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 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 2016 , for example, refer to the fiscal year ended January 31, 2016 . Follow-on Offering In January 2014, we closed a follow-on offering of 6,900,000 shares of common stock, including 900,000 shares of common stock from the full exercise of the overallotment option of shares granted to the underwriters. The public offering price of the shares sold in the offering was $81.00 per share. The total gross proceeds from the offering to us were $558.9 million . After deducting underwriting discounts and commissions of $19.6 million , we received approximately $539.3 million . 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 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 their 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 the consolidated statement of stockholders’ equity. Foreign currency transaction gains and losses are included in Other income (expense), net and were not material for the three years ended January 31, 2016 . All assets and liabilities denominated in a foreign currency are translated into U.S. dollars at the exchange rate on the balance sheet date. Expenses are translated at the average exchange rate during the period. Equity transactions are translated using historical exchange rates. Foreign Currency Contracts In the first quarter of fiscal 2016, we began to use foreign currency forward contracts as a part of our strategy to manage exposure related to foreign currency denominated monetary assets and liabilities. These contracts typically have maturities of one month. They are not designated as cash flow or fair value hedges under ASC Topic 815, Derivatives and Hedging. These contracts hedge assets and liabilities that are denominated in foreign currencies and are carried at fair value as either assets or liabilities on the consolidated balance sheets with changes in the fair value recorded to Other income (expense), net in the consolidated statements of operations. Business Combinations We use our best estimates and assumptions to allocate the fair value of purchase consideration to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the fair value of purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. Our estimates are inherently uncertain and subject to refinement. During the measurement period, which may be up to one year from the acquisition date, we may record adjustments to the fair value of these tangible and intangible assets acquired and liabilities assumed, with the corresponding offset to goodwill. In addition, uncertain tax positions and tax-related valuation allowances are initially established in connection with a business combination as of the acquisition date. We continue to collect information and reevaluate these estimates and assumptions quarterly and record any adjustments to our preliminary estimates to goodwill provided that we are within the measurement period. Upon the conclusion of the final determination of the fair value of assets acquired or liabilities assumed during the measurement period, any subsequent adjustments are recorded to our consolidated statements of operations. Revenue Recognition We generate revenues primarily in the form of software license fees and related maintenance and services fees. License fees include perpetual license fees, term license fees and royalties. Maintenance and services primarily consist of fees for maintenance services (including support and unspecified upgrades and enhancements when and if they are available), training, professional services that are not essential to functionality and subscription software services. We recognize revenues when all of the following conditions are met: • there is persuasive evidence of an arrangement; • the software or services have been delivered to the customer; • the amount of fees to be paid by the customer is fixed or determinable; and • the collection of the related fees is probable. Signed agreements are used as evidence of an arrangement. If a contract signed by the customer does not exist, we use a purchase order as evidence of an arrangement. In cases where both a signed contract and a purchase order exist, we consider the signed contract to be the final persuasive evidence of an arrangement. Electronic delivery occurs when we provide the customer with access to the software via a license key. We assess whether a fee is fixed or determinable at the outset of the arrangement, primarily based on the payment terms associated with the transaction. We do not generally offer extended payment terms with typical terms of payment due between 30 and 60 days from delivery of software. We assess collectability of the fee based on a number of factors such as collection history and creditworthiness of the customer. If we determine that collectability is not probable, revenue is deferred until collectability becomes probable, generally upon receipt of cash. When contracts contain software-related multiple elements wherein vendor specific objective evidence (“VSOE”) exists for all undelivered elements and the services, if any, are not essential to the functionality of the delivered elements, we account for the delivered elements in accordance with the “Residual Method.” Perpetual license arrangements are typically accompanied by maintenance agreements. Maintenance revenues consist of fees for providing software updates on a when-and-if-available basis and technical support for software products for an initial term. Maintenance revenues are recognized ratably over the term of the agreement. We have established fair value for maintenance on perpetual licenses due to consistently priced standalone sales of maintenance. Revenues related to term license fees are recognized ratably over the contract term beginning on the date the customer has access to the software license key and continuing through the end of the contract term. In these cases, we do not have VSOE of fair value for maintenance, as fees for support and maintenance are bundled with the license over the entire term of the contract. License arrangements may also include professional services and training services, which are typically delivered early in the contract term. In determining whether professional services revenues should be accounted for separately from license revenues, we evaluate whether the professional services are considered essential to the functionality of the software using factors such as the nature of our software products; whether they are ready for use by the customer upon receipt; the nature of our implementation services, which typically do not involve significant customization to or development of the underlying software code; the availability of services from other vendors; whether the timing of payments for license revenues is coincident with performance of services; and whether milestones or acceptance criteria exist that affect the realizability of the software license fee. Substantially all of our professional services arrangements are billed on a time and materials basis and, accordingly, are recognized as the services are performed. Training revenues are recognized as training services are delivered. VSOE of fair value of professional and training services is based upon stand-alone sales of those services. Payments received in advance of services performed are deferred and recognized when the related services are performed. We are unable to establish VSOE of fair value for all undelivered elements in certain multiple element arrangements due to the lack of VSOE for maintenance services that are generally bundled with term licenses. In these instances, all revenue is recognized ratably over the period that the services are expected to be performed, commencing when all service periods have started. In arrangements where the expected service periods of maintenance services and professional or training services differ, we recognize all revenue over the longer of the expected service periods, which is generally the maintenance period. We do not offer credits or refunds and therefore have not recorded any sales return allowance for any of the periods presented. Upon a periodic review of outstanding accounts receivable, amounts that are deemed to be uncollectible are written off against the allowance for doubtful accounts. Our policy is to record revenues net of any applicable sales, use or excise taxes. We recognize revenues from the indirect sales channel upon sell-through by the partner or distributor. Sell-through is determined when we receive an order form from a reseller for a specific end-user sale. We do not offer right of return, product rotation or price protection to any of our channel partners. We also have licensing arrangements with OEM customers for which royalty fees are generally recognized as revenue upon receipt of reports of units shipped, respectively. Provided all other revenue criteria are met, the upfront, minimum, non-refundable license fees from OEM customers are recognized upon delivery, and on-going royalty fees are recognized upon reports of units shipped. In our consolidated statements of operations, revenues are categorized as license or maintenance and services revenues. We allocate revenues from arrangements containing multiple elements to each of these categories based on the VSOE of fair value for elements in each revenue arrangement and the application of the residual method for arrangements in which we have established VSOE of fair value for all undelivered elements. In arrangements where we are not able to establish VSOE of fair value for all undelivered elements, we first allocate revenues to any undelivered elements for which VSOE of fair value has been established, then allocate revenues to any undelivered elements for which VSOE of fair value has not been established based upon management’s best estimate of fair value of those undelivered elements and apply a residual method to determine the license fee. Management’s best estimate of fair value of undelivered elements for which VSOE of fair value has not been established is based upon the VSOE of similar offerings and other objective criteria. For multiple-element arrangements containing our non-software services, we: (1) determine whether each element constitutes a separate unit of accounting; (2) determine the fair value of each element using the selling price hierarchy of VSOE of selling price, third-party evidence (“TPE”) of selling price or best-estimated selling price (“BESP”), as applicable; and (3) allocate the total price to each separate unit of accounting based on the relative selling price method. An element constitutes a separate unit of accounting when the delivered item has standalone value and delivery of the undelivered element is probable and within our control. We determine BESP by considering our overall pricing objectives and market conditions. Significant pricing practices taken into consideration include our discounting practices, the size and volume of our transactions, our price lists, our go-to-market strategy, historical standalone sales and contract prices. As our go-to-market strategies evolve, we may modify our pricing practices in the future, which could result in changes in relative selling prices, including both VSOE and BESP. For multiple-element arrangements that contain both software and non-software elements, we allocate revenue to software or software-related elements as a group and any non-software elements separately based on the selling price hierarchy. We determine the selling price for each deliverable using VSOE of selling price, if it exists, or TPE of selling price. If neither VSOE nor TPE of selling price exist for a deliverable, we use BESP. Once revenue is allocated to software or software-related elements as a group, we recognize revenue in conformance with software revenue accounting guidance. Revenue is recognized when revenue recognition criteria are met for each element. In our subscription software services agreements, we include service level commitments to customers relating to levels of uptime availability and permitting those customers to receive credits in the event that we fail to meet those levels. To date, we have not incurred any material costs as a result of such commitments and have not accrued any liabilities related to such obligations in the accompanying consolidated financial statements. Deferred revenue consists substantially of amounts invoiced in advance of revenue recognition for our products and services described above. We recognize deferred revenue as revenue only when the revenue recognition criteria are met. Cash and Cash Equivalents We consider all highly liquid instruments with original or remaining maturities of 90 days or less at the date of purchase to be cash equivalents. Cash and cash equivalents are recorded at cost, which approximates fair value. We do not hold or issue financial instruments for trading purposes. As of January 31, 2016 , 2015 and 2014 , $374.6 million , $374.7 million and $864.0 million , respectively, of cash and cash equivalents were invested in money market funds. Investments We determine the appropriate classification of our investments at the time of purchase and reevaluate such determination at each balance sheet date. Securities are classified as available-for-sale and are carried at fair value, with the change in unrealized gains and losses, net of tax, reported as a separate component on the consolidated statements of comprehensive income (loss). Fair value is determined based on quoted market rates when observable or utilizing data points that are observable, such as quoted prices, interest rates and yield curves. Declines in fair value judged to be other-than-temporary on securities available for sale are included as a component of investment income. In order to determine whether a decline in value is other-than-temporary, we evaluate, among other factors, the duration and extent to which the fair value has been less than the carrying value and our intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. The cost of securities sold is based on the specific-identification method. Interest on securities classified as available-for-sale is included as a component of Interest income, net. Concentration of Risk Financial instruments that potentially subject us to significant concentrations of credit risk consist principally of cash and cash equivalents, investments and accounts receivable. We maintain the majority of our cash balance at two financial institutions that management believes are high-credit, quality financial institutions and invest our cash equivalents in highly rated money market funds. At January 31, 2016 , one channel partner represented 26% and one customer represented 16% of total accounts receivable. At January 31, 2015 no channel partners or customers represented greater than 10% of total accounts receivable. Our accounts receivable is subject to collection risks. Our gross accounts receivable is reduced for this risk by an allowance for doubtful accounts. This allowance is for estimated losses resulting from the inability of our customers to make required payments. It is an estimate and is regularly evaluated for adequacy by taking into consideration a combination of factors. We look at factors such as past collection experience, credit quality of the customer, age of the receivable balance, and current economic conditions. These factors are reviewed to determine whether an allowance for bad debts should be recorded to reduce the receivable balance to the amount believed to be collectible. The following table presents the changes in the allowance for doubtful accounts (in thousands): Fiscal Year Ended January 31, (in thousands) 2016 2015 2014 Balance at beginning of period $ 473 $ 758 $ 821 Add: bad debt expense 98 — 140 Less: write-offs, net of recoveries (40 ) (285 ) (203 ) Balance at end of period $ 531 $ 473 $ 758 Goodwill, Intangible Assets, Long-Lived Assets and Impairment Assessments Goodwill and indefinite-lived intangible assets are carried at cost and are evaluated annually for impairment, or more frequently if circumstances exist that indicate that impairment may exist. When conducting our annual goodwill impairment assessment, we perform a quantitative evaluation of whether goodwill is impaired using the two-step impairment test. The first step is comparing the fair value of our reporting unit to its carrying value. We consider the enterprise to be the reporting unit for this analysis. If step one indicates that impairment potentially exists, the second step is performed to measure the amount of impairment, if any. We record the amount by which the carrying value of the goodwill exceeds its implied fair value, if any, as impairment. Finite-lived intangible assets are amortized over their useful lives. Each period we evaluate the estimated remaining useful life of our finite-lived intangible assets and whether events or changes in circumstances warrant a revision to the remaining period of amortization. The carrying amounts of these assets are periodically reviewed for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. Recoverability of these assets is measured by comparison of the carrying amount of each asset to the future undiscounted cash flows the asset is expected to generate. If the undiscounted cash flows used in the test for recoverability are less than the carrying amount of these assets, then the carrying amount of such assets is reduced to fair value. In-process research and development is initially capitalized at fair value as an intangible asset with an indefinite life and assessed for impairment thereafter. When in-process research and development projects are completed, the corresponding amount is reclassified as an amortizable intangible asset and is amortized over the asset’s estimated useful life. We evaluate the recoverability of our long-lived assets including intangible and tangible assets. Acquired finite-lived intangible assets are amortized over their useful lives. We evaluate long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying value of these assets may not be recoverable. We recognize such impairment in the event the net book value of such assets exceeds their fair value. If the fair value of the long-lived assets exceeds the carrying value of the net assets assigned, then the assets are not impaired and no further testing is performed. If the carrying value of the net assets assigned exceeds the fair value of the assets, then we must perform the second step of the impairment test in order to determine the implied fair value. During fiscal 2014, we recognized 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 Splunk Storm available to customers at no cost. Property and Equipment Property and equipment are stated at cost net of accumulated depreciation. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets ranging from generally three to five years. Leasehold improvements are amortized over the shorter of the estimated useful life or the remaining lease term. When assets are retired or disposed of, the cost and accumulated depreciation are removed from the accounts, and any resulting gains or losses are included in the consolidated statements of operations. Maintenance and repairs that do not improve or extend the lives of the respective assets are charged to expense in the period incurred. The following table presents the estimated useful lives of our property and equipment: Useful Life Computer equipment and software 3 years Furniture and fixtures 5 years Leasehold improvements Shorter of the useful life of the asset or the lease term Capitalized Software Development Costs Capitalization of software development costs for software to be sold, leased, or otherwise marketed begins upon the establishment of technological feasibility, which is generally the completion of a working prototype that has been certified as having no critical bugs and is a release candidate. Amortization begins once the software is ready for its intended use, generally based on the pattern in which the economic benefits will be consumed. We did not capitalize any internal software development costs for fiscal 2016 and 2015 because the cost incurred and the time between technological feasibility and product release was insignificant. We had no amortization expense from capitalized purchased technology during fiscal 2016 , 2015 or 2014 . Costs related to software acquired, developed or modified solely to meet our internal requirements, with no substantive plans to market such software at the time of development, are capitalized. Costs incurred during the preliminary planning and evaluation stage of the project and during post implementation operational stage are expensed as incurred. Costs incurred during the application development stage of the project are capitalized. We define the design, configuration, and coding process as the application development stage. We did not capitalize any costs related to computer software developed for internal use in fiscal 2016 or 2015 . During the third quarter of fiscal 2014, we recognized a $2.1 million impairment charge for the remaining balance of the previously capitalized Storm software development costs as a result of our decision to make Splunk Storm available to customers at no cost. Commissions Commissions are recorded as a component of sales and marketing expenses and consist of the variable compensation paid to our sales force. Sales commissions are earned and recorded at the time that a customer has entered into a binding purchase agreement. Commissions paid to sales personnel are recoverable only in the case that we cannot collect the invoiced amounts associated with a sales order. Commission expense was $88.5 million , $61.0 million and $54.0 million for fiscal 2016 , 2015 and 2014 , respectively. Leases We primarily lease our facilities under operating leases. For leases that contain rent escalation or rent concession provisions, we record the total rent expense during the lease term on a straight-line basis over the term of the lease. We record the difference between the rent paid and the straight-line rent expense as a current and non-current deferred rent liability in Accrued expenses and other liabilities and Other liabilities, non-current, respectively, on the consolidated balance sheets. Rent expense was $12.8 million , $10.5 million and $6.4 million during fiscal 2016 , 2015 and 2014 , respectively. Advertising Expense We expense advertising costs as incurred. We incurred $13.3 million , $8.4 million and $6.3 million in advertising expenses for fiscal 2016 , 2015 and 2014 , respectively. Advertising costs are recorded in sales and marketing expenses in the consolidated statements of operations. Stock-Based Compensation We recognize compensation expense for all share-based payment awards, including stock options, restricted stock units (“RSUs”), performance units (“PSUs”) and restricted stock awards (“RSAs”), based on the estimated fair value of the award on the grant date in the consolidated statements of operations over the related vesting periods. The expense recorded is based on awards ultimately expected to vest and therefore is reduced by estimated forfeitures. Forfeitures are estimated at the time of grant and revised, if necessary, in subsequent periods if actual forfeitures differ from those estimates. We calculate the fair value of options using the Black-Scholes method and expense using the straight-line attribution approach. We account for equity awards issued to non-employees, such as consultants, in accordance with the guidance relating to equity instruments that are issued to other than employees for acquiring, or in conjunction with selling, goods or services, using the Black-Scholes method to determine the fair value of such instruments. Awards granted to non-employees are remeasured over the vesting period, and the resulting value is recorded as an expense over the period the services are received. The fair value of each option grant and stock purchase right granted under the Employee Stock Purchase Plan (“ESPP”) was estimated on the date of grant using the Black-Scholes option pricing model. We recognize stock-based compensation expense related to our ESPP on a straight-line basis over the offering period, which is twelve months. Stock-based compensation expense is recognized net of estimated forfeiture activity. The determination of the grant date fair value of options using an option-pricing model is affected by assumptions regarding a number of other complex and subjective variables, which include our expected stock price volatility over the expected term of the options, stock option exercise and cancellation behaviors, risk-free interest rates and expected dividends. The number of PSUs earned and eligible to vest will be determined 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. Income Taxes Income taxes are accounted for under the asset and liability method in accordance with authoritative guidance for income taxes. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax basis and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. The guidance on accounting for uncertainty in income taxes requires us to identify, evaluate and measure all uncertain tax positions taken or to be taken on tax returns and to record liabilities for the amount of these positions that may not be sustained, or may only partially be sustained, upon examination by the relevant taxing authorities. Although we believe that our estimates and judgments were reasonable, actual results may differ from these estimates. Some or all of these judgments are subject to review by the taxing authorities. Recently Issued Accounting Pronouncements 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 both financing and operating leases in the consolidated balance sheets but recognize the impact on the consolidated statement of operations and cash flows 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 adoption methods and whether this standard will have a material impact on our consolidated financial statements. In January 2016, the FASB issued ASU No. 2016-01 (Subtopic 825-10), Recognition and Measurement of Financial Assets and Financial Liabilities. The ASU requires all equity investments, except those accounted for under the equity method of accounting or resulting in consolidation, to be measured at fair value with changes in fair value recognized in net income. The ASU also simplifies the impairment assessment for equity investments without readily determinable fair values, amends the presentation requirements for changes in the fair value of financial liabilities, requires presentation of financial instruments by measurement category and form of financial asset, and eliminates the requirement to disclose the methods and significant assumptions used in estimating the fair value of financial instruments. The standard is effective for our first quarter of fiscal 2019. We are currently evaluating adoption methods and whether this standard will have a material impact on our consolidated financial statements. In November 2015, the FASB issued ASU No. 2015-17 (Topic 740), Balance Sheet Classification of Deferred Taxes, which eliminates the current requirement for an entity to separate deferred income tax liabilities and assets into current and non-current amounts in the consolidated balance sheets. To simplify the presentation of deferred income taxes, the amendments in this ASU require that current deferred tax liabilities and assets, including the corresponding valuation allowance, be classified as non-current in the consolidated balance sheets. The standard is effective for us for our first quarter of fiscal 2018, although early adoption is permitted. We early adopted this standard during our fourth quarter of fiscal year 2016 on a prospective basis. Prior periods were not |