Splunk (SPLK) 10-Q 6 Sep 17 2018 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jul. 31, 2017	Aug. 30, 2017
Document and Entity Information
Entity Registrant Name	SPLUNK INC
Entity Central Index Key	1,353,283
Document Type	10-Q
Document Period End Date	Jul. 31, 2017
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		139,990,162
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 31, 2017	Jan. 31, 2017
Current assets:
Cash and cash equivalents	$ 419,810	$ 421,346
Investments, current portion	663,737	662,096
Accounts receivable, net	208,082	238,281
Prepaid expenses and other current assets	49,412	38,650
Total current assets	1,341,041	1,360,373
Investments, non-current	5,000	5,000
Property and equipment, net	161,954	166,395
Intangible assets, net	34,577	37,713
Goodwill	138,681	124,642
Other assets	22,901	24,423
Total assets	1,704,154	1,718,546
Current liabilities:
Accounts payable	8,984	7,503
Accrued payroll and compensation	93,843	100,092
Accrued expenses and other liabilities	84,002	81,071
Deferred revenue, current portion	482,196	478,707
Total current liabilities	669,025	667,373
Deferred revenue, non-current	167,004	146,752
Other liabilities, non-current	100,163	99,260
Total non-current liabilities	267,167	246,012
Total liabilities	936,192	913,385
Commitments and contingencies (Note 3)
Stockholders' equity:
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 139,880,265 shares issued and outstanding at July 31, 2017, and 137,169,481 shares issued and outstanding at January 31, 2017	140	137
Accumulated other comprehensive loss	(1,349)	(3,013)
Additional paid-in capital	1,973,386	1,828,821
Accumulated deficit	(1,204,215)	(1,020,784)
Total stockholders' equity	767,962	805,161
Total liabilities and stockholders' equity	$ 1,704,154	$ 1,718,546

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jul. 31, 2017	Jan. 31, 2017
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	139,880,265	137,169,481
Common stock, shares outstanding	139,880,265	137,169,481

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Revenues
License		$ 142,851	$ 115,695	$ 259,577	$ 216,687
Maintenance and services		137,113	97,058	262,835	182,018
Total revenues		279,964	212,753	522,412	398,705
Cost of revenues
License	[1]	3,159	2,868	6,087	5,830
Maintenance and services	[1]	56,717	41,748	111,952	78,286
Total cost of revenues	[1]	59,876	44,616	118,039	84,116
Gross profit		220,088	168,137	404,373	314,589
Operating expenses
Research and development	[1]	71,774	67,224	143,072	134,595
Sales and marketing	[1]	191,284	150,228	365,232	295,379
General and administrative	[1]	39,139	34,312	75,635	66,385
Total operating expenses	[1]	302,197	251,764	583,939	496,359
Operating loss		(82,109)	(83,627)	(179,566)	(181,770)
Interest and other income (expense), net
Interest income (expense), net		(164)	(797)	(692)	(1,200)
Other income (expense), net		(874)	(1,063)	(1,482)	(2,188)
Total interest and other income (expense), net		(1,038)	(1,860)	(2,174)	(3,388)
Loss before income taxes		(83,147)	(85,487)	(181,740)	(185,158)
Income tax provision		353	1,110	1,691	2,335
Net loss		$ (83,500)	$ (86,597)	$ (183,431)	$ (187,493)
Net loss per share:
Basic and diluted (in dollars per share)		$ (0.60)	$ (0.65)	$ (1.33)	$ (1.42)
Weighted-average shares outstanding:
Basic and diluted (in shares)		139,063	133,041	138,436	132,310
Stock-based compensation				$ 182,422	$ 180,233
[1]	Amounts include stock-based compensation expense, as follows: Cost of revenues, $8,410 thousand, $7,310 thousand, $16,602 thousand and $14,865 thousand; Research and development, $25,991 thousand, $27,742 thousand, 52,788 thousand and 56,948 thousand; Sales and marketing, $42,652 thousand, $39,371 thousand, 83,295 thousand and 79,604 thousand; General and administrative, $15,314 thousand, $14,440 thousand, 29,737 thousand and 28,816 thousand for the three and six months ended July 31, 2017 and 2016, respectively.

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Stock-based compensation			$ 182,422	$ 180,233
Cost of revenues
Stock-based compensation	$ 8,410	$ 7,310	16,602	14,865
Research and development
Stock-based compensation	25,991	27,742	52,788	56,948
Sales and marketing
Stock-based compensation	42,652	39,371	83,295	79,604
General and administrative
Stock-based compensation	$ 15,314	$ 14,440	$ 29,737	$ 28,816

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Net loss	$ (83,500)	$ (86,597)	$ (183,431)	$ (187,493)
Other comprehensive gain (loss):
Net unrealized gain (loss) on investments	33	17	(449)	356
Foreign currency translation adjustments	2,207	(558)	2,113	1,640
Total other comprehensive gain (loss)	2,240	(541)	1,664	1,996
Comprehensive loss	$ (81,260)	$ (87,138)	$ (181,767)	$ (185,497)

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Cash flows from operating activities
Net loss	$ (183,431)	$ (187,493)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	19,916	14,635
Amortization of investment premiums	342	447
Stock-based compensation	182,422	180,233
Deferred income taxes	(866)	(698)
Excess tax benefit from employee stock plans	0	(1,027)
Changes in operating assets and liabilities, net of acquisitions
Accounts receivable, net	30,199	50,403
Prepaid expenses, other current and non-current assets	(7,883)	(3,177)
Accounts payable	1,963	265
Accrued payroll and compensation	(6,264)	(30,985)
Accrued expenses and other liabilities	4,407	13,579
Deferred revenue	23,741	17,856
Net cash provided by operating activities	64,546	54,038
Cash flows from investing activities
Purchases of investments	(340,697)	(316,528)
Maturities of investments	338,265	290,275
Acquisition, net of cash acquired	(17,223)	0
Purchases of property and equipment	(8,513)	(14,250)
Other investment activities	0	(3,500)
Net cash used in investing activities	(28,168)	(44,003)
Cash flows from financing activities
Proceeds from exercise of stock options	1,973	5,603
Excess tax benefit from employee stock plans	0	1,027
Taxes paid related to net share settlement of equity awards	(59,109)	(46,822)
Repayment of financing lease obligation	(802)	0
Proceeds from employee stock purchase plans	19,282	15,183
Net cash used in financing activities	(38,656)	(25,009)
Effect of exchange rate changes on cash and cash equivalents	742	382
Net decrease in cash and cash equivalents	(1,536)	(14,592)
Cash and cash equivalents
Beginning of period	421,346	424,541
End of period	419,810	409,949
Supplemental disclosures
Cash paid for income taxes	3,883	1,726
Cash paid for interest expense related to build-to-suit lease	3,974	1,920
Non-cash investing and financing activities
Increase (decrease) in accrued purchases of property and equipment	26	1,016
Increase in capitalized construction costs related to build-to-suit lease	$ 0	$ 10,065

Description of the Business and

Description of the Business and Significant Accounting Policies	6 Months Ended
	Jul. 31, 2017
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 solutions that enable organizations to gain real-time operational intelligence by harnessing the value of their data. Our offerings enable users to collect, index, search, explore, monitor, correlate and analyze data regardless of format or source. Our offerings address large and diverse data sets, commonly referred to as big data, and are specifically tailored for machine 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 offerings 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 2018 or fiscal year 2018, for example, refer to the fiscal year ending January 31, 2018. 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, 2017 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, 2017 , filed with the SEC on March 29, 2017 . 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, 2017 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 2018. 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, leases and contingencies. Actual results could differ from those estimates. Segments We operate our business as one operating segment: the development and marketing of software solutions 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. Strategic Investments We hold certain non-marketable equity securities which are accounted for using the cost method of accounting. These investments are recorded at cost in "Investments, non-current" on our condensed consolidated balance sheets and are adjusted only for other-than-temporary impairments and additional investments. Recently Adopted Accounting Standards In March 2016, the Financial Accounting Standards Board (“FASB”) issued ASU No. 2016-09 (Topic 718), Compensation - Stock Compensation, which has been issued as part of its Simplification Initiative. The new guidance requires companies to recognize stock-based compensation excess tax benefits, net of detriments (if any) to the condensed consolidated statements of operations, as opposed to additional paid-in capital within equity, when the awards vest or are exercised. Additionally, net excess tax benefit cash flows resulting from share-based payments are required to be reported as operating activities in the statement of cash flows. These updates are to be adopted either prospectively or retrospectively. The new guidance also allows companies to make a policy election to account for forfeitures as they occur, which, if elected, must be adopted using a modified retrospective approach with a cumulative effect adjustment recorded to opening retained earnings. The ASU is effective for public companies for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. We adopted this guidance during the first quarter of fiscal year 2018. Excess tax benefits on stock plans have been recorded to the condensed consolidated statements of operations rather than to additional paid-in capital within equity on a prospective basis. At April 30, 2017, we recorded $301.6 million of previously unrecognized excess tax benefits, which are fully offset by the related valuation allowance. We did not record an adjustment to our accumulated deficit as a result of adopting ASC 2016-09. We also elected to prospectively apply the change in presentation requirement wherein income tax effects of awards are classified as operating activities in the condensed consolidated statement of cash flows. Prior period classification of cash flows related to excess tax benefits have not been adjusted. We did not elect an accounting policy change to record forfeitures as they occur and we will continue to estimate forfeitures at each period. Recently Issued Accounting Pronouncements In May 2017, the FASB issued ASU No. 2017-09 (Topic 718), Scope of Modification Accounting. The new standard clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The standard is effective for our first quarter of fiscal 2019, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04 (Topic 350) Intangibles - Goodwill and Other. The new standard simplifies how companies are required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The standard is effective for our first quarter of fiscal 2021, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-01 (Topic 805) Business Combinations - Clarifying the Definition of a Business. The new standard narrows the definition of a business to assist companies with evaluating when a set of transferred assets and activities is a business. The standard is effective for our first quarter of fiscal 2019. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In October 2016, the FASB issued ASU No. 2016-16 (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory. The new standard will require companies to recognize, as opposed to defer, the tax effects from intercompany transfers of certain assets when the transfer occurs. The standard is effective for our first quarter of fiscal 2019. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13 (Topic 326), Financial Instruments - Credit Losses. The amendments in this update require a financial asset (or a group of financial assets) measured at an amortized cost basis to be presented at the net amount expected to be collected. The new approach to estimating credit losses (referred to as the current expected credit losses model) applies to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans and held-to-maturity debt securities. The standard is effective for our first quarter of fiscal 2021, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842), Leases, which supersedes the lease recognition requirements in ASC Topic 840, Leases. The standard requires an entity to recognize right-of-use assets and lease liabilities arising from a lease for operating leases, initially measured at the present value of the lease payments on the condensed consolidated balance sheets. The impact of such leases on the condensed consolidated statements of operations and cash flows will continue to be treated in a similar manner under current GAAP. The standard also requires additional qualitative and quantitative disclosures. The standard is effective for our first quarter of fiscal 2020, although early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements and related disclosures. We anticipate that most of our office leases will be recognized as lease liabilities and corresponding right-of-use assets, and will accordingly have a material impact on our condensed consolidated balance sheets upon adoption. In May 2014, the FASB issued ASU No. 2014-09 (Topic 606), Revenue from Contracts with Customers, which supersedes the revenue recognition requirements in Accounting Standards Codification 605, Revenue Recognition and establishes a new revenue standard. 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 March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations, which clarifies the guidance in the new revenue standard on assessing whether an entity is a principal or an agent in a revenue transaction. This conclusion impacts whether an entity reports revenue on a gross or net basis. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing, which clarifies the guidance in the new revenue standard regarding an entity’s identification of its performance obligations in a contract. In May 2016, the FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, which amends the guidance in the new revenue standard on collectability, non-cash consideration, presentation of sales tax, and transition. In December 2016, the FASB issued ASU No. 2016-20, Technical Corrections and Improvements to Topic 606, which clarifies narrow aspects of ASC 606 or corrects unintended application of the guidance. The new revenue standard, as amended by ASU No. 2015-14, is effective in the first quarter of fiscal 2019 and may be applied retrospectively to each prior period presented or with the cumulative effect recognized as of the date of initial application. We currently plan to adopt the standard using the cumulative effect transition method. We are still evaluating the total impact of the new revenue standard on our condensed consolidated financial statements, accounting policies, systems and processes. We have allocated internal and external resources to assist in our implementation and evaluation of the new standard. We have also made investments in systems to assist in financial reporting under the new standard. While we cannot reasonably estimate the expected financial statement impact at this time, we believe the adoption of this new standard will have a material impact on our condensed consolidated financial statements, including the way we account for arrangements involving a term license, deferred revenue and sales commissions. Under the new revenue standard, we would be required to recognize term license revenues upfront and the associated maintenance revenues over the contract period. Under the current revenue standard, we recognize both the term license and maintenance revenues ratably over the contract period. In addition, some deferred revenue recorded in accordance with the current revenue standard will never be recognized as revenue upon adoption of the new revenue standard and instead will be part of the cumulative effect adjustment within accumulated deficit. We have also considered the impact of the guidance in ASC 340-40, Other Assets and Deferred Costs; Contracts with Customers, under Topic 606. Under ASC 340-40, we would be required to capitalize and amortize incremental costs of obtaining a contract, such as sales commission costs. Under our current accounting policy, we do not capitalize sales commission costs but rather recognize these costs when they are incurred.

Investments and Fair Value Meas

Investments and Fair Value Measurements	6 Months Ended
	Jul. 31, 2017
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 July 31, 2017 and January 31, 2017 (in thousands): July 31, 2017 January 31, 2017 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds $ 390,400 $ — $ — $ 390,400 $ 345,959 $ — $ — $ 345,959 U.S. treasury securities — 663,737 — 663,737 — 662,096 — 662,096 Other — — — — — — 3,000 3,000 Reported as: Assets: Cash and cash equivalents $ 390,400 $ 345,959 Investments, current portion 663,737 662,096 Investments, non-current — 3,000 Total $ 1,054,137 $ 1,011,055 Our investments in money market funds are measured at fair value on a recurring basis. These money market funds are actively traded and reported daily through a variety of sources. The fair value of the money market fund investments is classified as Level 1. The following table represents our investments in U.S. treasury securities, which we have classified as available-for-sale investments as of July 31, 2017 (in thousands): July 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments, current portion: U.S. treasury securities $ 664,417 $ — $ (680 ) $ 663,737 Total available-for-sale investments in U.S. treasury securities $ 664,417 $ — $ (680 ) $ 663,737 As of July 31, 2017 , 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 $ 663,737 $ (680 ) $ — $ — $ 663,737 $ (680 ) As of July 31, 2017 , we did not consider any of our investments to be other-than-temporarily impaired. The contractual maturities of our investments are as follows (in thousands): July 31, 2017 Due within one year $ 663,737 Total $ 663,737 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. Strategic Investments We hold strategic investments in the form of non-marketable equity securities which are recorded at cost. During the first quarter of fiscal 2018, $3.0 million of our investments in the form of convertible promissory notes in a privately-held company were automatically converted into preferred stock. As a result, these non-marketable equity securities are no longer classified as Level 3 investments measured at fair value and are now accounted for as cost method investments. As of July 31, 2017 , our cost method investments totaled $5.0 million .

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jul. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Lease Commitments We lease our office spaces under non-cancelable leases. Rent expense for our operating leases was $5.5 million and $3.5 million for the three months ended July 31, 2017 and 2016 , respectively, and $10.8 million and $6.8 million for the six months ended July 31, 2017 and 2016 , respectively. On August 24, 2015, we entered into an office lease for approximately 235,000 square feet located at 3098 Olsen Drive, San Jose, California for a term of 129 months. Rent expense for this lease commenced in the third quarter of fiscal 2017. Our total obligation for the base rent is approximately $120.5 million . The following summarizes our operating lease commitments as of July 31, 2017 (in thousands): Payments Due by Period Total Less Than 1 1-3 years 3-5 years More Than 5 Operating lease commitments (1) $ 167,265 $ 22,899 $ 41,091 $ 35,848 $ 67,427 _________________________ (1) We entered into sublease agreements for portions of our office space and the future rental income of $5.7 million from these agreements has been included as an offset to our future minimum rental payments. Financing Lease Obligation 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 is allocated between the "Initial Premises" and "Additional Premises," which are each approximately 91,000 square feet of rentable space. The term of the Additional Premises begins one year after the Initial Premises, which began in August 2015, 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 had certain indemnification obligations related to the construction, we were considered, for accounting purposes only, the owner of the construction project under build-to-suit lease accounting. We have recorded 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 moved into the Premises in February 2016. We have determined that the lease does not meet the criteria for “sale-leaseback” treatment, due to our continuing involvement in the construction project resulting from our standby letter of credit. Accordingly, the Lease will continue to be accounted for as a financing obligation. As of July 31, 2017 , future payments on the financing lease obligation are as follows (in thousands): Fiscal Period: Remaining six months of fiscal 2018 $ 6,105 Fiscal 2019 12,552 Fiscal 2020 12,928 Fiscal 2021 13,316 Fiscal 2022 13,715 Fiscal 2023 14,127 Fiscal 2024 8,142 Total future minimum lease payments $ 80,885 Facility Exit Costs In fiscal 2017, we relocated certain of our corporate offices in the San Francisco Bay Area and as a result, a portion of our leased office spaces are no longer in use. Accordingly, we calculated and recorded a liability at the "cease-use" date related to those operating leases based on the difference between the present value of the estimated future sublease rental income and the present value of our remaining lease obligations, adjusted for the effects of any prepaid or deferred items. We recorded a facility exit charge of approximately $8.6 million to "General and administrative" expenses in the condensed consolidated statements of operations associated with the recognition of the liability. The short-term portion of the liability is recorded in "Accrued expenses and other liabilities" and the long-term portion of the liability is recorded in "Other liabilities, non-current," on the condensed consolidated balance sheets. As of July 31, 2017 , the remaining "cease-use" liability was $6.7 million . 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 condensed 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 offerings, 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 July 31, 2017 . We are unable to estimate the maximum potential impact of these indemnifications on our future results of operations.

Property and Equipment

Property and Equipment	6 Months Ended
	Jul. 31, 2017
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 July 31, 2017 January 31, 2017 Computer equipment and software $ 66,822 $ 59,396 Furniture and fixtures 16,555 16,194 Leasehold and building improvements 59,440 58,569 Building (1) 82,250 82,250 225,067 216,409 Less: accumulated depreciation and amortization (63,113 ) (50,014 ) Property and equipment, net $ 161,954 $ 166,395 _________________________ (1) This relates to the capitalization of construction costs in connection with our financing lease obligation, where we are considered the owner of the asset, 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 $6.6 million and $5.1 million for the three months ended July 31, 2017 and 2016 , respectively, and $13.0 million and $8.4 million for the six months ended July 31, 2017 and 2016 , respectively.

Acquisitions, Goodwill and Inta

Acquisitions, Goodwill and Intangible Assets	6 Months Ended
	Jul. 31, 2017
Business Combinations [Abstract]
Acquisition, Goodwill and Intangible Assets	Acquisition, Goodwill and Intangible Assets Acquisition On May 15, 2017, we acquired 100% of the voting equity interest of a privately-held Delaware corporation, which develops technology for search-driven analytics on enterprise data. This acquisition has been accounted for as a business combination. The purchase price of $17.3 million , paid in cash, was preliminarily allocated as follows: $3.8 million to identifiable intangible assets and $0.5 million to net deferred tax liability, with the excess $14.0 million of the purchase price over the fair value of net assets acquired recorded as goodwill. Goodwill is primarily attributable to the value expected from the synergies of the combination, including developing a more intuitive search experience for our products. This goodwill is not deductible for income tax purposes. The results of operations of the acquired entity, which are not material, have been included in our condensed consolidated financial statements from the date of purchase. Pro forma and historical results of operations of the acquired entity 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 $ 3,500 48 Other acquired intangible assets 300 24 Total intangible assets acquired $ 3,800 Goodwill As of July 31, 2017, we had goodwill of $138.7 million . There were no impairments to goodwill during the three or six months ended July 31, 2017 or during prior periods. Goodwill balances are presented below (in thousands): Carrying amount Balance as of January 31, 2017 $ 124,642 Goodwill acquired 14,039 Balance as of July 31, 2017 $ 138,681 Intangible Assets Intangible assets subject to amortization realized from acquisitions as of July 31, 2017 are as follows (in thousands, except useful life): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life (months) Developed technology $ 62,870 $ (28,742 ) $ 34,128 45 Customer relationships 1,810 (1,752 ) 58 11 Other acquired intangible assets 1,480 (1,089 ) 391 27 Total intangible assets subject to amortization $ 66,160 $ (31,583 ) $ 34,577 Amortization expense from acquired intangible assets was $ 4.2 million and $3.1 million for the three months ended July 31, 2017 and 2016 , respectively, and $6.9 million and $6.2 million for the six months ended July 31, 2017 and 2016 , respectively. The expected future amortization expense for acquired intangible assets as of July 31, 2017 is as follows (in thousands): Fiscal Period: Remaining six months of fiscal 2018 $ 5,383 Fiscal 2019 9,016 Fiscal 2020 8,600 Fiscal 2021 8,283 Fiscal 2022 3,295 Total amortization expense $ 34,577

Debt Financing Facilities

Debt Financing Facilities	6 Months Ended
	Jul. 31, 2017
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 2017. As amended, the agreement provides for a revolving line of credit facility, which expires May 9, 2018. 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 ( 4.25% in July 2017) or the LIBOR rate plus 2.75% . As of July 31, 2017 , 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 July 31, 2017 .

Stock Compensation Plans

Stock Compensation Plans	6 Months Ended
	Jul. 31, 2017
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 six months ended July 31, 2017 : 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, 2017 10,401,789 2,057,894 $ 4.67 3.28 $ 109,571 13,924,414 Additional shares authorized 6,858,474 Options exercised (569,089 ) 3.46 Options forfeited and expired 6,172 (6,172 ) 50.38 RSUs and PSUs granted (1,862,988 ) 1,862,988 RSUs and PSUs vested (2,725,292 ) Shares withheld related to net share settlement of RSUs and PSUs 993,508 RSUs and PSUs forfeited and canceled 1,005,466 (1,005,466 ) Balances as of July 31, 2017 17,402,421 1,482,633 $ 4.94 2.85 $ 81,650 12,056,644 Vested and expected to vest 1,482,577 $ 4.94 2.85 $ 81,646 11,712,148 Exercisable as of July 31, 2017 1,459,282 $ 5.00 2.78 $ 80,279 _________________________ (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 July 31, 2017 . Under net settlement procedures applicable to our outstanding RSUs for current employees, upon each settlement date, RSUs are withheld to cover the required withholding tax, which is based on the value of the RSU on the settlement date as determined by the closing price of our common stock on the trading day of the applicable settlement date. These shares withheld by us as a result of the net settlement of RSUs are not considered issued and outstanding, thereby reducing our shares outstanding used to calculate earnings per share. These shares are returned to the reserves and are available for future issuance under our 2012 Equity Incentive Plan. Beginning in 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. At July 31, 2017 , total unrecognized compensation cost related to stock options was $1.3 million , adjusted for estimated forfeitures, which is expected to be recognized over a weighted-average period of 1.1 years . At July 31, 2017 , total unrecognized compensation cost was $507.7 million related to RSUs, adjusted for estimated forfeitures, which is expected to be recognized over the next 2.6 years . At July 31, 2017 , total unrecognized compensation cost was $31.3 million related to PSUs, adjusted for estimated forfeitures, which is expected to be recognized over the next 2.9 years . Additionally, during fiscal 2016, we issued 671,782 restricted shares of our common stock (“RSAs”) and at July 31, 2017 , total unrecognized compensation cost was $4.0 million related to RSAs, adjusted for estimated forfeitures, which is expected to be recognized over the next 1.4 years . At July 31, 2017 , 414,943 RSAs were vested, 186,003 RSAs were forfeited and canceled and 70,836 RSAs were outstanding. The total intrinsic value of options exercised during the six months ended July 31, 2017 was $32.8 million . The weighted-average grant date fair value of RSUs granted was $61.05 per share for the six months ended July 31, 2017 . The weighted-average grant date fair value of PSUs granted was $60.25 per share for the six months ended July 31, 2017 . The weighted-average grant date fair value of RSAs granted was $69.00 per share during fiscal 2016. No RSAs were granted during the six months ended July 31, 2017 .

Geographic Information

Geographic Information	6 Months Ended
	Jul. 31, 2017
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 July 31, Six Months Ended July 31, 2017 2016 2017 2016 United States $ 213,040 $ 165,073 $ 395,252 $ 302,878 International 66,924 47,680 127,160 95,827 Total revenues $ 279,964 $ 212,753 $ 522,412 $ 398,705 Other than the United States, no other individual country exceeded 10% of total revenues during any of the periods presented. One channel partner represented 28% and 25% of total revenues during the three months ended July 31, 2017 and 2016 , respectively, and approximately 28% and 24% of total revenues during the six months ended July 31, 2017 and 2016 , respectively. A second channel partner represented approximately 19% and 17% of total revenues during the three months ended July 31, 2017 and 2016 , respectively, and approximately 18% and 16% of total revenues during the six months ended July 31, 2017 and 2016 , respectively. 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 six months ended July 31, 2017 or 2016 . At July 31, 2017 , one channel partner represented 31% and a second channel partner represented 14% of total accounts receivable. At January 31, 2017 , one channel partner represented 30% of total accounts receivable. Property and Equipment The following table presents our property and equipment, net of depreciation, by geographic region for the periods presented (in thousands): As of July 31, 2017 January 31, 2017 United States $ 155,372 $ 159,428 International 6,582 6,967 Total property and equipment, net $ 161,954 $ 166,395 Other than the United States, no other country represented 10% or more of our total property and equipment as of July 31, 2017 or January 31, 2017 .

Income Taxes

Income Taxes	6 Months Ended
	Jul. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes For the three months ended July 31, 2017 and 2016 , we recorded $0.4 million and $1.1 million in income tax expense, respectively. For the six months ended July 31, 2017 and 2016 , we recorded $1.7 million and $2.3 million in income tax expense, respectively. The decrease in income tax expense for the three and six months ended July 31, 2017 was primarily due to the partial release of the valuation allowance as a result of an acquisition. During the six months ended July 31, 2017 , 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	6 Months Ended
	Jul. 31, 2017
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 July 31, Six Months Ended July 31, 2017 2016 2017 2016 Numerator: Net loss $ (83,500 ) $ (86,597 ) $ (183,431 ) $ (187,493 ) Denominator: Weighted-average common shares outstanding 139,135 133,624 138,509 132,873 Less: Weighted-average unvested common shares subject to repurchase or forfeiture (72 ) (583 ) (73 ) (563 ) Weighted-average shares used to compute net loss per share, basic and diluted 139,063 133,041 138,436 132,310 Net loss per share, basic and diluted $ (0.60 ) $ (0.65 ) $ (1.33 ) $ (1.42 ) 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 potentially dilutive securities 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 July 31, 2017 2016 Shares subject to outstanding common stock options 1,483 2,709 Shares subject to outstanding RSUs, PSUs and RSAs 12,127 14,386 Employee stock purchase plan 344 323 Total 13,954 17,418

Related Party Transactions

Related Party Transactions	6 Months Ended
	Jul. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Certain members of our board of directors 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. All contracts with related parties are executed in the ordinary course of business. We recognized revenues from sales to these companies of $3.3 million and $1.2 million for the three months ended July 31, 2017 and 2016 , respectively, and $6.1 million and $2.4 million for the six months ended July 31, 2017 and 2016 , respectively. We recorded $0.3 million and $0.1 million in expenses related to purchases from these companies during the three months ended July 31, 2017 and 2016 , respectively, and $0.5 million and $0.2 million for the six months ended July 31, 2017 and 2016 , respectively. We had $1.4 million and $1.9 million of accounts receivable from these companies as of July 31, 2017 and January 31, 2017 , respectively. There were no accounts payable to these companies as of July 31, 2017 or January 31, 2017 .

Description of the Business a19

Description of the Business and Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 31, 2017
Accounting Policies [Abstract]
Business Description and Basis of Presentation	Business Splunk Inc. (“we,” “us,” “our”) provides innovative software solutions that enable organizations to gain real-time operational intelligence by harnessing the value of their data. Our offerings enable users to collect, index, search, explore, monitor, correlate and analyze data regardless of format or source. Our offerings address large and diverse data sets, commonly referred to as big data, and are specifically tailored for machine 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 offerings 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	Fiscal Year Our fiscal year ends on January 31. References to fiscal 2018 or fiscal year 2018, for example, refer to the fiscal year ending January 31, 2018.
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, 2017 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, 2017 , filed with the SEC on March 29, 2017 . 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, 2017 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 2018.
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, leases 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 solutions 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.
Cost Method Investments, Policy	Strategic Investments We hold certain non-marketable equity securities which are accounted for using the cost method of accounting. These investments are recorded at cost in "Investments, non-current" on our condensed consolidated balance sheets and are adjusted only for other-than-temporary impairments and additional investments.
New Accounting Pronouncements, Policy	Recently Issued Accounting Pronouncements In May 2017, the FASB issued ASU No. 2017-09 (Topic 718), Scope of Modification Accounting. The new standard clarifies when changes to the terms or conditions of a share-based payment award must be accounted for as modifications. The standard is effective for our first quarter of fiscal 2019, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04 (Topic 350) Intangibles - Goodwill and Other. The new standard simplifies how companies are required to test goodwill for impairment by eliminating Step 2 from the goodwill impairment test. Step 2 measures a goodwill impairment loss by comparing the implied fair value of a reporting unit's goodwill with the carrying amount of that goodwill. Instead, if the carrying amount of a reporting unit exceeds its fair value, an impairment loss shall be recognized in an amount equal to that excess, limited to the total amount of goodwill allocated to that reporting unit. The standard is effective for our first quarter of fiscal 2021, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-01 (Topic 805) Business Combinations - Clarifying the Definition of a Business. The new standard narrows the definition of a business to assist companies with evaluating when a set of transferred assets and activities is a business. The standard is effective for our first quarter of fiscal 2019. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In October 2016, the FASB issued ASU No. 2016-16 (Topic 740), Intra-Entity Transfers of Assets Other Than Inventory. The new standard will require companies to recognize, as opposed to defer, the tax effects from intercompany transfers of certain assets when the transfer occurs. The standard is effective for our first quarter of fiscal 2019. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In June 2016, the FASB issued ASU No. 2016-13 (Topic 326), Financial Instruments - Credit Losses. The amendments in this update require a financial asset (or a group of financial assets) measured at an amortized cost basis to be presented at the net amount expected to be collected. The new approach to estimating credit losses (referred to as the current expected credit losses model) applies to most financial assets measured at amortized cost and certain other instruments, including trade and other receivables, loans and held-to-maturity debt securities. The standard is effective for our first quarter of fiscal 2021, although early adoption is permitted. We are currently evaluating whether the adoption of this standard will have a material impact on our condensed consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02 (Topic 842), Leases, which supersedes the lease recognition requirements in ASC Topic 840, Leases. The standard requires an entity to recognize right-of-use assets and lease liabilities arising from a lease for operating leases, initially measured at the present value of the lease payments on the condensed consolidated balance sheets. The impact of such leases on the condensed consolidated statements of operations and cash flows will continue to be treated in a similar manner under current GAAP. The standard also requires additional qualitative and quantitative disclosures. The standard is effective for our first quarter of fiscal 2020, although early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements and related disclosures. We anticipate that most of our office leases will be recognized as lease liabilities and corresponding right-of-use assets, and will accordingly have a material impact on our condensed consolidated balance sheets upon adoption. In May 2014, the FASB issued ASU No. 2014-09 (Topic 606), Revenue from Contracts with Customers, which supersedes the revenue recognition requirements in Accounting Standards Codification 605, Revenue Recognition and establishes a new revenue standard. 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 March 2016, the FASB issued ASU No. 2016-08, Revenue from Contracts with Customers: Principal versus Agent Considerations, which clarifies the guidance in the new revenue standard on assessing whether an entity is a principal or an agent in a revenue transaction. This conclusion impacts whether an entity reports revenue on a gross or net basis. In April 2016, the FASB issued ASU No. 2016-10, Revenue from Contracts with Customers: Identifying Performance Obligations and Licensing, which clarifies the guidance in the new revenue standard regarding an entity’s identification of its performance obligations in a contract. In May 2016, the FASB issued ASU No. 2016-12, Narrow-Scope Improvements and Practical Expedients, which amends the guidance in the new revenue standard on collectability, non-cash consideration, presentation of sales tax, and transition. In December 2016, the FASB issued ASU No. 2016-20, Technical Corrections and Improvements to Topic 606, which clarifies narrow aspects of ASC 606 or corrects unintended application of the guidance. The new revenue standard, as amended by ASU No. 2015-14, is effective in the first quarter of fiscal 2019 and may be applied retrospectively to each prior period presented or with the cumulative effect recognized as of the date of initial application. We currently plan to adopt the standard using the cumulative effect transition method. We are still evaluating the total impact of the new revenue standard on our condensed consolidated financial statements, accounting policies, systems and processes. We have allocated internal and external resources to assist in our implementation and evaluation of the new standard. We have also made investments in systems to assist in financial reporting under the new standard. While we cannot reasonably estimate the expected financial statement impact at this time, we believe the adoption of this new standard will have a material impact on our condensed consolidated financial statements, including the way we account for arrangements involving a term license, deferred revenue and sales commissions. Under the new revenue standard, we would be required to recognize term license revenues upfront and the associated maintenance revenues over the contract period. Under the current revenue standard, we recognize both the term license and maintenance revenues ratably over the contract period. In addition, some deferred revenue recorded in accordance with the current revenue standard will never be recognized as revenue upon adoption of the new revenue standard and instead will be part of the cumulative effect adjustment within accumulated deficit. We have also considered the impact of the guidance in ASC 340-40, Other Assets and Deferred Costs; Contracts with Customers, under Topic 606. Under ASC 340-40, we would be required to capitalize and amortize incremental costs of obtaining a contract, such as sales commission costs. Under our current accounting policy, we do not capitalize sales commission costs but rather recognize these costs when they are incurred.

Investments and Fair Value Me20

Investments and Fair Value Measurements (Tables)	6 Months Ended
	Jul. 31, 2017
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 July 31, 2017 and January 31, 2017 (in thousands): July 31, 2017 January 31, 2017 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets: Money market funds $ 390,400 $ — $ — $ 390,400 $ 345,959 $ — $ — $ 345,959 U.S. treasury securities — 663,737 — 663,737 — 662,096 — 662,096 Other — — — — — — 3,000 3,000 Reported as: Assets: Cash and cash equivalents $ 390,400 $ 345,959 Investments, current portion 663,737 662,096 Investments, non-current — 3,000 Total $ 1,054,137 $ 1,011,055
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 July 31, 2017 (in thousands): July 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Fair Value Investments, current portion: U.S. treasury securities $ 664,417 $ — $ (680 ) $ 663,737 Total available-for-sale investments in U.S. treasury securities $ 664,417 $ — $ (680 ) $ 663,737
Schedule of unrealized loss on investments	As of July 31, 2017 , 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 $ 663,737 $ (680 ) $ — $ — $ 663,737 $ (680 )
Investments classified by contractual maturity date	The contractual maturities of our investments are as follows (in thousands): July 31, 2017 Due within one year $ 663,737 Total $ 663,737

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jul. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Rental Payments for Operating Leases	The following summarizes our operating lease commitments as of July 31, 2017 (in thousands): Payments Due by Period Total Less Than 1 1-3 years 3-5 years More Than 5 Operating lease commitments (1) $ 167,265 $ 22,899 $ 41,091 $ 35,848 $ 67,427 _________________________ (1) We entered into sublease agreements for portions of our office space and the future rental income of $5.7 million from these agreements has been included as an offset to our future minimum rental payments.
Schedule of Future Minimum Lease Payments for Financing Lease Obligation	As of July 31, 2017 , future payments on the financing lease obligation are as follows (in thousands): Fiscal Period: Remaining six months of fiscal 2018 $ 6,105 Fiscal 2019 12,552 Fiscal 2020 12,928 Fiscal 2021 13,316 Fiscal 2022 13,715 Fiscal 2023 14,127 Fiscal 2024 8,142 Total future minimum lease payments $ 80,885

Property and Equipment (Tables)

Property and Equipment (Tables)	6 Months Ended
	Jul. 31, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and equipment consisted of the following (in thousands): As of July 31, 2017 January 31, 2017 Computer equipment and software $ 66,822 $ 59,396 Furniture and fixtures 16,555 16,194 Leasehold and building improvements 59,440 58,569 Building (1) 82,250 82,250 225,067 216,409 Less: accumulated depreciation and amortization (63,113 ) (50,014 ) Property and equipment, net $ 161,954 $ 166,395 _________________________ (1) This relates to the capitalization of construction costs in connection with our financing lease obligation, where we are considered the owner of the asset, 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.

Acquisitions, Goodwill and In23

Acquisitions, Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jul. 31, 2017
Goodwill [Line Items]
Finite-Lived and Indefinite-Lived Intangible Assets Acquired as Part of Business Combination	Fair Value Useful Life (months) Developed technology $ 3,500 48 Other acquired intangible assets 300 24 Total intangible assets acquired $ 3,800
Schedule of goodwill	Carrying amount Balance as of January 31, 2017 $ 124,642 Goodwill acquired 14,039 Balance as of July 31, 2017 $ 138,681
Schedule of finite-lived intangible assets	Intangible assets subject to amortization realized from acquisitions as of July 31, 2017 are as follows (in thousands, except useful life): Gross Fair Value Accumulated Amortization Net Book Value Weighted Average Remaining Useful Life (months) Developed technology $ 62,870 $ (28,742 ) $ 34,128 45 Customer relationships 1,810 (1,752 ) 58 11 Other acquired intangible assets 1,480 (1,089 ) 391 27 Total intangible assets subject to amortization $ 66,160 $ (31,583 ) $ 34,577
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 July 31, 2017 is as follows (in thousands): Fiscal Period: Remaining six months of fiscal 2018 $ 5,383 Fiscal 2019 9,016 Fiscal 2020 8,600 Fiscal 2021 8,283 Fiscal 2022 3,295 Total amortization expense $ 34,577

Stock Compensation Plans (Table

Stock Compensation Plans (Tables)	6 Months Ended
	Jul. 31, 2017
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 six months ended July 31, 2017 : 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, 2017 10,401,789 2,057,894 $ 4.67 3.28 $ 109,571 13,924,414 Additional shares authorized 6,858,474 Options exercised (569,089 ) 3.46 Options forfeited and expired 6,172 (6,172 ) 50.38 RSUs and PSUs granted (1,862,988 ) 1,862,988 RSUs and PSUs vested (2,725,292 ) Shares withheld related to net share settlement of RSUs and PSUs 993,508 RSUs and PSUs forfeited and canceled 1,005,466 (1,005,466 ) Balances as of July 31, 2017 17,402,421 1,482,633 $ 4.94 2.85 $ 81,650 12,056,644 Vested and expected to vest 1,482,577 $ 4.94 2.85 $ 81,646 11,712,148 Exercisable as of July 31, 2017 1,459,282 $ 5.00 2.78 $ 80,279 _________________________ (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 July 31, 2017 .

Geographic Information (Tables)

Geographic Information (Tables)	6 Months Ended
	Jul. 31, 2017
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 July 31, Six Months Ended July 31, 2017 2016 2017 2016 United States $ 213,040 $ 165,073 $ 395,252 $ 302,878 International 66,924 47,680 127,160 95,827 Total revenues $ 279,964 $ 212,753 $ 522,412 $ 398,705
Schedule of property and equipment	The following table presents our property and equipment, net of depreciation, by geographic region for the periods presented (in thousands): As of July 31, 2017 January 31, 2017 United States $ 155,372 $ 159,428 International 6,582 6,967 Total property and equipment, net $ 161,954 $ 166,395

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	6 Months Ended
	Jul. 31, 2017
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 July 31, Six Months Ended July 31, 2017 2016 2017 2016 Numerator: Net loss $ (83,500 ) $ (86,597 ) $ (183,431 ) $ (187,493 ) Denominator: Weighted-average common shares outstanding 139,135 133,624 138,509 132,873 Less: Weighted-average unvested common shares subject to repurchase or forfeiture (72 ) (583 ) (73 ) (563 ) Weighted-average shares used to compute net loss per share, basic and diluted 139,063 133,041 138,436 132,310 Net loss per share, basic and diluted $ (0.60 ) $ (0.65 ) $ (1.33 ) $ (1.42 )
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 July 31, 2017 2016 Shares subject to outstanding common stock options 1,483 2,709 Shares subject to outstanding RSUs, PSUs and RSAs 12,127 14,386 Employee stock purchase plan 344 323 Total 13,954 17,418

Description of the Business a27

Description of the Business and Significant Accounting Policies (Details)	6 Months Ended
	Jul. 31, 2017segment
Accounting Policies [Abstract]
Number of operating segments	1

Investments and Fair Value Me28

Investments and Fair Value Measurements (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2017	Jul. 31, 2017	Jan. 31, 2017
Fair Value Measurements
Transfers out of Level 3 investments	$ 3,000
Investments, non-current		$ 5,000	$ 5,000
U.S. treasury securities		663,737
Estimate of Fair Value Measurement | Recurring basis
Fair Value Measurements
Money market funds		390,400	345,959
U.S. treasury securities		663,737	662,096
Other		0	3,000
Assets:
Cash and cash equivalents		390,400	345,959
Investments, current portion		663,737	662,096
Investments, non-current		0	3,000
Total		1,054,137	1,011,055
Estimate of Fair Value Measurement | Recurring basis | Level 1
Fair Value Measurements
Money market funds		390,400	345,959
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		663,737	662,096
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		$ 0	$ 3,000

Investments and Fair Value Me29

Investments and Fair Value Measurements - Amortized Cost to Fair Value Reconciliation (Details) $ in Thousands	Jul. 31, 2017USD ($)
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Fair Value	$ 663,737
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Amortized Cost	664,417
U.S. treasury securities, Unrealized Gains	0
U.S. treasury securities, Unrealized Losses	(680)
U.S. treasury securities, Fair Value	663,737
US Treasury Securities | Investments, Current Portion
Schedule of Available-for-sale Securities [Line Items]
U.S. treasury securities, Amortized Cost	664,417
U.S. treasury securities, Unrealized Gains	0
U.S. treasury securities, Unrealized Losses	(680)
U.S. treasury securities, Fair Value	$ 663,737

Investments and Fair Value Me30

Investments and Fair Value Measurements Fair Value Measurements - Securities in Unrealized Loss Position (Details) - US Treasury Securities $ in Thousands	Jul. 31, 2017USD ($)
Fair Value
Less than 12 Months	$ 663,737
12 Months or Greater	0
Total	663,737
Unrealized Losses
Less than 12 Months	(680)
12 Months or Greater	0
Total	$ (680)

Investments and Fair Value Me31

Investments and Fair Value Measurements - Contractual Maturities (Details) $ in Thousands	Jul. 31, 2017USD ($)
Investments, Debt And Equity Securities And Fair Value Disclosures [Abstract]
Due within one year	$ 663,737
Total	$ 663,737

Commitments and Contingencies32

Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended		12 Months Ended
		Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Facility exit charge						$ 8,600
Remaining cease-use liability		$ 6,700		$ 6,700
Rent expense		5,500	$ 3,500	10,800	$ 6,800
Operating lease obligations, Total	[1]	167,265		167,265
Operating lease obligations, Less than 1 year	[1]	22,899		22,899
Operating lease obligations, 1-3 years	[1]	41,091		41,091
Operating lease obligations, 3-5 years	[1]	35,848		35,848
Operating lease obligations, More than 5 years	[1]	67,427		67,427
Future sublease rental income		$ 5,700		$ 5,700
[1]	We entered into sublease agreements for portions of our office space and the future rental income of $5.7 million from these agreements 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 ($)ft²	Apr. 29, 2014USD ($)ft²	Jul. 31, 2017USD ($)	Jul. 31, 2016USD ($)	Jul. 31, 2017USD ($)	Jul. 31, 2016USD ($)	May 13, 2014USD ($)
Operating Leased Assets [Line Items]
Operating Leases, Rent Expense, Net				$ 5,500	$ 3,500	$ 10,800	$ 6,800
Financing lease obligation				80,885		80,885
Base rent obligation	[1]			$ 167,265		$ 167,265
500 Santana Row, San Jose, CA
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²		235,000
Term of office lease		129 months
Base rent obligation		$ 120,500
San Francisco, CA , 270 Brannan Street [Member]
Operating Leased Assets [Line Items]
Area of Real Estate Property | ft²			182,000
Term of office lease			84 months
Financing lease obligation			$ 92,000
Amount to be Maintained in Letter of Credit as Security for Lease Agreement								$ 6,000
[1]	We entered into sublease agreements for portions of our office space and the future rental income of $5.7 million from these agreements has been included as an offset to our future minimum rental payments.

Commitments and Contingencies34

Commitments and Contingencies - Capital Leases (Details) $ in Thousands	Jul. 31, 2017USD ($)
Commitments and Contingencies Disclosure [Abstract]
Remaining six months of fiscal 2018	$ 6,105
Fiscal 2,019	12,552
Fiscal 2,020	12,928
Fiscal 2,021	13,316
Fiscal 2,022	13,715
Fiscal 2,023	14,127
Fiscal 2,024	8,142
Total future minimum lease payments	$ 80,885

Property and Equipment (Details

Property and Equipment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense on Property and Equipment, net	$ 6,600	$ 5,100	$ 13,000	$ 8,400
Property and equipment, gross	225,067		225,067		$ 216,409
Less: accumulated depreciation and amortization	(63,113)		(63,113)		(50,014)
Property and equipment, net	161,954		161,954		166,395
Computer equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	66,822		66,822		59,396
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	16,555		16,555		16,194
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	59,440		59,440		58,569
Building
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 82,250		$ 82,250		$ 82,250

Acquisitions, Goodwill and In36

Acquisitions, Goodwill and Intangible Assets (Details Textual) $ in Thousands	May 15, 2017USD ($)	Jul. 31, 2017USD ($)	Jul. 31, 2016USD ($)	Jul. 31, 2017USD ($)segment	Jul. 31, 2016USD ($)	Jan. 31, 2017USD ($)
Business Acquisition [Line Items]
Goodwill		$ 138,681		$ 138,681		$ 124,642
Number of operating segments | segment				1
Amortization of intangible assets		$ 4,200	$ 3,100	$ 6,900	$ 6,200
Acquisition [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Purchase price paid in cash	$ 17,300
Goodwill	14,000
Acquired fair value of finite-lived intangible assets	3,800
Deferred tax liability	$ 500

Acquisitions, Goodwill and In37

Acquisitions, Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	May 15, 2017	Jul. 31, 2017
Developed technology
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life		45 months
Customer relationships
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life		11 months
Other acquired intangible assets
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Useful Life		27 months
Acquisition [Member]
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired fair value of finite-lived intangible assets	$ 3,800
Acquisition [Member] | Developed technology
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired fair value of finite-lived intangible assets	$ 3,500
Useful Life	48 months
Acquisition [Member] | Other acquired intangible assets
Finite-Lived and Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Line Items]
Acquired fair value of finite-lived intangible assets	$ 300
Useful Life	24 months

Acquisitions, Goodwill and In38

Acquisitions, Goodwill and Intangible Assets (Details 2) $ in Thousands	6 Months Ended
	Jul. 31, 2017USD ($)
Goodwill [Roll Forward]
Balance as of January 31, 2017	$ 124,642
Goodwill acquired	14,039
Balance as of July 31, 2017	$ 138,681

Acquisitions, Goodwill and In39

Acquisitions, Goodwill and Intangible Assets (Details 3) $ in Thousands	6 Months Ended
	Jul. 31, 2017USD ($)
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 66,160
Accumulated Amortization	(31,583)
Total	34,577
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	62,870
Accumulated Amortization	(28,742)
Total	$ 34,128
Weighted Average Remaining Useful Life	45 months
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 1,810
Accumulated Amortization	(1,752)
Total	$ 58
Weighted Average Remaining Useful Life	11 months
Other acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Fair Value	$ 1,480
Accumulated Amortization	(1,089)
Total	$ 391
Weighted Average Remaining Useful Life	27 months

Acquisitions, Goodwill and In40

Acquisitions, Goodwill and Intangible Assets (Details 4) $ in Thousands	Jul. 31, 2017USD ($)
Business Combinations [Abstract]
Remaining six months of fiscal 2018	$ 5,383
Fiscal 2,019	9,016
Fiscal 2,020	8,600
Fiscal 2,021	8,283
Fiscal 2,022	3,295
Total	$ 34,577

Debt Financing Facilities (Deta

Debt Financing Facilities (Details) - Revolving line of credit facility - USD ($)	6 Months Ended
	Jul. 31, 2017	May 09, 2013
Debt Financing Facilities
Maximum borrowing capacity		$ 25,000,000
Prime rate	4.25%
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)	6 Months Ended
	Jul. 31, 2017shares
Available for Grant
Balances at the beginning of the period (in shares)	10,401,789
Additional Shares Authorized (in shares)	6,858,474
Options forfeited and expired (in shares)	6,172
Equity other than options granted (in shares)	1,862,988
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Withheld Related to Share Settlement	993,508
Equity other than options forfeited (in shares)	1,005,466
Balances at the end of the period (in shares)	17,402,421

Stock Compensation Plans (Det43

Stock Compensation Plans (Details 2) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	6 Months Ended	12 Months Ended
		Jul. 31, 2017	Jul. 31, 2017	Jan. 31, 2017
Shares
Options exercised (in shares)
Options forfeited and expired (in shares)			(6,172)
Number of Shares
Equity other than options granted (in shares)			1,862,988
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Withheld Related to Share Settlement			993,508
Equity other than options forfeited (in shares)			(1,005,466)
Options
Shares
Outstanding at the beginning of the period (in shares)			2,057,894
Options exercised (in shares)			(569,089)
Options forfeited and expired (in shares)			(6,172)
Outstanding at the end of the period (in shares)				2,057,894
Vested and expected to vest at the end of the period (in shares)		1,482,577	1,482,577
Exercisable at the end of the period (in shares)		1,459,282	1,459,282
Weighted-Average Exercise Price Per Share
Balances at the beginning of the period (in dollars per share)			$ 4.67
Options exercised (in dollars per share)			3.46
Options forfeited (in dollars per share)			50.38
Balances at the end of the period (in dollars per share)		$ 4.94	4.94	$ 4.67
Vested and expected to vest at the end of the period (in dollars per share)		4.94	4.94
Exercisable at the end of the period (in dollars per share)		$ 5	$ 5
Weighted-Average Remaining Contractual Term
Balances at the end of the period			2 years 10 months 6 days	3 years 3 months 11 days
Vested and expected to vest at the end of the period			2 years 10 months 6 days
Vested and exercisable at the end of the period			2 years 9 months 11 days
Aggregate Intrinsic Value
Outstanding at the end of the period (in dollars)	[1]	$ 81,650	$ 81,650	$ 109,571
Vested and expected to vest at the end of the period (in dollars)	[1]	81,646	81,646
Vested and exercisable at the end of the period (in dollars)	[1]	80,279	80,279
Unrecognized compensation cost
Total unrecognized compensation cost related to stock options		$ 1,300	1,300
Weighted-average period over which unrecognized compensation cost is expected to be recognized		1 year 1 month
Additional disclosures
Total intrinsic value of options exercised (in dollars)			$ 32,800
RSUs and PSUs
Number of Shares
Balances at the beginning of the period (in shares)			13,924,414
Equity other than options granted (in shares)			1,862,988
Equity other than options vested (in shares)			(2,725,292)
Equity other than options forfeited (in shares)			(1,005,466)
Balances at the end of the period (in shares)		12,056,644	12,056,644	13,924,414
RSUs vested and expected to vest at the end of the period (in shares)		11,712,148	11,712,148
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized		2 years 7 months 18 days
Total unrecognized compensation cost		$ 507,700	$ 507,700
Additional disclosures
Weighted-average grant date fair value of awards granted (in dollars per share)			$ 61.05
PSUs
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized			2 years 10 months 18 days
Total unrecognized compensation cost		$ 31,300	$ 31,300
Additional disclosures
Weighted-average grant date fair value of awards granted (in dollars per share)			$ 60.25
RSAs
Number of Shares
Equity other than options granted (in shares)				671,782
Equity other than options vested (in shares)			(414,943)
Equity other than options forfeited (in shares)			(186,003)
Balances at the end of the period (in shares)		70,836	70,836
Unrecognized compensation cost
Weighted-average period over which unrecognized compensation cost is expected to be recognized		1 year 4 months 18 days
Total unrecognized compensation cost		$ 4,000	$ 4,000
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 July 31, 2017.

Geographic Information Narrativ

Geographic Information Narrative (Details) - customer	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Number of customers accounting for 10 percent or more of the AR concentration risk	2		2		1
Customer concentration risk | Revenues
Concentration Risk [Line Items]
Number of customers accounting for 10 percent or more of the revenue concentration risk	2	2	2	2
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			31.00%		30.00%
Customer One | Customer concentration risk | Revenues
Concentration Risk [Line Items]
Concentration risk, percentage	28.00%	25.00%	28.00%	24.00%
Customer Two | Customer concentration risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage			14.00%
Customer Two | Customer concentration risk | Revenues
Concentration Risk [Line Items]
Concentration risk, percentage	19.00%	17.00%	18.00%	16.00%

Geographic Information (Details

Geographic Information (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Concentration Risk [Line Items]
Revenues	$ 279,964	$ 212,753	$ 522,412	$ 398,705
Property and Equipment by Geographic Area
Property and equipment	161,954		161,954		$ 166,395
United States
Concentration Risk [Line Items]
Revenues	213,040	165,073	395,252	302,878
Property and Equipment by Geographic Area
Property and equipment	155,372		155,372		159,428
International
Concentration Risk [Line Items]
Revenues	66,924	$ 47,680	127,160	$ 95,827
Property and Equipment by Geographic Area
Property and equipment	$ 6,582		$ 6,582		$ 6,967

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Income Tax Disclosure [Abstract]
Income tax provision	$ 353	$ 1,110	$ 1,691	$ 2,335

Net Loss Per Share (Details)

Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Numerator
Net loss	$ (83,500)	$ (86,597)	$ (183,431)	$ (187,493)
Denominator:
Weighted-average common shares outstanding (in shares)	139,135	133,624	138,509	132,873
Less: Weighted-average unvested common shares subject to repurchase or forfeiture (in shares)	(72)	(583)	(73)	(563)
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	139,063	133,041	138,436	132,310
Net loss per share
Net loss per share, basic and diluted (in dollars per share)	$ (0.60)	$ (0.65)	$ (1.33)	$ (1.42)

Net Loss Per Share (Details 2)

Net Loss Per Share (Details 2) - shares shares in Thousands	6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Potentially dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	13,954	17,418
Shares subject to outstanding common stock options
Potentially dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,483	2,709
Shares subject to outstanding RSUs, PSUs and RSAs
Potentially dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	12,127	14,386
Employee stock purchase plan
Potentially dilutive securities
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	344	323

Related Party Transactions (Det

Related Party Transactions (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016	Jan. 31, 2017
Related Party Transactions [Abstract]
Revenue from sales to the related party	$ 3,300,000	$ 1,200,000	$ 6,100,000	$ 2,400,000
Expenses related to purchases from the related party	300,000	$ 100,000	500,000	$ 200,000
Accounts receivable from the related party	1,400,000		1,400,000		$ 1,900,000
Accounts payable to related parties	$ 0		$ 0		$ 0