowance from the acquisition of Caspida, partially offset by an increase in taxable income in our international jurisdictions. The net deferred tax liability from the acquisition of Caspida provided an additional source of taxable income to support the realizability of the pre-existing deferred tax assets and as a result, we released a portion of the deferred tax asset valuation allowance. During the three months ended October 31, 2015 , there were no material changes to our unrecognized tax benefits, and we do not expect to have any significant changes to unrecognized tax benefits through the end of the fiscal year. Because of our history of tax losses, all years remain open to tax audit.

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Oct. 31, 2015
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted-average number of shares of common stock outstanding during the period, less the weighted-average unvested common stock subject to repurchase or forfeiture. Diluted net loss per share is computed by giving effect to all potential shares of common stock, including preferred stock, stock options, RSUs, PSUs and RSAs to the extent dilutive. The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share data): Three Months Ended October 31, Nine Months Ended October 31, 2015 2014 2015 2014 Numerator: Net loss $ (72,974 ) $ (48,551 ) $ (199,449 ) $ (160,088 ) Denominator: Weighted-average common shares outstanding 129,040 120,365 126,541 118,938 Less: Weighted-average unvested common shares subject to repurchase or forfeiture (672 ) (34 ) (7 ) (43 ) Weighted-average shares used to compute net loss per share, basic and diluted 128,368 120,331 126,534 118,895 Net loss per share, basic and diluted $ (0.57 ) $ (0.40 ) $ (1.58 ) $ (1.35 ) Since we were in a net loss position for all periods presented, basic net loss per share is the same as diluted net loss per share for all periods as the inclusion of all potential common shares outstanding would have been anti-dilutive. Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): As of October 31, 2015 2014 Shares subject to outstanding common stock options 4,031 7,501 Shares subject to outstanding RSUs, PSUs and RSAs 12,757 10,690 Employee stock purchase plan 328 368 Total 17,116 18,559

Related Party Transactions

Related Party Transactions	9 Months Ended
	Oct. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of our board of directors ("Board") serve on the board of directors of and/or are executive officers of, and, in some cases, are investors in, companies that are customers or vendors of ours. Certain of our executive officers also serve on the board of directors of companies that are customers or vendors of ours. We believe the transactions between these companies and us were carried out on terms that are consistent with similar transactions with our other similarly situated customers or vendors. We recognized revenues from sales to these companies of $1.2 million and $0.8 million for the three months ended October 31, 2015 and 2014 , respectively, and $3.7 million and $2.3 million for the nine months ended October 31, 2015 and 2014, respectively. We also recorded $0.5 million and $0.5 million in expenses related to purchases from these companies during the three months ended October 31, 2015 and 2014 , respectively, and $1.6 million and $1.4 million for the nine months ended October 31, 2015 and 2014, respectively. We had $ 0.1 million and $1.8 million of accounts receivable from these companies as of October 31, 2015 and January 31, 2015 , respectively. There were no accounts payable to these companies as of October 31, 2015 or January 31, 2015 .

Description of the Business a19

Description of the Business and Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2015
Accounting Policies [Abstract]
Fiscal Year	Fiscal Year Our fiscal year ends on January 31. References to fiscal 2016 or fiscal year 2016, for example, refer to the fiscal year ending January 31, 2016.
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”) and applicable rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet data as of January 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Annual Report on Form 10-K for the fiscal year ended January 31, 2015, filed with the SEC on March 31, 2015. There have been no changes in the significant accounting policies from those that were disclosed in the audited consolidated financial statements for the fiscal year ended January 31, 2015 included in the Annual Report on Form 10-K. In the opinion of management, the accompanying unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary to state 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 2016.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenues and expenses during the reporting periods covered by the financial statements and accompanying notes. In particular, we make estimates with respect to the fair value of multiple elements in revenue recognition, uncollectible accounts receivable, the assessment of the useful life and recoverability of long-lived assets (property and equipment, goodwill and identified intangibles), stock-based compensation expense, the fair value of assets acquired and liabilities assumed for business combinations, income taxes and contingencies. Actual results could differ from those estimates.
Segments	Segments We operate our business as one operating segment: the development and marketing of software products that enable our customers to gain real-time operational intelligence by harnessing the value of their data. Our chief operating decision maker is our Chief Executive Officer, who reviews financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources.
Principles of Consolidation	Principles of Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of Splunk Inc. and its direct and indirect wholly-owned subsidiaries. All intercompany balances and transactions have been eliminated upon consolidation.
Foreign Currency	Foreign Currency The functional currency of our foreign subsidiaries is the respective local currency. Translation adjustments arising from the use of differing exchange rates from period to period are included in Accumulated Other Comprehensive Loss within Stockholders' Equity. Foreign currency transaction gains and losses are included in Other income (expense), net and were not material for the three and nine months ended October 31, 2015 and 2014. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. All of our revenues are generated in U.S. dollars. Our expenses are generally denominated in the currencies in which our operations are located and are translated at the average exchange rate during the period. Equity related transactions are translated using historical exchange rates.
Foreign Currency Contracts	Foreign Currency Contracts In the first quarter of fiscal 2016, we began to use foreign currency forward contracts as a part of our strategy to manage exposure related to foreign currency denominated monetary assets and liabilities. These contracts typically have maturities of one month. They are not designated as cash flow or fair value hedges under ASC Topic 815, Derivatives and Hedging. These contracts hedge assets and liabilities that are denominated in foreign currencies and are carried at fair value as either assets or liabilities on the condensed consolidated balance sheets with changes in the fair value recorded to Other income (expense), net in the condensed consolidated statements of operations.
Investments	Investments We determine the appropriate classification of our investments at the time of purchase and reevaluate such determination at each balance sheet date. Securities are classified as available-for-sale and are carried at fair value, with the change in unrealized gains and losses, net of tax, reported as a separate component on the consolidated statements of comprehensive income (loss). Fair value is determined based on quoted market rates when observable or utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on securities available for sale are included as a component of investment income. In order to determine whether a decline in value is other-than-temporary, we evaluate, among other factors, the duration and extent to which the fair value has been less than the carrying value and our intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available-for-sale is included as a component of interest income.
Business Combinations	Business Combinations We use our best estimates and assumptions to allocate the fair value of purchase consideration to the tangible assets acquired, liabilities assumed and intangible assets acquired based on their estimated fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Our estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. We continue to collect information and reevaluate these estimates and assumptions quarterly and record any adjustments to our preliminary estimates to goodwill provided that we are within the measurement period. Upon the conclusion of the measurement period or final determination of the fair value of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our condensed consolidated statements of operations.

Investments and Fair Value Me20

Investments and Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2015
Investments, Debt And Equity Securities And Fair Value Disclosures [Abstract]
Schedule of fair value of financial assets and liabilities that were measured on a recurring basis	The following table sets forth the fair value of our financial assets and liabilities that were measured on a recurring basis as of October 31, 2015 and January 31, 2015 (in thousands): October 31, 2015 January 31, 2015 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds $ 503,560 $ — $ — $ 503,560 $ 374,682 $ — $ — $ 374,682 U.S. treasury securities — 446,840 — 446,840 — 627,931 — 627,931 Other — — 1,500 1,500 — — — — Reported as: Assets: Cash and cash equivalents $ 503,560 $ 374,682 Investments, current portion 446,840 462,849 Investments, non-current 1,500 165,082 Total $ 951,900 $ 1,002,613
Schedule of available-for-sale securities reconciliation	The following table represents our investments in U.S. treasury securities, which we have classified as available-for-sale investments as of October 31, 2015 (in thousands): October 31, 2015 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments, current portion: U.S. treasury securities $ 446,929 $ 28 $ (117 ) $ 446,840 Total available-for-sale investments in U.S. treasury securities $ 446,929 $ 28 $ (117 ) $ 446,840
Schedule of unrealized loss on investments	As of October 31, 2015 , the following marketable securities were in an unrealized loss position (in thousands): Less than 12 Months 12 Months or Greater Total Fair Value Unrealized Losses Fair Value Unrealized Losses Fair Value Unrealized Losses U.S. treasury securities $ 247,148 $ (109 ) $ 37,066 $ (8 ) $ 284,214 $ (117 )
Investments classified by contractual maturity date	The contractual maturities of our investments in U.S. treasury securities are as follows (in thousands): October 31, 2015 Due within one year $ 446,840 Total $ 446,840

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Oct. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	The following summarizes our contractual commitments and obligations as of October 31, 2015 (in thousands): Payments Due by Period* Total Less Than 1 1-3 years 3-5 years More Than 5 Office lease obligations $ 269,126 $ 17,793 $ 64,139 $ 60,730 $ 126,464 _________________________ *We entered into sublease agreements for portions of our office spaces in London and Virginia, and the future sublease rental income of $1.3 million has been included as an offset to our future minimum rental payments.

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Oct. 31, 2015
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and equipment consisted of the following (in thousands): As of October 31, 2015 January 31, 2015 Computer equipment and software $ 36,489 $ 28,342 Furniture and fixtures 10,506 7,707 Leasehold improvements (1) 23,361 10,146 Construction in progress (2) 62,479 29,360 132,835 75,555 Less: accumulated depreciation and amortization (32,571 ) (25,181 ) Property and equipment, net $ 100,264 $ 50,374

Acquisitions, Goodwill and In23

Acquisitions, Goodwill and Intangible Assets (Tables)	9 Months Ended
	Oct. 31, 2015
Business Combinations [Abstract]
Schedule of finite-lived intangible assets acquired as part of business combination	The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition (in thousands, except useful life): Fair Value Useful Life (months) Developed technology $ 44,300 72 In-process research and development 1,300 Indefinite* Customer relationships 190 36 Total intangible assets acquired $ 45,790 The following table sets forth the components of identifiable intangible assets acquired and their estimated useful lives as of the date of acquisition (in thousands, except useful life): Fair Value Useful Life (months) Developed technology $ 2,300 48 Other acquired intangible assets 370 36 Total intangible assets acquired $ 2,670
Schedule of pro forma information of business acquisitions	Accordingly, these unaudited pro forma results are presented for informational purpose only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the acquisition had occurred at the beginning of the period presented, nor are they indicative of future results of operations (in thousands, except per share amounts): Three Months Ended October 31, Nine Months 2015 2014 2015 2014 Revenues $ 174,420 $ 116,029 $ 448,411 $ 303,483 Net loss $ (72,953 ) $ (55,166 ) $ (222,515 ) $ (166,454 ) Basic and diluted net loss per share $ (0.57 ) $ (0.46 ) $ (1.76 ) $ (1.40 )
Schedule of goodwill	Goodwill balances are presented below (in thousands): Carrying amount Balance as of January 31, 2015 $ 19,070 Goodwill acquired 105,916 Foreign currency translation adjustments (680 ) Balance as of October 31, 2015 $ 124,306
Schedule of finite-lived intangible assets	Intangible assets subject to amortization obtained from acquisitions as of October 31, 2015 are as follows (in thousands, except useful life): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life (months) Developed technology $ 59,370 $ (9,113 ) $ 50,257 61 Customer relationships 1,810 (1,137 ) 673 16 Other acquired intangible assets 1,180 (717 ) 463 27 Total intangible assets subject to amortization $ 62,360 $ (10,967 ) $ 51,393
Schedule of expected future amortization for capitalized computer software costs developed for internal use	The expected future amortization expense for acquired intangible assets as of October 31, 2015 is as follows (in thousands): Fiscal Period: Remaining three months of fiscal 2016 $ 3,112 Fiscal 2017 11,921 Fiscal 2018 10,272 Fiscal 2019 8,014 Fiscal 2020 7,615 Fiscal 2021 7,383 Thereafter 3,076 Total amortization expense $ 51,393

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	9 Months Ended
	Oct. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share Based Compensation Stock Options and Restricted Stock Units Award Activity	The following table summarizes the stock option, restricted stock unit ("RSU") and performance unit ("PSU") award activity during the nine months ended October 31, 2015 : Options Outstanding RSUs and PSUs Outstanding Shares Available for Grant Shares Weighted- Average Exercise Price Per Share Weighted- Average Remaining Contractual Term Aggregate Intrinsic Value (1) Shares (in years) (in thousands) Balances as of January 31, 2015 6,718,878 6,536,855 $ 5.76 5.59 $ 301,532 12,480,368 Additional shares authorized 6,176,924 Options granted (86,753 ) 86,753 1.30 Options exercised (2,452,495 ) 5.18 Options forfeited and expired 139,851 (139,851 ) 32.53 RSUs and PSUs granted (3,399,028 ) 3,399,028 RSUs vested (2,690,456 ) RSUs forfeited and canceled 1,104,176 (1,104,176 ) Balances as of October 31, 2015 10,654,048 4,031,262 $ 5.09 4.60 $ 206,052 12,084,764 Vested and expected to vest 4,029,452 $ 5.09 4.59 $ 205,964 11,743,557 Exercisable as of October 31, 2015 3,565,104 $ 4.14 4.32 $ 185,567 _________________________ (1) The intrinsic value is calculated as the difference between the exercise price of the underlying stock option award and the closing market price of our common stock as of October 31, 2015 .

Geographic Information (Tables)

Geographic Information (Tables)	9 Months Ended
	Oct. 31, 2015
Segment Reporting [Abstract]
Schedule of revenues by geographic region	Revenues by geography are based on the shipping address of the customer. The following table presents our revenues by geographic region for the periods presented (in thousands): Three Months Ended October 31, Nine Months Ended October 31, 2015 2014 2015 2014 United States $ 134,948 $ 91,190 $ 344,408 $ 231,895 International 39,472 24,839 104,003 71,588 Total revenues $ 174,420 $ 116,029 $ 448,411 $ 303,483
Schedule of property and equipment	The following table presents our property and equipment by geographic region for the periods presented (in thousands): As of October 31, 2015 January 31, 2015 United States $ 95,979 $ 47,236 International 4,285 3,138 Total property and equipment, net $ 100,264 $ 50,374

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Oct. 31, 2015
Earnings Per Share [Abstract]
Schedule of computation of historical basic and diluted net loss per share	The following table sets forth the computation of historical basic and diluted net loss per share (in thousands, except per share data): Three Months Ended October 31, Nine Months Ended October 31, 2015 2014 2015 2014 Numerator: Net loss $ (72,974 ) $ (48,551 ) $ (199,449 ) $ (160,088 ) Denominator: Weighted-average common shares outstanding 129,040 120,365 126,541 118,938 Less: Weighted-average unvested common shares subject to repurchase or forfeiture (672 ) (34 ) (7 ) (43 ) Weighted-average shares used to compute net loss per share, basic and diluted 128,368 120,331 126,534 118,895 Net loss per share, basic and diluted $ (0.57 ) $ (0.40 ) $ (1.58 ) $ (1.35 )
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive	Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive were as follows (in thousands): As of October 31, 2015 2014 Shares subject to outstanding common stock options 4,031 7,501 Shares subject to outstanding RSUs, PSUs and RSAs 12,757 10,690 Employee stock purchase plan 328 368 Total 17,116 18,559

Description of the Business a27

Description of the Business and Significant Accounting Policies (Details) - segment	Jul. 09, 2015	Jun. 23, 2015	Oct. 31, 2015
Accounting Policies [Abstract]
Number of operating segments	1	1	1

Investments and Fair Value Me28

Investments and Fair Value Measurements (Details) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Fair Value Measurements
U.S. treasury securities	$ 446,840
Estimate of Fair Value Measurement | Recurring basis
Fair Value Measurements
Money market funds	503,560	$ 374,682
U.S. treasury securities	446,840	627,931
Other	1,500	0
Assets:
Cash and cash equivalents	503,560	374,682
Investments, current portion	446,840	462,849
Investments, non-current	1,500	165,082
Total	951,900	1,002,613
Estimate of Fair Value Measurement | Recurring basis | Level 1
Fair Value Measurements
Money market funds	503,560	374,682
U.S. treasury securities	0	0
Other	0	0
Estimate of Fair Value Measurement | Recurring basis | Level 2
Fair Value Measurements
Money market funds	0	0
U.S. treasury securities	446,840	627,931
Other	0	0
Estimate of Fair Value Measurement | Recurring basis | Level 3
Fair Value Measurements
Money market funds	0	0
U.S. treasury securities	0	0
Other	$ 1,500	$ 0

Investments and Fair Value Me29

Investments and Fair Value Measurements - Amortized Cost to Fair Value Reconciliation (Details) $ in Thousands	Oct. 31, 2015USD ($)
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Fair Value	$ 446,840
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Amortized Cost	446,929
U.S. treasury securities, Unrealized Gains	28
U.S. treasury securities, Unrealized Losses	(117)
U.S. treasury securities, Fair Value	446,840
US Treasury Securities | Investments, Current Portion
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Amortized Cost	446,929
U.S. treasury securities, Unrealized Gains	28
U.S. treasury securities, Unrealized Losses	(117)
U.S. treasury securities, Fair Value	$ 446,840

Investments and Fair Value Me30

Investments and Fair Value Measurements Fair Value Measurements - Securities in Unrealized Loss Position (Details) - US Treasury Securities $ in Thousands	Oct. 31, 2015USD ($)
Fair Value
Less than 12 Months	$ 247,148
12 Months or Greater	37,066
Total	284,214
Unrealized Losses
Less than 12 Months	(109)
12 Months or Greater	(8)
Total	$ (117)

Investments and Fair Value Me31

Investments and Fair Value Measurements - Contractual Maturities (Details) $ in Thousands	Oct. 31, 2015USD ($)
Investments, Debt And Equity Securities And Fair Value Disclosures [Abstract]
Due within one year	$ 446,840
Total	446,840
Convertible promissory note | Recurring basis | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale security	$ 1,500

Commitments and Contingencies32

Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Rent expense		$ 3,300	$ 2,600	$ 9,600	$ 7,500
Operating lease obligations, Total	[1]	269,126		269,126
Operating lease obligations, Less than 1 year	[1]	17,793		17,793
Operating lease obligations, 1-3 years	[1]	64,139		64,139
Operating lease obligations, 3-5 years	[1]	60,730		60,730
Operating lease obligations, More than 5 years	[1]	126,464		126,464
Future sublease rental income		$ 1,300		$ 1,300
[1]	We entered into sublease agreements for portions of our office spaces in London and Virginia, and the future sublease rental income of $1.3 million has been included as an offset to our future minimum rental payments.

Commitments and Contingencies -

Commitments and Contingencies - Office Lease (Details) $ in Thousands		Aug. 24, 2015USD ($)ft²	Oct. 31, 2015USD ($)ft²	May. 13, 2014USD ($)	Apr. 29, 2014ft²
Operating Leased Assets [Line Items]
Base rent obligation | $	[1]		$ 269,126
500 Santana Row, San Jose, CA
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²		235,000
Term of office lease		10 years 9 months
Base rent obligation | $		$ 120,500
270 Brannan Street, San Francisco, CA
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²					182,000
Term of office lease			84 months
Base rent obligation | $			$ 92,000
Amount to be Maintained in Letter of Credit as Security for Lease Agreement | $				$ 6,000
270 Brannan Street, San Francisco, CA | Lease Arrangement, To Be Obtained in 2016
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²			95,000
270 Brannan Street, San Francisco, CA | Lease Arrangement, To Be Obtained One Year After 2016
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²			87,000
[1]	We entered into sublease agreements for portions of our office spaces in London and Virginia, and the future sublease rental income of $1.3 million has been included as an offset to our future minimum rental payments.

Property and Equipment (Details

Property and Equipment (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
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense on Property and Equipment, net	$ 2,500	$ 2,000	$ 7,400	$ 5,700
Property and equipment, gross	132,835		132,835		$ 75,555
Less: accumulated depreciation and amortization	(32,571)		(32,571)		(25,181)
Property and equipment, net	100,264		100,264		50,374
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36,489		36,489		28,342
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	10,506		10,506		7,707
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	23,361		23,361		10,146
Leasehold improvements not in service
Property, Plant and Equipment [Line Items]
Property and equipment, gross	11,500		11,500		600
Construction in progress
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 62,479		$ 62,479		$ 29,360

Acquisitions, Goodwill and In35

Acquisitions, Goodwill and Intangible Assets (Details Textual) $ in Thousands	Jul. 09, 2015USD ($)segment	Jun. 23, 2015USD ($)segment	Oct. 31, 2015USD ($)	Oct. 31, 2014USD ($)	Oct. 31, 2015USD ($)companysegment	Oct. 31, 2014USD ($)	Jan. 31, 2015USD ($)
Business Acquisition [Line Items]
Goodwill			$ 124,306		$ 124,306		$ 19,070
Number of operating segments | segment	1	1			1
Number of businesses acquired | company					2
Amortization of intangible assets			$ 3,100	$ 1,400	$ 6,100	$ 3,200
Metafor Software
Business Acquisition [Line Items]
Percentage of voting interests acquired		100.00%
Purchase price paid in cash		$ 16,400
Identifiable intangible assets acquired		2,670
Net assets acquired		500
Net deferred tax assets acquired		100
Goodwill		$ 13,100
Caspida
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Purchase price paid in cash	$ 128,400
Identifiable intangible assets acquired	45,790
Net assets acquired	1,200
Net deferred tax liabilities assumed	11,400
Goodwill	92,800
Fair value of issued awards under merger agreement	61,600
In-process research and development | Caspida
Business Acquisition [Line Items]
Indefinite-lived intangible assets, acquired fair value	1,300
General and administrative | Caspida
Business Acquisition [Line Items]
Acquisition-related costs	$ 1,700

Acquisitions, Goodwill and In36

Acquisitions, Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	Jul. 09, 2015	Jun. 23, 2015	Oct. 31, 2015
Developed technology
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life			61 months
Customer relationships
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life			16 months
Other acquired intangible assets
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life			27 months
Metafor Software
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Finite-lived intangible assets, acquired fair value		$ 2,670
Intangible assets, acquired fair value		2,670
Metafor Software | Developed technology
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Finite-lived intangible assets, acquired fair value		$ 2,300
Useful Life		48 months
Metafor Software | Other acquired intangible assets
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Finite-lived intangible assets, acquired fair value		$ 370
Useful Life		36 months
Caspida
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Intangible assets, acquired fair value	$ 45,790
Caspida | Developed technology
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Finite-lived intangible assets, acquired fair value	$ 44,300
Useful Life	72 months
Caspida | Customer relationships
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Finite-lived intangible assets, acquired fair value	$ 190
Useful Life	36 months
Caspida | In-process research and development
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Indefinite-lived intangible assets, acquired fair value	$ 1,300

Acquisitions, Goodwill and In37

Acquisitions, Goodwill and Intangible Assets (Details 1) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Business Combinations [Abstract]
Revenues	$ 174,420	$ 116,029	$ 448,411	$ 303,483
Net loss	$ (72,953)	$ (55,166)	$ (222,515)	$ (166,454)
Basic and diluted net loss per share (in usd per share)	$ (0.57)	$ (0.46)	$ (1.76)	$ (1.40)

Acquisitions, Goodwill and In38

Acquisitions, Goodwill and Intangible Assets (Details 2) $ in Thousands	9 Months Ended
	Oct. 31, 2015USD ($)
Goodwill [Roll Forward]
Balance as of January 31, 2015	$ 19,070
Goodwill acquired	105,916
Foreign currency translation adjustments	(680)
Balance as of October 31, 2015	$ 124,306

Acquisitions, Goodwill and In39

Acquisitions, Goodwill and Intangible Assets (Details 3) $ in Thousands	9 Months Ended
	Oct. 31, 2015USD ($)
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 62,360
Accumulated Amortization	(10,967)
Total	51,393
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	59,370
Accumulated Amortization	(9,113)
Total	$ 50,257
Weighted Average Remaining Useful Life	61 months
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 1,810
Accumulated Amortization	(1,137)
Total	$ 673
Weighted Average Remaining Useful Life	16 months
Other acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 1,180
Accumulated Amortization	(717)
Total	$ 463
Weighted Average Remaining Useful Life	27 months

Acquisitions, Goodwill and In40

Acquisitions, Goodwill and Intangible Assets (Details 4) $ in Thousands	Oct. 31, 2015USD ($)
Business Combinations [Abstract]
Remaining three months of fiscal 2016	$ 3,112
Fiscal 2,017	11,921
Fiscal 2,018	10,272
Fiscal 2,019	8,014
Fiscal 2,020	7,615
Fiscal 2,021	7,383
Thereafter	3,076
Total	$ 51,393

Debt Financing Facilities (Deta

Debt Financing Facilities (Details) - Revolving line of credit facility - USD ($)	9 Months Ended
	Oct. 31, 2015	May. 09, 2013
Debt Financing Facilities
Maximum borrowing capacity		$ 25,000,000
Prime rate	3.25%
Amount outstanding	$ 0
London Interbank Offered Rate (LIBOR)
Debt Financing Facilities
Basis spread on variable rate	2.75%

Stock Compensation Plans (Detai

Stock Compensation Plans (Details)	9 Months Ended
	Oct. 31, 2015shares
Available for Grant
Balances at the beginning of the period (in shares)	6,718,878
Additional Shares Authorized (in shares)	6,176,924
Options granted (in shares)	(86,753)
Options exercised (in shares)
Options forfeited and expired (in shares)	139,851
Unregistered Restricted Shares granted (in shares)	3,399,028
RSUs forfeited (in shares)	1,104,176
Balances at the end of the period (in shares)	10,654,048

Stock Compensation Plans (Det43

Stock Compensation Plans (Details 2) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
		Oct. 31, 2015	Oct. 31, 2015	Jan. 31, 2015
Shares
Options granted (in shares)			86,753
Options exercised (in shares)
Options forfeited and expired (in shares)			(139,851)
Number of Shares
Unregistered Restricted Shares granted (in shares)			3,399,028
RSUs forfeited (in shares)			(1,104,176)
Options
Shares
Outstanding at the beginning of the period (in shares)			6,536,855
Options granted (in shares)			86,753
Options exercised (in shares)			(2,452,495)
Options forfeited and expired (in shares)			(139,851)
Outstanding at the end of the period (in shares)		4,031,262	4,031,262	6,536,855
Vested and expected to vest at the end of the period (in shares)		4,029,452	4,029,452
Exercisable at the end of the period (in shares)		3,565,104	3,565,104
Weighted-Average Exercise Price Per Share
Balances at the beginning of the period (in dollars per share)			$ 5.76
Options granted (in dollars per share)			1.30
Options exercised (in dollars per share)			5.18
Options forfeited (in dollars per share)			32.53
Balances at the end of the period (in dollars per share)		$ 5.09	5.09	$ 5.76
Vested and expected to vest at the end of the period (in dollars per share)		5.09	5.09
Exercisable at the end of the period (in dollars per share)		$ 4.14	$ 4.14
Weighted-Average Remaining Contractual Term
Balances at the end of the period			4 years 7 months 6 days	5 years 7 months 2 days
Vested and expected to vest at the end of the period			4 years 7 months 2 days
Vested and exercisable at the end of the period			4 years 3 months 26 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	[1]	$ 206,052	$ 206,052	$ 301,532
Vested and expected to vest at the end of the period (in dollars)	[1]	205,964	205,964
Vested and exercisable at the end of the period (in dollars)	[1]	185,567	185,567
Tax benefits
Tax benefits that have been realized from exercised stock options			1,000
Unrecognized compensation cost
Total unrecognized compensation cost related to stock options		$ 7,000	7,000
Weighted-average period over which unrecognized compensation cost is expected to be recognized		9 months 24 days
Additional disclosures
Total intrinsic value of options exercised (in dollars)			$ 147,900
RSUs and PSUs
Number of Shares
Balances at the beginning of the period (in shares)			12,480,368
Unregistered Restricted Shares granted (in shares)			3,399,028
RSUs vested (in shares)			(2,690,456)
RSUs forfeited (in shares)			(1,104,176)
Balances at the end of the period (in shares)		12,084,764	12,084,764	12,480,368
RSUs vested and expected to vest at the end of the period (in shares)		11,743,557	11,743,557
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized		2 years 8 months 12 days
Total unrecognized compensation cost		$ 566,900	$ 566,900
Additional disclosures
Weighted-average grant date fair value of awards granted (in dollars per share)			$ 63.16
PSUs
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized			3 years 4 months 24 days
Total unrecognized compensation cost		$ 13,300	$ 13,300
Additional disclosures
Weighted-average grant date fair value of awards granted (in dollars per share)			$ 61.83
Unregistered Restricted Shares
Number of Shares
Unregistered Restricted Shares granted (in shares)			671,782
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized		3 years 2 months 12 days
Total unrecognized compensation cost		$ 38,500	$ 38,500
Additional disclosures
Weighted-average grant date fair value of awards granted (in dollars per share)			$ 69
Minimum | PSUs
Tax benefits
Award vesting rights			0.00%
Maximum | PSUs
Tax benefits
Award vesting rights			200.00%
[1]	The intrinsic value is calculated as the difference between the exercise price of the underlying stock option award and the closing market price of our common stock as of October 31, 2015.

Geographic Information (Details

Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Revenues by geographic region
Revenue	$ 174,420	$ 116,029	$ 448,411	$ 303,483
United States
Revenues by geographic region
Revenue	134,948	91,190	344,408	231,895
International
Revenues by geographic region
Revenue	$ 39,472	$ 24,839	$ 104,003	$ 71,588

Geographic Information Narrativ

Geographic Information Narrative (Details) - customer	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Number of customers accounting for 10 percent or more of the concentration risk	3		3		0
Concentration risk, percentage					10.00%
Customer concentration risk | Revenues
Concentration Risk [Line Items]
Number of customers accounting for 10 percent or more of the concentration risk	2	1	2	1
Geographic concentration | Property and equipment | United States
Concentration Risk [Line Items]
Concentration risk, percentage			10.00%		10.00%
Customer One | Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage			20.00%
Customer One | Customer concentration risk | Revenues
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%
Customer Two | Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage			17.00%
Customer Two | Customer concentration risk | Revenues
Concentration Risk [Line Items]
Concentration risk, percentage	21.00%	17.00%	15.00%	14.00%
Customer Three | Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage			10.00%

Geographic Information (Detai46

Geographic Information (Details 2) - USD ($) $ in Thousands	Oct. 31, 2015	Jan. 31, 2015
Property and Equipment by Geographic Area
Property and equipment	$ 100,264	$ 50,374
United States
Property and Equipment by Geographic Area
Property and equipment	95,979	47,236
International
Property and Equipment by Geographic Area
Property and equipment	$ 4,285	$ 3,138

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014
Business Acquisition [Line Items]
Income tax provision	$ (735)	$ (447)	$ 8,758	$ (1,543)

Net Loss Per Share (Details)

Net Loss Per Share (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
Numerator
Net loss	$ (72,974)	$ (48,551)	$ (199,449)	$ (160,088)
Denominator:
Weighted-average common shares outstanding (in shares)	129,040	120,365	126,541	118,938
Less: Weighted-average unvested common shares subject to repurchase or forfeiture (in shares)	(672)	(34)	(7)	(43)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	128,368	120,331	126,534	118,895
Net loss per share
Net loss per share, basic and diluted (in dollars per share)	$ (0.57)	$ (0.40)	$ (1.58)	$ (1.35)

Net Loss Per Share (Details 2)

Net Loss Per Share (Details 2) - shares shares in Thousands	9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014
Potentially dilutive securities
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	17,116	18,559
Shares subject to outstanding common stock options
Potentially dilutive securities
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	4,031	7,501
Shares subject to outstanding RSUs, PSUs and RSAs
Potentially dilutive securities
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	12,757	10,690
Employee stock purchase plan
Potentially dilutive securities
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	328	368

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Related Party Transactions [Abstract]
Revenue from sales to the related party	$ 1,200,000	$ 800,000	$ 3,700,000	$ 2,300,000
Expenses related to purchases from the related party	500,000	$ 500,000	1,600,000	$ 1,400,000
Accounts receivable from the related party	100,000		100,000		$ 1,800,000
Accounts payable to related parties	$ 0		$ 0		$ 0