Splunk (SPLK) 10-Q 13 Dec 13 2014 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Oct. 31, 2013	Dec. 09, 2013
Document and Entity Information	'	'
Entity Registrant Name	'SPLUNK INC	'
Entity Central Index Key	'0001353283	'
Document Type	'10-Q	'
Document Period End Date	31-Oct-13	'
Amendment Flag	'false	'
Current Fiscal Year End Date	'--01-31	'
Entity Current Reporting Status	'Yes	'
Entity Filer Category	'Non-accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	107,269,581
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q3	'

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Oct. 31, 2013	Jan. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$351,895	$305,939
Accounts receivable, net	53,995	63,948
Prepaid expenses and other current assets	8,669	6,861
Total current assets	414,559	376,748
Property and equipment, net	14,437	13,205
Intangible assets, net	4,594	0
Goodwill	5,734	0
Other assets	502	492
Total assets	439,826	390,445
Current liabilities:	'	'
Accounts payable	2,018	1,632
Accrued payroll and compensation	30,655	28,123
Accrued expenses and other liabilities	12,781	7,636
Deferred revenue, current portion	107,712	79,568
Total current liabilities	153,166	116,959
Deferred revenue, non-current	33,433	35,144
Other liabilities, non-current	3,145	798
Total non-current liabilities	36,578	35,942
Total liabilities	189,744	152,901
Commitments and contingencies (Note 3)	'	'
Stockholders' equity:	'	'
Common stock: $0.001 par value; 1,000,000,000 shares authorized; 105,237,779 shares issued and outstanding at July 31, 2013, and 100,920,350 shares issued and outstanding at January 31, 2013	107	101
Accumulated other comprehensive loss	-156	-135
Additional paid-in capital	387,207	328,277
Accumulated deficit	-137,076	-90,699
Total stockholders' equity	250,082	237,544
Total liabilities and stockholders' equity	$439,826	$390,445

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Oct. 31, 2013	Jan. 31, 2013
Statement of Financial Position [Abstract]	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	106,792,588	100,920,350
Common stock, shares outstanding	106,792,588	100,920,350

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended				9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2013		Oct. 31, 2012
Revenues	'		'		'		'
License	$50,873		$34,557		$130,230		$89,146
Maintenance and services	27,760		17,488		72,483		44,573
Total revenues	78,633		52,045		202,713		133,719
Cost of revenues	'		'		'		'
License	84	[1]	62	[1]	229	[1]	283	[1]
Maintenance and services	10,441	[1]	5,817	[1]	24,398	[1]	14,506	[1]
Total cost of revenues	10,525	[1]	5,879	[1]	24,627	[1]	14,789	[1]
Gross profit	68,108		46,166		178,086		118,930
Operating expenses	'		'		'		'
Research and development	18,961	[1]	11,074	[1]	49,635	[1]	28,568	[1]
Sales and marketing	53,052	[1]	32,847	[1]	138,999	[1]	84,753	[1]
General and administrative	12,917	[1]	7,625	[1]	35,275	[1]	21,718	[1]
Total operating expenses	84,930	[1]	51,546	[1]	223,909	[1]	135,039	[1]
Operating loss	-16,822		-5,380		-45,823		-16,109
Interest and other income (expense), net	'		'		'		'
Interest income (expense), net	55		31		174		115
Other income (expense), net	-283		0		-459		0
Change in fair value of preferred stock warrants	0		0		0		-14,087
Total interest and other income (expense), net	-228		31		-285		-13,972
Loss before income taxes	-17,050		-5,349		-46,108		-30,081
Provision for income taxes	-500		125		269		438
Net loss	($16,550)		($5,474)		($46,377)		($30,519)
Net loss per share:	'		'		'		'
Basic and diluted (in dollars per share)	($0.16)		($0.06)		($0.45)		($0.41)
Weighted-average shares outstanding:	'		'		'		'
Basic and diluted (in shares)	106,008		96,671		104,063		73,951
[1]	Amounts include stock-based compensation expense, as follows: Cost of revenues, $1,165 thousand, $322 thousand, $2,735 thousand and $697 thousand; Research and development, $4,405 thousand, $1,560 thousand, $10,995 thousand and $3,722 thousand; Sales and marketing, $5,947 thousand, $2,093 thousand, $15,425 thousand and $4,456 thousand; General and administrative, $2,815 thousand, $710 thousand, $6,969 thousand and $2,348 thousand for the three and nine months ended October 31, 2013 and 2012, respectively.

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Stock-based compensation expense	$14,332	$4,685	$36,124	$11,223
Cost of revenues	'	'	'	'
Stock-based compensation expense	1,165	322	2,735	697
Research and development	'	'	'	'
Stock-based compensation expense	4,405	1,560	10,995	3,722
Sales and marketing	'	'	'	'
Stock-based compensation expense	5,947	2,093	15,425	4,456
General and administrative	'	'	'	'
Stock-based compensation expense	$2,815	$710	$6,969	$2,348

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Net loss	($16,550)	($5,474)	($46,377)	($30,519)
Other comprehensive gain (loss):	'	'	'	'
Foreign currency translation adjustments	87	21	-21	9
Comprehensive loss	($16,463)	($5,453)	($46,398)	($30,510)

CONDENSED_CONSOLIDATED_STATEME3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012
Cash flows from operating activities	'	'
Net loss	($46,377)	($30,519)
Adjustments to reconcile net loss to net cash provided by operating activities	'	'
Depreciation and amortization	4,500	3,357
Impairment of long-lived assets	2,128	0
Change in fair value of preferred stock warrants	0	14,087
Stock-based compensation expense	36,124	11,223
Excess tax benefit from employee stock plans	-539	0
Changes in operating assets and liabilities	'	'
Accounts receivable, net	9,953	-5,683
Prepaid expenses, other current and non-current assets	-822	-1,280
Accounts payable	267	-268
Accrued compensation	2,532	9,573
Accrued expenses and other liabilities	5,220	66
Deferred revenue	26,433	21,301
Net cash provided by operating activities	39,419	21,857
Cash flows from investing activities	'	'
Acquisition, net of cash acquired	-8,958	0
Change in restricted cash	0	514
Purchases of property and equipment	-7,265	-5,720
Net cash used in investing activities	-16,223	-5,206
Cash flows from financing activities	'	'
Repayments of term debt	0	-2,289
Proceeds from initial public offering, net of offering costs	0	225,225
Proceeds from exercise of stock options	18,865	2,123
Excess tax benefit from employee stock plans	539	0
Proceeds from employee stock purchase plan	6,076	0
Taxes paid related to net share settlement of equity awards	-2,752	0
Net cash provided by financing activities	22,728	225,059
Effect of exchange rate changes on cash and cash equivalents	32	15
Net increase in cash and cash equivalents	45,956	241,725
Cash and cash equivalents	'	'
Beginning of period	305,939	31,599
End of period	351,895	'
Supplemental disclosures	'	'
Cash paid for interest	0	40
Cash paid for income taxes	297	80
Non-cash investing and financing activities	'	'
Accrued purchases of property and equipment	856	60
Vesting of early exercised options	83	818
Conversion of preferred stock to common stock	$0	$40,913

Description_of_the_Business_an

Description of the Business and Significant Accounting Policies	9 Months Ended
	Oct. 31, 2013
Accounting Policies [Abstract]	'
Description of the Business and Significant Accounting Policies	'
	Description of the Business and Significant Accounting Policies
	Business
	Splunk Inc. (“we”) provides an innovative software platform that enables organizations to gain real-time operational intelligence by harnessing the value of their data. Our software collects and indexes data, regardless of format or source, and enables users to search, correlate, analyze, monitor and report on this data. Our software addresses large and diverse data sets, commonly referred to as big data, and is specifically tailored for machine-generated data. Machine data is produced by nearly every software application and electronic device in an organization and contains a definitive, time-stamped record of various activities, such as transactions, customer and user activities and security threats. Our software is designed to help users in various roles, including IT and business professionals, analyze machine data and realize real-time visibility into and intelligence about their organization’s operations. This operational intelligence enables organizations to improve service levels, reduce costs, mitigate security risks, demonstrate and maintain compliance and gain new insights that enable them to drive better business decisions. We were incorporated in California in October 2003 and were reincorporated in Delaware in May 2006.
	Fiscal Year
	Our fiscal year ends on January 31. References to fiscal 2014 or fiscal year 2014, for example, refer to the fiscal year ending January 31, 2014.
	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, 2013 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, 2013, filed on April 1, 2013. 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, 2013 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 2014.
	Recently Issued Accounting Pronouncements
	In July 2012, the Financial Accounting Standards Board (the “FASB”) issued updated authoritative guidance to allow entities to use a qualitative approach to test indefinite-lived intangible assets for impairment. This guidance permits an entity to first perform a qualitative assessment to determine whether it is more likely than not that the fair value of an indefinite-lived intangible asset is less than its carrying value. If it is concluded that this is the case, it is necessary to perform the currently prescribed quantitative impairment test by comparing the fair value of the indefinite-lived intangible asset with its carrying value. Otherwise, the quantitative impairment test is not required. We do not believe that the adoption will have a material effect on the condensed consolidated financial statements.
	In February 2013, the FASB issued updated authoritative guidance requiring entities to report the effect of significant reclassifications out of accumulated other comprehensive income on the respective line items in net income if the amount being reclassified is required under U.S. GAAP to be reclassified in its entirety to net income. For other amounts that are not required under U.S. GAAP to be reclassified in their entirety from accumulated other comprehensive income to net income in the same reporting period, an entity is required to cross-reference other disclosures required under U.S. GAAP that provide additional detail about those amounts. We adopted this guidance during the three months ended April 30, 2013. The adoption of this guidance did not impact our financial statements, as the guidance is related to disclosure only and we have not had any significant reclassifications out of accumulated other comprehensive loss.
	In July 2013, the FASB determined that an unrecognized tax benefit should be presented as a reduction of a deferred tax asset for a net operating loss (“NOL”) carryforward or other tax credit carryforward when settlement in this manner is available under applicable tax law. This guidance is effective for our interim and annual periods beginning February 1, 2014. We do not expect the adoption of this guidance to have an impact on our financial position or results of operations.
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 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.
	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, 2013 and 2012. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenues and expenses are translated at the average exchange rate during the period. Equity transactions are translated using historical exchange rates.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Oct. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	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, 2013 and January 31, 2013 (in thousands):
		31-Oct-13								31-Jan-13
		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	Assets:
	Money market funds	$	325,964	$	—	$	—	$	325,964	$	250,810	$	—	$	—	$	250,810
	Reported as:
	Assets:
	Cash and cash equivalents							$	325,964							$	250,810
	Total							$	325,964							$	250,810

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Oct. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Operating Lease Commitments
	We lease our office spaces under non-cancelable operating leases with rent expense recognized on a straight-line basis over the lease term. Rent expense was $1.9 million and $0.9 million for the three months ended October 31, 2013 and 2012, respectively, and $4.3 million and $2.6 million for the nine months ended October 31, 2013 and 2012, respectively.
	Legal Proceedings
	We are subject to certain routine legal 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 officers or directors of the company or the company's 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, 2013.  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, 2013
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
		31-Oct-13			31-Jan-13
	Computer equipment and software	$	18,860		$	16,077
	Furniture and fixtures	4,144			2,714
	Leasehold improvements	7,642			4,129
		30,646			22,920
	Less: accumulated depreciation and amortization	(16,209		)	(9,715		)
	Property and equipment, net	$	14,437		$	13,205
	Depreciation and amortization expense was $3.6 million and $1.2 million for the three months ended October 31, 2013 and 2012, respectively. Depreciation and amortization expense was $6.5 million and $3.4 million for the nine months ended October 31, 2013 and 2012, respectively. Included in depreciation and amortization expense during the three and nine months ended October 31, 2013 was a $2.1 million impairment charge of a long-lived asset for previously capitalized Storm software development costs as a result of our decision to make Storm available to customers at no cost.

Acquisition

Acquisition	9 Months Ended
	Oct. 31, 2013
Business Combinations [Abstract]	'
Acquisition	'
	Acquisition
	On September 25, 2013, we acquired BugSense, a privately-held Delaware company, which developed and offered as a service an analytics solution for machine data generated by mobile devices. This acquisition has been accounted for as a business combination. The purchase price of $9.0 million paid in cash was preliminarily allocated as follows: $4.7 million to identifiable intangible assets, $0.7 million to net deferred tax liability recorded and $0.7 million to net liabilities assumed, and the excess $5.7 million of the purchase price over the fair value of net assets acquired was recorded as goodwill allocated to our one operating segment. Goodwill is primarily attributable to our ability to further improve the overall performance of our mobile data gathering capabilities, expand our visibility into machine data generated by mobile devices and the value of acquired personnel. This goodwill is not deductible for U.S. income tax purposes. Pro forma results of operations of the acquired business have not been presented as we do not consider the results to have a material effect during any of the periods presented on our Condensed Consolidated Statement of Operations. We are still finalizing the allocation of the purchase price to the individual tax liabilities assumed, 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):
		Fair value		Useful Life (months)
	Developed Technology	$	2,940	36
	Customer Relationships	1,460		36
	Other acquired intangible assets	330		24
	Total intangible assets subject to amortization	$	4,730

Debt_Financing_Facilities

Debt Financing Facilities	9 Months Ended
	Oct. 31, 2013
Debt Disclosure [Abstract]	'
Debt Financing Facilities	'
	Debt Financing Facilities
	In May 2009, we entered into a Loan and Security Agreement with Silicon Valley Bank, which expired on April 30, 2013. The agreement included a revolving line of credit facility.
	On May 9, 2013 we entered into a Loan Agreement with Silicon Valley Bank. The agreement provides for a revolving line of credit facility, which expires May 9, 2015. 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 2013) or the LIBOR rate plus 2.75%. As of October 31, 2013, 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, 2013.

Convertible_Preferred_Stock

Convertible Preferred Stock	9 Months Ended
	Oct. 31, 2013
Temporary Equity Disclosure [Abstract]	'
Convertible Preferred Stock	'
	Convertible Preferred Stock
	Upon the closing of our initial public offering ("IPO") in April 2012, all outstanding shares of convertible preferred stock were converted into shares of common stock. Warrants to purchase convertible preferred stock were converted into warrants to purchase common stock.
	Warrants to Purchase Convertible Preferred Stock
	Prior to the closing of our IPO in April 2012, we re-measured the fair value of the preferred stock warrants at each balance sheet date. The fair value of the outstanding warrants was classified within non-current liabilities on the consolidated balance sheets and any changes in fair value were recognized as a component of Other income (expense), net in our consolidated statements of operations. We performed the final re-measurement of the warrants at the closing date of our IPO and recorded an expense of $14.1 million arising from the revaluation during the three months ended April 30, 2012. The fair value of the outstanding warrants was determined using the Black-Scholes option-pricing model. We determined the fair value of each warrant on the issuance date and subsequent reporting dates using the Black-Scholes pricing model utilizing the assumptions noted below. The expected term of the warrant is based on the remaining contractual expiration period. The expected stock price volatility for our stock was determined by examining the historical volatilities of a group of our industry peers as we did not have any trading history of our common stock. The risk-free interest rate was calculated using the average of the published interest rates for United States Treasury zero-coupon issues with maturities that approximate the expected term. The dividend yield assumption is zero as we did not have any history of, nor plans for, dividend payments.
	There were no preferred stock warrants outstanding during the nine months ended October 31, 2013. The assumptions below were used to estimate the value of the preferred stock warrants during the three months ended April 30, 2012:
	Expected volatility	49.7-53.2%
	Risk-free rate	0.50-1.40%
	Dividend yield	0	%
	Expected term (in years)	3.38-6.30

Stock_Compensation_Plans

Stock Compensation Plans	9 Months Ended
	Oct. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Compensation Plans	'
	Stock Compensation Plans
	The following table summarizes the stock option and restricted stock unit ("RSU") award activity during the nine months ended October 31, 2013:
				Options Outstanding							RSUs
											Outstanding
		Available		Shares		Weighted-		Weighted-	Aggregate		Shares
		for Grant				Average		Average	Intrinsic
						Exercise		Remaining	Value (1)
						Price		Contractual
						Per Share		Term
									(in thousands)
	Balances as of January 31, 2013	7,867,788		18,917,547		$	4.26				2,904,707
	Additional Shares Authorized	5,046,017
	Options exercised			(5,393,800	)	3.5
	Options forfeited and expired	332,772		(332,772	)	6.6
	RSUs granted	(1,757,335	)								1,757,335
	RSUs vested										-143,141
	Shares withheld related to net share settlement of RSUs	48,731
	RSUs forfeited	202,793									(202,793	)
	Balances as of October 31, 2013	11,740,766		13,190,975		$	4.5	6.9	$	767,799	4,316,108
	Vested and expected to vest			12,876,731		$	4.44	6.87	$	750,294	4,100,303
	Exercisable as of October 31, 2013			6,906,089		$	2.23	5.89	$	417,684
	(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, 2013.
	Under net settlement procedures currently 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. The remaining shares are delivered to the recipient as shares of our common stock. The amount remitted to the tax authorities for the employees' tax obligation is reflected as a financing activity within our condensed consolidated statements of cash flows. 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.
	During the nine months ended October 31, 2013, $0.3 million of tax benefits have been realized from exercised stock options. At October 31, 2013, there was a total unrecognized compensation cost of $21.5 million related to these stock options, adjusted for estimated forfeitures, which is expected to be recognized over a weighted-average period of 1.94 years. At October 31, 2013, there was a total unrecognized compensation cost of $123.0 million related to RSUs, adjusted for estimated forfeitures, which is expected to be recognized over the next 3.28 years.
	The total intrinsic value of options exercised during the nine months ended October 31, 2013 was $229.1 million. The weighted-average grant date fair value of RSUs granted was $47.60 per share for the nine months ended October 31, 2013.

Geographic_Information

Geographic Information	9 Months Ended
	Oct. 31, 2013
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				Nine Months
		Ended October 31,				Ended October 31,
		2013		2012		2013		2012
	United States	$	61,844	$	41,989	$	159,599	$	107,580
	International	16,789		10,056		43,114		26,139
	Total Revenues	$	78,633	$	52,045	$	202,713	$	133,719
	Other than the United States, no other individual country exceeded 10% of total revenues during any of the periods presented. At October 31, 2013, there was one channel partner that represented approximately 23% of total accounts receivable and 16% of total revenues during the three months ended October 31, 2013. The accounts receivable and revenues from this channel partner is comprised of a number of customer transactions, none of which were individually greater than 10% of total accounts receivable at October 31, 2013 or total revenues for the three months ended October 31, 2013. At January 31, 2013, there was one customer that represented approximately 31% 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, 2013		January 31, 2013
	United States	$	12,941	$	11,471
	International	1,496		1,734
	Total property and equipment, net	$	14,437	$	13,205
	As of October 31, 2013, our property and equipment in one country, the United Kingdom, represented approximately 10% of our total property and equipment. Other than the United States and the United Kingdom, no other country represented 10% or more of our total property and equipment.

Income_Taxes

Income Taxes	9 Months Ended
	Oct. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	For the three months ended October 31, 2013 and 2012, we recorded $0.5 million in income tax benefit and $0.1 million in income tax expense, respectively. For the nine months ended October 31, 2013 and 2012, we recorded $0.3 million and $0.4 million in income tax expense, respectively. The decreases in income tax expense were primarily due to the partial release of the deferred tax asset valuation allowance from the acquisition, partially offset by an increase in taxable income in our international jurisdictions and federal alternative minimum tax. The net deferred tax liability from the acquisition 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.
	There were no material changes to our unrecognized tax benefits in the nine months ended October 31, 2013, 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, 2013
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, and warrants, 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							Nine Months
		Ended October 31,							Ended October 31,
		2013				2012			2013			2012
	Numerator:
	Net loss	$	(16,550	)		$	(5,474	)	$	(46,377	)	$	(30,519	)
	Denominator:
	Weighted-average common shares outstanding	106,079				96,786			104,144			74,210
	Less: Weighted-average unvested common shares subject to repurchase or forfeiture	(71		)		(115		)	(81		)	(259		)
	Weighted-average shares used to compute net loss per share, basic and diluted	106,008				96,671			104,063			73,951
	Net loss per share, basic and diluted	$	(0.16	)		$	(0.06	)	$	(0.45	)	$	(0.41	)
	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,
		2013			2012
	Shares subject to outstanding common stock options	13,191			22,190
	Shares subject to outstanding RSUs	4,316			399
	Employee stock purchase plan	296			623
	Shares subject to common stock warrants	—			405
	Total	17,803			23,617

Related_Party_Transactions

Related Party Transactions	9 Months Ended
	Oct. 31, 2013
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 revenue from sales to these companies of $0.6 million and $0.5 million for the three months ended October 31, 2013 and 2012, respectively, and $1.8 million and $1.4 million for the nine months ended October 31, 2013 and 2012, respectively. We also recorded $0.3 million and $0.2 million in expenses related to purchases from these companies during the three months ended October 31, 2013 and 2012, respectively, and $0.9 million and $0.6 million for the nine months ended October 31, 2013 and 2012, respectively. We had $0.3 million and $0.0 of accounts receivable from these companies as of October 31, 2013 and January 31, 2013, respectively. There were no accounts payable to these companies as of October 31, 2013 or January 31, 2013.

Subsequent_Event

Subsequent Event	9 Months Ended
	Oct. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Event	'
	Subsequent Event
	On December 6, 2013, we acquired Cloudmeter, a privately-held Delaware company, which developed technology that enables users to capture data directly from network traffic for $21.0 million in cash. The acquisition will be accounted for as a business combination and, accordingly, the total purchase price will be allocated to the tangible and intangible assets acquired and the liabilities assumed based on their respective fair values on the acquisition date. We have not yet determined the purchase price allocation for the transaction.

Description_of_the_Business_an1

Description of the Business and Significant Accounting Policies (Policies)	9 Months Ended
	Oct. 31, 2013
Accounting Policies [Abstract]	'
Fiscal Year	'
	Fiscal Year
	Our fiscal year ends on January 31. References to fiscal 2014 or fiscal year 2014, for example, refer to the fiscal year ending January 31, 2014.
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, 2013 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, 2013, filed on April 1, 2013. 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, 2013 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 2014.
Use of Estimates	'
	Use of Estimates
	The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America 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 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.
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, 2013 and 2012. All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Revenues and expenses are translated at the average exchange rate during the period. Equity transactions are translated using historical exchange rates.

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Oct. 31, 2013
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, 2013 and January 31, 2013 (in thousands):
		31-Oct-13								31-Jan-13
		Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
	Assets:
	Money market funds	$	325,964	$	—	$	—	$	325,964	$	250,810	$	—	$	—	$	250,810
	Reported as:
	Assets:
	Cash and cash equivalents							$	325,964							$	250,810
	Total							$	325,964							$	250,810

Property_and_Equipment_Tables

Property and Equipment (Tables)	9 Months Ended
	Oct. 31, 2013
Property, Plant and Equipment [Abstract]	'
Property and Equipment	'
	Property and equipment consisted of the following (in thousands):
		As of
		31-Oct-13			31-Jan-13
	Computer equipment and software	$	18,860		$	16,077
	Furniture and fixtures	4,144			2,714
	Leasehold improvements	7,642			4,129
		30,646			22,920
	Less: accumulated depreciation and amortization	(16,209		)	(9,715		)
	Property and equipment, net	$	14,437		$	13,205

Acquisition_Tables

Acquisition (Tables)	9 Months Ended
	Oct. 31, 2013
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):
		Fair value		Useful Life (months)
	Developed Technology	$	2,940	36
	Customer Relationships	1,460		36
	Other acquired intangible assets	330		24
	Total intangible assets subject to amortization	$	4,730

Convertible_Preferred_Stock_Ta

Convertible Preferred Stock (Tables)	9 Months Ended
	Oct. 31, 2013
Temporary Equity Disclosure [Abstract]	'
Schedule of assumptions used to estimate the value of the preferred stock warrants	'
	The assumptions below were used to estimate the value of the preferred stock warrants during the three months ended April 30, 2012:
	Expected volatility	49.7-53.2%
	Risk-free rate	0.50-1.40%
	Dividend yield	0	%
	Expected term (in years)	3.38-6.30

Stock_Compensation_Plans_Table

Stock Compensation Plans (Tables)	9 Months Ended
	Oct. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Share Based Compensation Stock Options and Restricted Stock Units Award Activity [Table Text Block]	'
	The following table summarizes the stock option and restricted stock unit ("RSU") award activity during the nine months ended October 31, 2013:
				Options Outstanding							RSUs
											Outstanding
		Available		Shares		Weighted-		Weighted-	Aggregate		Shares
		for Grant				Average		Average	Intrinsic
						Exercise		Remaining	Value (1)
						Price		Contractual
						Per Share		Term
									(in thousands)
	Balances as of January 31, 2013	7,867,788		18,917,547		$	4.26				2,904,707
	Additional Shares Authorized	5,046,017
	Options exercised			(5,393,800	)	3.5
	Options forfeited and expired	332,772		(332,772	)	6.6
	RSUs granted	(1,757,335	)								1,757,335
	RSUs vested										-143,141
	Shares withheld related to net share settlement of RSUs	48,731
	RSUs forfeited	202,793									(202,793	)
	Balances as of October 31, 2013	11,740,766		13,190,975		$	4.5	6.9	$	767,799	4,316,108
	Vested and expected to vest			12,876,731		$	4.44	6.87	$	750,294	4,100,303
	Exercisable as of October 31, 2013			6,906,089		$	2.23	5.89	$	417,684
	(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, 2013.

Geographic_Information_Tables

Geographic Information (Tables)	9 Months Ended
	Oct. 31, 2013
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				Nine Months
		Ended October 31,				Ended October 31,
		2013		2012		2013		2012
	United States	$	61,844	$	41,989	$	159,599	$	107,580
	International	16,789		10,056		43,114		26,139
	Total Revenues	$	78,633	$	52,045	$	202,713	$	133,719
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, 2013		January 31, 2013
	United States	$	12,941	$	11,471
	International	1,496		1,734
	Total property and equipment, net	$	14,437	$	13,205

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	9 Months Ended
	Oct. 31, 2013
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							Nine Months
		Ended October 31,							Ended October 31,
		2013				2012			2013			2012
	Numerator:
	Net loss	$	(16,550	)		$	(5,474	)	$	(46,377	)	$	(30,519	)
	Denominator:
	Weighted-average common shares outstanding	106,079				96,786			104,144			74,210
	Less: Weighted-average unvested common shares subject to repurchase or forfeiture	(71		)		(115		)	(81		)	(259		)
	Weighted-average shares used to compute net loss per share, basic and diluted	106,008				96,671			104,063			73,951
	Net loss per share, basic and diluted	$	(0.16	)		$	(0.06	)	$	(0.45	)	$	(0.41	)
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,
		2013			2012
	Shares subject to outstanding common stock options	13,191			22,190
	Shares subject to outstanding RSUs	4,316			399
	Employee stock purchase plan	296			623
	Shares subject to common stock warrants	—			405
	Total	17,803			23,617

Description_of_the_Business_an2

Description of the Business and Significant Accounting Policies (Details)	9 Months Ended
	Oct. 31, 2013
	segment
Accounting Policies [Abstract]	'
Number of operating segments	1

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (Recurring basis, USD $)	Oct. 31, 2013	Jan. 31, 2013
In Thousands, unless otherwise specified
Level 1	'	'
Fair Value Measurements	'	'
Money market funds	$325,964	$250,810
Assets:	'	'
Total	325,964	250,810
Level 2	'	'
Fair Value Measurements	'	'
Money market funds	0	0
Assets:	'	'
Total	0	0
Level 3	'	'
Fair Value Measurements	'	'
Money market funds	0	0
Assets:	'	'
Total	0	0
Total	'	'
Fair Value Measurements	'	'
Money market funds	325,964	250,810
Assets:	'	'
Cash and cash equivalents	325,964	250,810
Total	$325,964	$250,810

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Commitments and Contingencies Disclosure [Abstract]	'	'	'	'
Rent expense	$1.90	$0.90	$4.30	$2.60

Property_and_Equipment_Details

Property and Equipment (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013
Property, Plant and Equipment [Line Items]	'	'	'	'	'
Property and equipment, gross	$30,646,000	'	$30,646,000	'	$22,920,000
Less: accumulated depreciation and amortization	-16,209,000	'	-16,209,000	'	-9,715,000
Property and equipment, net	14,437,000	'	14,437,000	'	13,205,000
Depreciation and amortization expense	3,600,000	1,200,000	6,500,000	3,400,000	'
Impairment of long-lived assets	'	'	2,128,000	0	'
Computer equipment and software	'	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'	'
Property and equipment, gross	18,860,000	'	18,860,000	'	16,077,000
Furniture and fixtures	'	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'	'
Property and equipment, gross	4,144,000	'	4,144,000	'	2,714,000
Leasehold improvements	'	'	'	'	'
Property, Plant and Equipment [Line Items]	'	'	'	'	'
Property and equipment, gross	$7,642,000	'	$7,642,000	'	$4,129,000

Acquisition_Details

Acquisition (Details) (USD $)	0 Months Ended
	Sep. 25, 2013	Oct. 31, 2013	Jan. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Purchase price paid in cash	$9,000,000	'	'
Identifiable intangible assets	4,700,000	'	'
Net deferred tax liability	700,000	'	'
Net liabilities assumed	700,000	'	'
Goodwill	'	5,734,000	0
Identifiable intangible assets acquired	4,730,000	'	'
Developed Technology	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Identifiable intangible assets acquired	2,940,000	'	'
Identifiable intangible assets, useful life	'36 months	'	'
Customer Relationships	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Identifiable intangible assets acquired	1,460,000	'	'
Identifiable intangible assets, useful life	'36 months	'	'
Other acquired intangible assets	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'
Identifiable intangible assets acquired	$330,000	'	'
Identifiable intangible assets, useful life	'24 months	'	'

Debt_Financing_Facilities_Deta

Debt Financing Facilities (Details) (Revolving line of credit facility, USD $)	Oct. 31, 2013	9-May-13	Oct. 31, 2013
			London Interbank Offered Rate (LIBOR)
Debt Financing Facilities	'	'	'
Maximum borrowing capacity	'	$25,000,000	'
Prime rate	3.25%	'	'
Basis spread on variable rate	'	'	2.75%
Amount outstanding	$0	'	'

Convertible_Preferred_Stock_De

Convertible Preferred Stock (Details) (Warrants to purchase convertible preferred stock, USD $)	3 Months Ended
In Millions, unless otherwise specified	Apr. 30, 2012
Fair value of the preferred stock warrant liability	'
Expense arising from revaluation	$14.10
Assumptions used to estimate the value of the preferred stock warrants	'
Dividend yield (as a percent)	0.00%
Minimum	'
Assumptions used to estimate the value of the preferred stock warrants	'
Expected volatility (as a percent)	49.70%
Risk-free rate (as a percent)	0.50%
Expected term	'3 years 4 months 17 days
Maximum	'
Assumptions used to estimate the value of the preferred stock warrants	'
Expected volatility (as a percent)	53.20%
Risk-free rate (as a percent)	1.40%
Expected term	'6 years 3 months 18 days

Stock_Compensation_Plans_Detai

Stock Compensation Plans (Details)	9 Months Ended
	Oct. 31, 2013
Available for Grant	'
Balances at the beginning of the period (in shares)	7,867,788
Additional Shares Authorized (in shares)	5,046,017
Options forfeited and expired (in shares)	332,772
RSUs granted (in shares)	-1,757,335
Shares withheld related to net share settlement of RSUs	48,731
RSU's forfeited (in shares)	202,793
Balances at the end of the period (in shares)	11,740,766

Stock_Compensation_Plans_Detai1

Stock Compensation Plans (Details 2) (USD $)	9 Months Ended		12 Months Ended
	Oct. 31, 2013		Jan. 31, 2013
Shares	'		'
Options forfeited and expired (in shares)	-332,772		'
Number of Shares	'		'
RSUs granted (in shares)	1,757,335		'
Shares withheld related to net share settlement of RSUs	48,731		'
RSUs forfeited (in shares)	-202,793		'
Options	'		'
Shares	'		'
Outstanding at the beginning of the period (in shares)	18,917,547		'
Options exercised (in shares)	-5,393,800		'
Options forfeited and expired (in shares)	-332,772		'
Outstanding at the end of the period (in shares)	13,190,975		18,917,547
Vested and expected to vest at the end of the period (in shares)	12,876,731		'
Exercisable at the end of the period (in shares)	6,906,089		'
Weighted-Average Exercise Price Per Share	'		'
Balances at the beginning of the period (in dollars per share)	$4.26		'
Options exercised (in dollars per share)	$3.50		'
Options forfeited (in dollars per share)	$6.60		'
Balances at the end of the period (in dollars per share)	$4.50		$4.26
Vested and expected to vest at the end of the period (in dollars per share)	$4.44		'
Exercisable at the end of the period (in dollars per share)	$2.23		'
Weighted-Average Remaining Contractual Term	'		'
Balances at the end of the period	'6 years 10 months 24 days		'
Vested and expected to vest at the end of the period	'6 years 10 months 13 days		'
Vested and exercisable at the end of the period	'5 years 10 months 21 days		'
Aggregate Intrinsic Value	'		'
Outstanding at the end of the period (in dollars)	$767,799,000	[1]	'	[1]
Vested and expected to vest at the end of the period (in dollars)	750,294,000	[1]	'
Vested and exercisable at the end of the period (in dollars)	417,684,000	[1]	'
Tax benefits	'		'
Tax benefits that have been realized from exercised stock options	300,000		'
Unrecognized compensation cost	'		'
Total unrecognized compensation cost related to stock options	21,500,000		'
Weighted-average period over which unrecognized compensation cost is expected to be recognized	'1 year 11 months 9 days		'
Additional disclosures	'		'
Total intrinsic value of options exercised (in dollars)	229,100,000		'
RSUs	'		'
Number of Shares	'		'
Balances at the beginning of the period (in shares)	2,904,707		'
RSUs granted (in shares)	1,757,335		'
RSUs vested (in shares)	-143,141		'
RSUs forfeited (in shares)	-202,793		'
Balances at the end of the period (in shares)	4,316,108		'
RSU's vested and expected to vest at the end of the period (in shares)	4,100,302.60		'
Unrecognized compensation cost	'		'
Weighted-average period over which unrecognized compensation cost is expected to be recognized	'3 years 3 months 11 days		'
Total unrecognized compensation cost	$123,000,000		'
Additional disclosures	'		'
Weighted-average grant date fair value of RSUs granted (in dollars per share)	$47.60		'
[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 OctoberB 31, 2013.

Geographic_Information_Details

Geographic Information (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Revenues by geographic region	'	'	'	'
Total revenues	$78,633	$52,045	$202,713	$133,719
United States	'	'	'	'
Revenues by geographic region	'	'	'	'
Revenue	61,844	41,989	159,599	107,580
International	'	'	'	'
Revenues by geographic region	'	'	'	'
Revenue	$16,789	$10,056	$43,114	$26,139

Geographic_Information_Details1

Geographic Information (Details 2) (USD $)	Oct. 31, 2013	Jan. 31, 2013
In Thousands, unless otherwise specified
Property and Equipment by Geographic Area	'	'
Property and equipment, net	$14,437	$13,205
United States	'	'
Property and Equipment by Geographic Area	'	'
Property and equipment	12,941	11,471
International	'	'
Property and Equipment by Geographic Area	'	'
Property and equipment	$1,496	$1,734

Geographic_Information_Geograp

Geographic Information Geographic Information Narrative (Details)	3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Oct. 31, 2013	Oct. 31, 2013	Jan. 31, 2013	Oct. 31, 2013
	Customer concentration risk	Customer concentration risk	Customer concentration risk	United Kingdom
	Revenues [Member]	Accounts receivable	Accounts receivable	Geographic concentration
	customer	customer	customer	Property and equipment
				country
Concentration Risk [Line Items]	'	'	'	'
Number of countries	'	'	'	1
Number of customers accounting for 10 percent or more of the concentration risk	1	1	1	'
Concentration risk, percentage	16.00%	23.00%	31.00%	10.00%

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Income Tax Disclosure [Abstract]	'	'	'	'
Income tax expense (benefit)	($500)	$125	$269	$438

Net_Loss_Per_Share_Details

Net Loss Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012
Numerator	'	'	'	'
Net loss	($16,550)	($5,474)	($46,377)	($30,519)
Denominator:	'	'	'	'
Weighted-average common shares outstanding (in shares)	106,079	96,786	104,144	74,210
Less: Weighted-average unvested common shares subject to repurchase or forfeiture (in shares)	-71	-115	-81	-259
Weighted-average shares used to compute net loss per share, basic and diluted (in shares)	106,008	96,671	104,063	73,951
Net loss per share	'	'	'	'
Net loss per share, basic and diluted (in dollars per share)	($0.16)	($0.06)	($0.45)	($0.41)

Net_Loss_Per_Share_Details_2

Net Loss Per Share (Details 2)	9 Months Ended
In Thousands, unless otherwise specified	Oct. 31, 2013	Oct. 31, 2012
Potentially dilutive securities	'	'
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	17,803	23,617
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)	13,191	22,190
Shares subject to outstanding RSUs	'	'
Potentially dilutive securities	'	'
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	4,316	399
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)	296	623
Shares subject to common stock warrants	'	'
Potentially dilutive securities	'	'
Potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive (in shares)	0	405

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	3 Months Ended		9 Months Ended
	Oct. 31, 2013	Oct. 31, 2012	Oct. 31, 2013	Oct. 31, 2012	Jan. 31, 2013
Related Party Transactions [Abstract]	'	'	'	'	'
Revenue from sales to the related party	$600,000	$500,000	$1,800,000	$1,400,000	'
Expenses related to purchases from the related party	300,000	200,000	900,000	600,000	'
Accounts receivable from the related party	0	'	0	'	0
Accounts payable to related parties	$0	'	$0	'	$0

Subsequent_Event_Details

Subsequent Event (Details) (Cloudmeter, Subsequent Event, USD $)	0 Months Ended
In Millions, unless otherwise specified	Dec. 06, 2013
Cloudmeter | Subsequent Event	'
Subsequent Event [Line Items]	'
Business combination, cash paid	$21