Mobileiron 10-Q 29 Jul 16 2016 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2016	Jul. 25, 2016
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q2
Entity Registrant Name	MOBILEIRON, INC.
Entity Central Index Key	1,470,099
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		85,714,533

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 41,535	$ 47,234
Short-term investments	43,622	49,576
Accounts receivable, net of allowance for doubtful accounts of $506 and $628 at June 30, 2016 and December 31, 2015 respectively	35,233	42,674
Prepaid expenses and other current assets	7,016	4,809
Total current assets	127,406	144,293
Long-term investments	755	2,094
Property and equipment-net	6,390	6,572
Intangible assets-net	953	1,261
Goodwill	5,475	5,475
Other assets	1,400	1,419
TOTAL ASSETS	142,379	161,114
Current liabilities:
Accounts payable	2,452	2,551
Accrued expenses	16,866	19,196
Deferred revenue-current	56,893	55,978
TOTAL CURRENT LIABILITIES	76,211	77,725
Long-term liabilities:
Deferred revenue-noncurrent	15,594	13,897
Other long-term liabilities	1,902	1,353
TOTAL LIABILITIES	93,707	92,975
Commitments and contingencies (Note 11)
Stockholders' equity:
Common stock, $0.0001 par value, 300,000,000 shares authorized, 85,654,690 shares and 81,326,237 shares issued and outstanding at June 30, 2016 and December 31, 2015, respectively	9	8
Additional paid-in capital	366,249	343,336
Accumulated deficit	(317,586)	(275,205)
TOTAL STOCKHOLDERS' EQUITY	48,672	68,139
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 142,379	$ 161,114

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)	Jun. 30, 2016	Dec. 31, 2015
Statement Of Financial Position [Abstract]
Accounts receivable allowances	$ 506,000	$ 628,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	85,654,690	81,326,237
Common stock, shares outstanding	85,654,690	81,326,237

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue
Perpetual license	$ 9,783	$ 12,347	$ 20,151	$ 24,406
Subscription	14,803	11,217	29,426	21,414
Software support and services	14,295	11,193	27,311	22,431
Total revenue	38,881	34,757	76,888	68,251
Cost of revenue
Perpetual license	629	627	1,488	1,226
Subscription	2,199	1,688	3,982	3,427
Software support and services	5,289	4,254	9,917	8,411
Total cost of revenue	8,117	6,569	15,387	13,064
Gross profit	30,764	28,188	61,501	55,187
Operating expenses:
Research and development	18,019	14,899	34,946	28,400
Sales and marketing	27,246	29,037	52,914	54,842
General and administrative	8,265	9,105	15,813	17,503
Total operating expenses	53,530	53,041	103,673	100,745
Operating loss	(22,766)	(24,853)	(42,172)	(45,558)
Other (income) expense - net	(30)	16	(165)	138
Loss before income taxes	(22,736)	(24,869)	(42,007)	(45,696)
Income tax expense	198	144	374	277
Net loss	$ (22,934)	$ (25,013)	$ (42,381)	$ (45,973)
Net loss per share, basic and diluted	$ (0.27)	$ (0.32)	$ (0.50)	$ (0.59)
Weighted-average shares used to compute net loss per share, basic and diluted	85,317	78,198	84,151	77,599

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - 6 months ended Jun. 30, 2016 - USD ($) $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Total
BALANCE at Dec. 31, 2015	$ 8	$ 343,336	$ (275,205)	$ 68,139
BALANCE, Shares at Dec. 31, 2015	81,326,237
Issuance of common stock for stock option exercises, net of repurchases		439		$ 439
Issuance of common stock for stock option exercises, net of repurchases, Shares	277,597			277,597
Vesting of early exercised stock options		26		$ 26
Vesting of early exercised stock options, Shares	7,440
Issuance of common stock pursuant to the Employee Stock Purchase Plan		2,579		2,579
Issuance of common stock pursuant to the Employee Stock Purchase Plan, Shares	951,226
Issuance of common shares pursuant to the Employee Stock-Settled Bonus Plan	$ 1	5,638		5,639
Issuance of common stock shares pursuant to the Employee Stock-Settled Bonus Plan, shares	1,653,371
Vesting of restricted stock units, Shares	1,438,819
Stock-based compensation		14,231		14,231
Net loss			(42,381)	(42,381)
BALANCE at Jun. 30, 2016	$ 9	$ 366,249	$ (317,586)	$ 48,672
BALANCE, Shares at Jun. 30, 2016	85,654,690

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (42,381)	$ (45,973)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	18,794	11,088
Depreciation	1,681	1,253
Amortization of intangible assets	308	447
Provision for doubtful accounts		150
Accretion of investment securities	53	151
Changes in operating assets and liabilities:
Accounts receivable	7,441	2,489
Other current and noncurrent assets	(2,188)	(2,050)
Accounts payable	453	1,232
Accrued expenses and other long-term liabilities	(445)	(3,457)
Deferred revenue	2,612	7,067
Net cash used in operating activities	(13,672)	(27,603)
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property and equipment	(2,052)	(2,027)
Proceeds from maturities of investment securities	49,256	10,700
Purchase of investment securities	(42,016)	(46,359)
Net cash provided by (used in) investing activities	5,188	(37,686)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from Employee Stock Purchase Plan	2,342	3,325
Proceeds from exercise of stock options	443	3,416
Net cash provided by financing activities	2,785	6,741
NET CHANGE IN CASH AND CASH EQUIVALENTS	(5,699)	(58,548)
CASH AND CASH EQUIVALENTS-Beginning of period	47,234	104,287
CASH AND CASH EQUIVALENTS-End of period	41,535	45,739
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Cash paid for income taxes	471	137
SUPPLEMENTAL DISCLOSURES OF NONCASH FINANCING ACTIVITIES:
Value of shares issued under the 2015 Non-Executive Bonus Plan	5,639
Value of shares issued under the Employee Stock Purchase Plan	$ 2,579	$ 4,771

Description of Business and Sig

Description of Business and Significant Accounting Policies	6 Months Ended
	Jun. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business and Significant Accounting Policies	1. Description of Business and Significant Accounting Policies Description of Business MobileIron, Inc., and its wholly owned subsidiaries collectively, the “Company”, “we”, “us” or “our”, provides a purpose-built mobile IT platform that enables enterprises to manage and secure mobile applications, content and devices while providing their employees with device choice, privacy and a native user experience. We were incorporated in Delaware in July 2007 and are headquartered in Mountain View, California, with additional sales and support presence in North America, Europe, the Middle East, Asia and Australia. Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements as of June 30, 2016 and for the three and six months ended June 30, 2016 and 2015 have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial statements and pursuant to the rules and regulations of the Securities and Exchange Commission, or the SEC, and include the accounts of our wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. Certain information and footnote disclosures in this Form 10-Q normally included in annual financial statements prepared in accordance with U.S. GAAP and pursuant to the rules and regulations of the SEC have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary for a fair presentation of our balance sheet as of June 30 , 2016, our operating results for the three and six months ended June 30, 2016 and 2015, and our cash flows for the six months ended June 30 , 2016 and 2015. Our operating results for the three and six months ended June 30 , 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2016. The condensed consolidated balance sheet as of December 31, 2015 has been derived from the audited consolidated financial statements as of that date but does not include all the footnotes required by U.S. GAAP for complete financial statements. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with our audited financial statements and related notes thereto for the year ended December 31, 2015, included in our Annual Report on Form 10-K filed with the SEC on February 23, 2016. Foreign Currency Translation Our reporting currency is the U.S. dollar. The functional currency of all our international operations is the U.S. dollar. All monetary asset and liability accounts are translated into U.S. dollars at the period-end rate, nonmonetary assets and liabilities are translated at historical exchange rates, and revenue and expenses are translated at the weighted-average exchange rates in effect during the period. Translation adjustments arising are recorded as foreign currency gains (losses) in the consolidated statements of operations. We recognized a foreign currency loss of $89,000 and $83,000 for the three months ended June 30 , 2016 and 2015, respectively, and $47,000 and $257,000 for the six months ended June 30, 2016 and 2015, respectively, in other expense—net in our condensed consolidated statements of operations. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates include, but are not limited to, revenue recognition, stock-based compensation, stock-settled bonus expense, goodwill, intangible assets and accounting for income taxes. Actual results could differ from those estimates. Concentrations of Credit Risk Financial instruments that potentially subject us to a concentration of credit risk consist of cash, money market funds and fixed income investments. Although we deposit our cash with multiple financial institutions, our deposits, at times, exceed federally insured limits. We invest in fixed income securities that are of high-credit quality. Substantially all of our money market funds, or $20.5 million, are held in two funds that are rated “AAA.” We generally do not require collateral or other security in support of accounts receivable. Allowances are provided for individual accounts receivable when we become aware of a customer’s inability to meet its financial obligations, such as in the case of bankruptcy, deterioration of the customer’s operating results, or change in financial position. If circumstances related to customers change, estimates of the recoverability of receivables would be further adjusted. We also consider broader factors in evaluating the sufficiency of our allowances for doubtful accounts, including the length of time receivables are past due, significant one-time events and historical experience. As of June 30, 2016 and December 31, 2015 we have an allowance for doubtful accounts of $506,000 and $628,000 , respectively. One reseller accounted for 16% of total revenue ( 1% as an end customer) and for 17% of total revenue ( 1% as an end customer) for the three and six months ended June 30, 2016 , respectively, and for 17% of total revenue ( 1% as an end customer) and 18% of total revenue ( 1% as an end customer) for the three and six months ended June 30, 2015, respectively. The same reseller accounted for 18% and 14% of net accounts receivable as of June 30, 2016 and December 31, 2015 . There were no other resellers or end-us er customers that accounted for 10% or more as a percentage of our revenue or net accounts receivable for any period presented. Segments We have one reportable segment. Summary of Significant Accounting Policies Revenue Recognition We derive revenue principally from software-related arrangements consisting of perpetual software licenses, post-contract customer support for such licenses, or PCS or software support, including when and if available updates, and professional services such as consulting and training services. We also offer our software as term-based licenses and cloud-based arrangements. In addition, we install our software on hardware appliances that we ship to customers. We begin to recognize revenue when (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred or services have been provided, (iii) the sales price is fixed or determinable, and (iv) collection of the related receivable is probable. If collection is not considered probable, revenue is recognized only upon collection. Signed agreements, including by electronic acceptance, are used as evidence of an arrangement. Delivery is considered to occur when we provide a customer with a link and credentials to download our software. Delivery of a hardware appliance (an “appliance”) is considered to occur when title and risk of loss has transferred to the customer, which typically occurs when appliances are delivered to a common carrier. Delivery of services occurs when performed. In our vendor specific objective evidence, or VSOE , analysis, we generally include stand-alone sales transactions completed during a rolling 12 month period unless a shorter period is appropriate due to changes in our pricing structure. We typically enter into multiple-element arrangements with our customers in which a customer may purchase a combination of software on a perpetual or subscription license, PCS, and professional services. The professional services are not considered essential to the functionality of the software. All of these elements are considered separate units of accounting. Our standard agreements do not include rights for customers to cancel or terminate arrangements or to return software to obtain refunds. We use the residual method to recognize revenue when a perpetual license arrangement includes one or more elements to be delivered at a future date provided the following criteria are met: (i) VSOE of fair value does not exist for one or more of the delivered items but exists for all undelivered elements, (ii) all other applicable revenue recognition criteria are met and (iii) the fair value of all of the undelivered elements is less than the arrangement fee. VSOE of fair value is based on the normal pricing practices for those products and services when sold separately by us and contractual customer renewal rates for post-contract customer support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized as revenue in the period in which it was earned. If VSOE of fair value of one or more undelivered elements does not exist, then the revenue is deferred and recognized when delivery of those elements occurs, or when fair value can be established, or ratably over the PCS period if the only undelivered element is PCS—we refer to these deferred revenue elements as the “Deferred Portion.” Revenue from subscriptions to our on-premise term licenses, arrangements where perpetual and subscriptions to our on-premise term licenses are sold together, and subscriptions to our cloud service are recognized ratably over the contractual term for all periods presented and are included as a component of subscription revenue within our consolidated statements of operations. We refer to arrangements where perpetual and subscriptions to our on-premise term licenses are sold together as “Bundled Arrangements.” Occasionally, we enter into multiple-element arrangements with our customers in which a customer may purchase a combination of software on a perpetual or term basis, PCS, professional services, and appliances. We generally provide the appliances and software upon the commencement of the arrangement and provide software-related elements throughout the support period. We account for appliance-bundled arrangements under the revised accounting standard related to multiple-element arrangements, Accounting Standard Update, or ASU, No. 2009-13, Multiple Element Arrangements , and determine the revenue to be recognized based on the standard’s fair value hierarchy and then determine the value of each element in the arrangement based on the relative selling price of the arrangement. Amounts related to appliances are generally recognized upon delivery with the remaining consideration allocated to software and software-related elements, which are recognized as described elsewhere in this policy. Revenue from PCS is recognized ratably over the support term and is included as a component of software support and service revenue within the consolidated statements of operations. Revenue related to professional services is recognized upon delivery and is included as a component of software support and services revenue within the consolidated statements of operations. Appliance revenue was less than 10% of total revenue for all periods presented and is included as a component of perpetual license revenue within the consolidated statements of operations. Historically, sales made through resellers were fulfilled directly to the end users, and we recognized revenue when we delivered licenses to the end users and all other revenue recognition criteria were met. Over time, however, our business has evolved and some of our operators, system integrators and other resellers have requested that we deliver licenses to them. In those instances we recognize revenue at the time that we deliver to our resellers and all other revenue recognition criteria are met; such resellers have no rights of return or exchange. Shipping charges and sales tax billed to partners are excluded from revenue. Sales commissions and other incremental costs to acquire contracts are also expensed as incurred and are recorded in sales and marketing expense. For all arrangements, any revenue that has been deferred and is expected to be recognized beyond one year is classified as long-term deferred revenue in the consolidated balance sheets. Cash Equivalents We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. As of June 30, 2016 and December 31, 2015 cash and cash equivalents consist of cash deposited with banks, money market funds and investments that mature within three months of their purchase. Held-To-Maturity Investments We determine the appropriate classification of our fixed income investments at the time of purchase and reevaluate their classifications each reporting period. Investments are classified as held-to-maturity since the Company has positive intent and the ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. We recorded $113,000 and $66,000 o f interest income for the three months ended June 3 0 , 2016 and 2015 , respectively , and recorded $205,000 and $ 116,000 of interest income for the six months ended June 3 0 , 2016 and 2015 , respectively. Comprehensive Loss Comprehensive loss includes all changes in equity (net assets) during a period from non-owner sources. For the three and six months ended June 30, 2016 and 2015 , there were no differences between net loss and comprehensive loss. Therefore, the consolidated statements of comprehensive loss have been omitted. Net Loss per Share of Common Stock Basic net loss per common share is calculated by dividing the net loss by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common shares and potentially dilutive securities outstanding for the period determined using the treasury-stock and if-converted methods. For purposes of the diluted net loss per share calculation, unvested restricted stock and stock options are considered to be potentially dilutive securities. Because we have reported a net loss for the three and six months ended June 30, 2016 and 2015 , the number of shares used to calculate diluted net loss per common share is the same as the number of shares used to calculate basic net loss per common share for those periods presented because the potentially dilutive shares would have been anti-dilutive if included in the calculation. Inventory We have appliances (industry standard hardware servers available from multiple vendors) that are available for customers to purchase, on which we will install our software prior to shipment. Inventory is stated at the lower of cost or market value. We value our inventory using the first-in, first-out method. Appropriate consideration is given to obsolescence, excessive levels, deterioration and other factors in evaluating carrying value—such adjustments were not material for any period presented. The entire inventory is comprised of finished goods. As of June 30, 2016 and December 31, 2015 , we had inventory of $274,000 and $309,000 , respectively, which is included in prepaid expenses and other current assets in the consolidated balance sheets. Software Development Costs Incurred in Connection with Software to be Sold or Marketed The costs to develop new software products and enhancements to existing software products are expensed as incurred until technological feasibility has been established. We consider technological feasibility to have occurred when all planning, designing, coding and testing have been completed according to design specifications. Once technological feasibility is established, any additional costs would be capitalized. We believe our current process for developing software is essentially completed concurrent with the establishment of technological feasibility, and accordingly, no costs have been capitalized. Internal Use Software We capitalize costs incurred during the application development stage related to our internally used software. Such costs are primarily incurred by third party vendors and consultants. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Amounts capitalized in all periods presented were not significant. All software development costs incurred in connection with our cloud offering, or SaaS are also sold or marketed to partners or end customers, therefore we start capitalizing costs when technological feasibility is achieved. No costs were capitalized in any periods presented as we believe that our current process for developing software is essentially completed concurrent with the establishment of technological feasibility. Property and Equipment Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives, determined to be three years for computers and equipment and software, five years for furniture and fixtures, and the lesser of the remaining lease term or estimated useful life for leasehold improvements. Expenditures for repairs and software support are charged to expense as incurred. Upon disposition, the cost and related accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected as operating expenses in the consolidated statements of operations. Goodwill and Intangible Assets We record the excess of the acquisition purchase price over the fair value of the tangible and identifiable intangible assets acquired as goodwill. We perform an impairment test of our goodwill in the third quarter of our fiscal year, or more frequently if indicators of potential impairment arise. We have a single reporting unit and consequently evaluate goodwill for impairment based on an evaluation of the fair value of the Company as a whole. We record purchased intangible assets at their respective estimated fair values at the date of acquisition. Purchased intangible assets are being amortized using the straight-line method over their remaining estimated useful lives, which range from three to five years. We evaluate the remaining useful lives of intangible assets on a periodic basis to determine whether events or circumstances warrant a revision to the remaining estimated amortization period. Long-Lived Assets with Finite Lives Long-lived assets are reviewed for possible impairment whenever events or circumstances indicate that the carrying amount of these assets may not be recoverable. We evaluate the recoverability of each of our long-lived assets, including purchased intangible assets and property and equipment, by comparison of its carrying amount to the future undiscounted cash flows we expect the asset to generate. If we consider the asset to be impaired, we measure the amount of any impairment as the difference between the carrying amount and the fair value of the impaired asset. Stock-Based Compensation We use the estimated grant-date fair value method of accounting in accordance with Accounting Standards Codification, or ASC, Topic 718 Compensation—Stock Compensation . Fair value is determined using the Black-Scholes Model using various inputs, including our estimates of expected volatility, term and future dividends. We estimated the forfeiture rate for the three and six months ended June 30, 2016 based on our historical experience for annual grant years where the majority of the vesting terms have been satisfied. For stock options, restricted stock units or restricted stock grants with no performance condition, we recognize compensation costs on a straight-line basis over the requisite service period of the award, which is generally the vesting term of four years. Research and Development Research and development, or R&D, costs are charged to expense as incurred. Advertising Advertising costs are expensed and included in sales and marketing expense when incurred. Advertising expense for the three and six months ended June 30, 2016 and 2015 was not significant. Income Taxes We account for income taxes in accordance with ASC Topic 740, Income Taxes , under which deferred tax liabilities and assets are recognized for the expected future tax consequences of temporary differences between financial statement carrying amounts and the tax basis of assets and liabilities and net operating loss and tax credit carryforwards. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. We use a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. A tax position is recognized when it is more likely than not that the tax position will be sustained upon examination, including resolution of any related appeals or litigation processes. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority. The standard also provides guidance on derecognition of tax benefits, classification on the balance sheet, interest and penalties, accounting in interim periods, disclosure and transition. Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board, or FASB, or other standard setting bodies and adopted by us as of the specified effective date. Unless otherwise discussed, the impact of recently issued standards that are not yet effective will not have a material impact on our financial position or results of operations upon adoption. In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments, which introduces a model based on expected losses to estimate credit losses for most financial assets and certain other instruments. In addition, for available-for-sale debt securities with unrealized losses, the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. The standard is effective for annual reporting periods beginning after December 15, 2019, with early adoption permitted for annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions by recording a cumulative-effect adjustment to retained earnings. We are evaluating the impact of the adoption on our consolidated financial position, results of operations, cash flows and disclosures. In May 2014, the FASB, jointly with the International Accounting Standards Board, issued a comprehensive new standard on revenue recognition from contracts with customers. The standard’s core principle is that a reporting entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying this new guidance to contracts within its scope, an entity will: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies a performance obligation. Additionally, this new guidance will require significantly expanded disclosures about revenue recognition. As clarified by the FASB on July 9, 2015, provisions of this new standard are effective for annual reporting periods (including interim reporting periods within those annual periods) beginning after December 15, 2017. Early adoption is permitted for annual reporting periods (including interim reporting periods within those annual periods) beginning after December 15, 2016. Entities have the option of using either a full retrospective or a modified retrospective approach to adopt this new guidance. We are currently evaluating the potential effect on our consolidated financial statements from adoption of this standard. In February 2016, the FASB finalized the Accounting Standard Update, or ASU, 2016-02, “Leases”. ASU 2016-02 requires lessees to recognize the assets and liabilities on the balance sheet for the rights and obligations created by most leases (leases with the term of 12 months or longer) and continue to recognize expenses on the income statements over the lease term. It will also require disclosure designed to give financial statement users information on the amount, timing, and uncertainly of cash flows arising from leases. The guidance is effective for annual reporting periods beginning after December 15, 2018 and interim periods within those fiscal years. We are currently evaluating the effect of the standard on our consolidated financial statements and will adopt ASU 2016-02 effective January 1, 2019 . In March 2016, the FASB issued new Accounting Standard Update, or ASU, 2016-09, “ Improvements to Employee Share-Based Payment Accounting” . ASU 2016-09 simplifies several aspects of the accounting for employee share-based payment transactions including the accounting for income taxes, forfeitures, statutory tax withholding requirements and classification in the statement of cash flows. Under the new standard, excess tax benefits and tax deficiencies are to be recognized as income tax expense or benefit in the income statement and the excess tax benefits and tax deficiencies are considered discrete items in the reporting period they occur and are not included in the estimate of an entity’s annual effective tax rate. Excess tax benefits will be classified along with other cash flows related to income taxes as an operating activity. The ASU allows an entity to elect as an accounting policy either to continue to estimate the total number of awards that are expected to vest or account for forfeitures when they occur. The ASU modifies the current exception to liability classification of an award when an employer uses a net-settlement feature to withhold shares to meet the employer’s minimum statutory tax withholding requirement. The guidance is effective for annual reporting periods beginning after December 15, 2016 and interim periods within those fiscal years. We are currently evaluating the effect of the standard on our consolidated financial statements and intend to adopt ASU 2016-09 effective January 1, 2017.

Significant Balance Sheet Compo

Significant Balance Sheet Components	6 Months Ended
	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Significant Balance Sheet Components	2. Significant Balance Sheet Components Property and Equipment — Property and equipment at June 30, 2016 and December 31, 2015 consisted of the following (in thousands): June 30, 2016 December 31, 2015 Computers and appliances $ $ Purchased software Furniture and fixtures Leasehold improvements Total property and equipment Accumulated depreciation and amortization Total property and equipment—net $ $ Accrued Expenses — Accrued expenses at June 30, 2016 and December 31, 2015 consisted of the following (in thousands): June 30, 2016 December 31, 2015 Accrued commissions $ $ Accrued stock-settled bonus Accrued vacation Employee Stock Purchase Plan liability Other accrued payroll-related expenses Other accrued liabilities Total accrued expenses $ $ In July 2016, we initiated a reduction in our workforce to further align our cost structure with expected revenue growth and expect to pay approximately $800,000 in severance and severance-related costs, primarily in our third fiscal quarter of 2016. Deferred Revenue — Current and non-current deferred revenue at June 30, 2016 and December 31, 2015 consisted of the following (in thousands): June 30, 2016 December 31, 2015 Perpetual license $ $ Subscription Software support Professional services Total current and noncurrent deferred revenue $ $

Fair Value Measurement

Fair Value Measurement	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurement	3. Fair Value Measurement With the exception of our held-to-maturity fixed income investments, we report all financial assets and liabilities and nonfinancial assets and liabilities that are recognized or disclosed at fair value in the consolidated financial statements on a recurring basis in accordance with ASC 820. F air value is defined as the price that would be received from selling an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining the fair value measurements for assets and liabilities, which are required to be recorded at fair value, we consider the principal or most advantageous market in which we would transact and the market-based risk measurements or assumptions that market participants would use in pricing the asset or liability, such as inherent risk, transfer restrictions and credit risk. ASC 820 also establishes a fair value hierarchy, which prioritizes the inputs to valuation techniques used to measure fair value into three levels. A financial instrument’s categorization within the fair value hierarchy is based upon the lowest level of input that is available and significant to the fair value measurement. ASC 820 establishes and prioritizes three levels of inputs that may be used to measure fair value: — Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities. — Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs other than quoted prices that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments. — Level 3—Inputs are unobservable inputs based on our own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation. Our financial assets that are carried at fair value include cash and money market funds. We had no other financial liabilities, or nonfinancial assets and liabilities that were required to be measured at fair value on a recurring basis, or that were measured at fair value as of June 30, 2016 or December 31, 2015 . Our financial instruments measured at fair value as of June 30, 2016 and December 31, 2015 were as follows (in thousands): As of June 30, 2016 (in thousands) Level 1 Level 2 Level 3 Total Money market funds $ $ — $ — $ Corporate debt securities — — Commercial paper — — Securities and obligations of U.S. government agencies — — Total $ $ $ — $ As of December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Money market funds $ $ — $ — $ Corporate debt securities — — Commercial paper — — Securities and obligations of U.S. government agencies — — Total $ $ $ — $

Investments

Investments	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	4. Investments Our portfolio of fixed income securities consists of commercial paper, corporate debt securities and securities and obligations of U.S. government agencies. All our investments in fixed income securities are classified as held-to-maturity. These investments are carried at amortized cost. Our investments in fixed income securities as of June 30, 2016 and December 31, 201 5 were as follows: As of June 30, 2016 Amortized Fair (in thousands) cost Gains Losses Value Corporate debt securities $ $ $ $ Commercial paper — Securities and obligations of U.S. government agencies — Total $ $ $ $ As of December 31, 2015 Amortized Fair (in thousands) cost Gains Losses Value Corporate debt securities $ $ $ $ Commercial paper Securities and obligations of U.S. government agencies — Total $ $ $ $ The following table summarizes the balance sheet classification of our investments: As of June 30, As of December 31, (in thousands) 2016 2015 Cash equivalents $ $ Short-term investments Long-term investments Total investments $ $ The gross amortized cost and estimated fair value of our held-to-maturity investments by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties. As of June 30, 2016 As of December 31, 2015 Gross Gross Amortized Fair Amortized Fair (in thousands) Cost Value Cost Value Due in one year or less $ $ $ $ Due after one year through five years Total $ $ $ $ We monitor our investment portfolio for impairment on a periodic basis. In order to determine whether a decline in fair 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; our financial condition and business outlook, including key operational and cash flow metrics, current market conditions and future trends in our industry; our relative competitive position within the industry; and our intent and ability to retain the investment for a period of time sufficient to allow for any anticipated recovery in fair value. A decline in the fair value of the security below amortized cost that is deemed other-than-temporary is charged to earnings, resulting in the establishment of a new cost basis for the a ffected securities. In the six months ended June 30, 2016 , we had an insignificant amount of unrealized gains or losses, and we did not recognize any other-than-temporary impairments .

Goodwill and Intangibles

Goodwill and Intangibles	6 Months Ended
	Jun. 30, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangibles	5. Goodwill and Intangibles The following table reflects intangible assets subject to amortization as of June 30, 2016 and December 31, 2015 (in thousands): June 30, 2016 Gross Carrying Accumulated Net Book Amount Amortization Impairment Value Technology $ $ — $ Total $ $ $ — $ December 31, 2015 Gross Carrying Accumulated Net Book Amount Amortization Impairment Value Technology $ $ — $ Total $ $ $ — $ Amortization of the technology intangible assets was recorded in cost of revenue. The weighted average remaining life of our intangible assets on June 30, 2016 was 1.5 years. Estimated remaining intangible assets amortization expense for the next five fiscal years and thereafter is as follows (in thousands): Year 2016 (remaining) $ 2017 2018 2019 — 2020 — Total $ At June 30, 2016 and December 31, 2015 , the carrying value of goodwill was as follows (in thousands): Balance, December 31, 2015 $ Additions — Balance, June 30, 2016 $

Line of Credit

Line of Credit	6 Months Ended
	Jun. 30, 2016
Debt Disclosure [Abstract]
Line of Credit	6 . Line of Credit We have a $20.0 million revolving line of credit with a financial institution that c an be used to (a) borrow for working capital and general business requirements, (b) issue letters of credit, and (c) enter into foreign exchange contracts. Amounts borrowed accrue interest at a floating per annum rate equal to the prime rate. A default interest rate shall apply during an event of default at a rate per annum equal to 5% above the otherwise applicable interest rate. The line of credit is collateralized by substantially all of our assets, except intellectual property, and requires us to comply with working capital, net worth and other nonfinancial covenants, including limitations on indebtedness and restrictions on dividend distributions, among others, and the borrowing capacity is limited to eligible accounts receivable. We are required to maintain an adjusted quick ratio (defined as the ratio of current assets to current liabilities minus deferred revenue) of at least 1.25 . In May 2015, we issued a letter of credit for $1.5 million as a security deposit for a new Mountain View headquarters lease thereby reducing the borrowing capacity under our line of credit to $18.5 million. In July 2015, we amended our revolving line of credit and extended its maturity date to August 2017. There were no outstanding amounts under the line of credit at June 30, 2016 or December 31, 201 5 and we were in compliance with all financial covenants.

Preferred Stock

Preferred Stock	6 Months Ended
	Jun. 30, 2016
Temporary Equity Disclosure [Abstract]
Preferred Stock	7 . Preferred Stock We were authorized to issue up to 10,000,000 shares of convertible preferred stock as of June 30, 2016 and December 31, 2015. No shares of convertible preferred stock were issued and outstanding as of June 30, 2016 or December 31, 2015 .

Common Stock

Common Stock	6 Months Ended
	Jun. 30, 2016
Stockholders Equity Note [Abstract]
Common Stock	8 . Common Stock We were authorized to issue 300,000,000 shares of common stock with a par value of $0.0001 per share as of June 30, 2016 and December 31, 2015 . Each share of common stock is entitled to one vote. The holders of common stock are also entitled to receive dividends out of funds legally available therefore, when and if declared by the board of directors, subject to the approval and priority rights of holders of all classes of preferred stock outstanding. As of June 30, 2016 and December 31, 2015 , we reserved shares of common stock for issuance as follows: June 30, December 31, 2016 2015 Options outstanding Unvested restricted stock units outstanding Unvested early exercised stock options Shares available for grant under the 2014 Equity Incentive Plan and 2015 Inducement Plan Shares available for purchase under the Employee Stock Purchase Plan Total

Share Based Awards

Share Based Awards	6 Months Ended
	Jun. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share Based Awards	9. Share Based Awards 2008 Plan The 2008 Stock Plan, or 2008 Plan, which expired on June 12, 2014 , provided for the grant of incentive and nonstatutory stock options to employees, nonemployee directors and consultants of the Company. Options granted under the 2008 Plan generally become exercisable within three to four years following the date of grant and expire 10 years from the date of grant. When options are subject to our repurchase right, we may buy back any unvested shares at their original exercise price in the event of an employee’s termination prior to full vesting. Our 2008 Plan was terminated following the date our 2014 Equity Incentive Plan, became effective. Any outstanding stock awards under our 2008 Plan will continue to be governed by the terms of our 2008 Plan and applicable award agreements. Amended and Restated 2014 Equity Incentive Plan Our Amended and Restated 2014 Equity Incentive Plan , or the Plan, is the successor to and continuation of our 2008 Plan. Our board of directors adopted our 2014 Plan on April 17, 2014, and our stockholders subsequently approved the 2014 Plan on May 27, 2014, and it became effective on the date that our registration statement was declared effective by the SEC. Our stockholders approved additional amendments to the 2014 Plan on June 23, 2016. These amendments, among other things, set limits on the total value of compensation that may be paid to any of our non-employee directors during any one calendar year. Our 2014 Plan provides for the grant of incentive stock options, or ISOs, within the meaning of Section 422 of the Internal Revenue Code, or the Code, to our employees and our parent and subsidiary corporations’ employees, and for the grant of nonstatutory stock options, or NSOs, stock appreciation rights, restricted stock awards, restricted stock unit awards, performance-based stock awards, and other forms of equity compensation to our employees, directors and consultants. Additionally, our 2014 Plan provides for the grant of performance cash awards to our employees, directors and consultants. The initial number of shares of our common stock available to be issued under our 2014 Plan was 8,142,857 , which number of shares will be increased by any shares subject to stock options or other stock awards granted under the 2008 Plan that would have otherwise returned to our 2008 Plan (such as upon the expiration or termination of a stock award prior to vesting), not to exceed 16,312,202 . The number of shares of our common stock reserved for issuance under our 2014 Plan will automatically increase on January 1 of each year through and including January 1, 2024, by 5% of the total number of shares of our capital stock outstanding on December 31 of the preceding calendar year, or a lesser number of shares determined by our board of directors. On January 1, 2016, we increased the number of shares of common stock reserved for issuance under our 2014 Plan by 4,066,933 shares. Amended and Restated 2015 Inducement Plan On December 20, 2015, our board of directors adopted our 2015 Inducement Plan, or the Inducement Plan, to reserve 1,600,000 shares of our common stock to be used exclusively for grants of awards to individuals that were not previously employees or directors of the Company. The terms and conditions of the Plan are substantially similar to our stockholder-approved 2014 Plan. On January 5, 2016 our board of directors approved the amendment and restatement of the Inducement Plan to increase the share reserve under the Inducement Plan to 1,970,000 shares of our common stock. As of June 30, 2016 there were 1,970,000 options and restricted stock units outstanding under the Inducement Plan. 2014 Employee Stock Purchase Plan The purpose of the 2014 Employee Stock Purchase Plan, or ESPP, is to secure the services of new employees, to retain the services of existing employees and to provide incentives for such individuals to exert maximum efforts toward our success and that of our affiliates. The ESPP is intended to qualify as an “employee stock purchase plan” within the meaning of Section 423 of the Code. The ESPP permits eligible employees to purchase our common stock through payroll deductions, which may not exceed 15% of the employee’s base compensation. Stock may be purchased under the plan at a price equal to 85% of the fair market value of our common stock on either the first day of the offering or the last day of the applicable purchase period, whichever is lower. The initial number of shares of our common stock initially reserved for issuance under our ESPP was 2,071,428 shares. The number of shares of our common stock reserved for issuance under our ESPP will increase automatically each year, beginning on January 1, 2015 and continuing through and including January 1, 2024, by the lesser of (i) 1% of the total number of shares of our common stock outstanding on December 31 of the preceding calendar year; (ii) 2,142,857 shares of common stock; or (iii) such lesser number as determined by our board of directors. Shares subject to purchase rights granted under our ESPP that terminate without having been exercised in full will not reduce the number of shares available for issuance under our ESPP. On January 1, 2016, we increased the number of shares available for issuance under the ESPP by 813,386 shares. Restricted Stock Units In 2014 we began granting restricted stock units under our 2014 Plan. For stock-based compensation expense, we measure the value of the restricted stock units based on the fair value of our common stock on the date of grant. Our restricted stock unit grants are subject to service conditions and we expense the fair value of those shares on a straight-line basis over their vesting periods. Our restricted stock unit activity for the six months ended June 30, 2016 was as follows: Restricted Stock Units Weighted- Average Number of Grant Date Shares Fair Value Unvested, December 31, 2015 $ Granted Vested Forfeitures Unvested, June 30, 2016 $ Bonus Plans In 2015, our board of directors approved the 2015 Executive Bonus Plan and 2015 Non-Executive Bonus Plan, or 2015 Bonus Plan, which provided for the issuance of shares of unrestricted common stock to employees based on meeting certain Company metrics. We issued 1,653,371 shares of unrestricted common stock in the first quarter of 2016 based on amounts earned under the 2015 Non-Executive Bonus Plan. No shares were issued under the 2015 Executive Bonus Plan. Shares issued from the 2015 Non-Executive Bonus Plan reduced the 2014 Plan shares available for issuance. In May 2016, our compensation committee approved the 2016 Executive Bonus Plan and 2016 Non-Executive Bonus Plan, or 2016 Bonus Plans, each effective as of January 1, 2016. We recorded stock-based compensation expense related to the 2015 and 2016 Bonus Plans over the service period of eligible employees based on forecasted performance relative to the Company metrics. To the extent that updated estimates of bonus expense differed from original estimates, the cumulative effect on current and prior periods of those changes was recorded in the period those estimates were revised. In the three months ended March 31, 2016, we recorded $924,000 of stock-based compensation expense related to the 2015 Non-Executive Bonus Plan. In the three months ended June 30, 2016, we recorded $3.6 million of stock-based compensation expense related to the 2016 Bonus Plans, including an impact from the first quarter of 2016 of $1.7 million. Stock Options Stock option activity under the 2008 Plan and 2014 Plan for the three and six months ended June 30, 2016 was as follows: Options Outstanding Weighted- Number of Average Aggregate Shares Weighted- Remaining Intrinsic Available Number of Average Contractual Value for Issuance Shares Exercise Price Term (Years) (In thousands) Balance—December 31, 2015 $ $ Authorized — Stock options granted Issuance of shares under 2016 Bonus Plans — Restricted stock units granted — Exercised — Stock options canceled Restricted stock units canceled — Balance—June 30, 2016 $ $ Vested and exercisable—June 30, 2016 $ $ Vested and expected to vest(1)—June 30, 2016 $ $ (1) Options expected to vest reflect an estimated forfeiture rate. Our stock-based compensation expense was recorded in the following cost and expense categories (in thousands): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Cost of revenue Research and development Sales and marketing General and administrative Total $ $ $ $ We used the Black-Scholes Model to estimate the fair value of our stock options granted to employees with the following assumptions: Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Expected dividend yield — — — — Risk-free interest rate 1.5% 1.5% 1.4% - 1.5% 1.5% - 1.6% Expected volatility 42% 43% - 44% 42% 43% - 45% Expected life (in years) 6.1 5.5 - 6.1 6.1 5.5 - 6.1 We used the Black-Scholes model to estimate the fair value of our Employee Stock Purchase Plan awards with the following assumptions: Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Expected dividend yield — — — — Risk-free interest rate — — 0.6% 0.1% - 0.6% Expected volatility — — 39% 34% - 35% Expected life (in years) — — 1.3 0.5 - 2.0 As required by Topic 718 Compensation—Stock Compensation , we estimate expected forfeitures and recognize compensation costs only for those equity awards expected to vest. Unrecognized Remaining Stock-based Weighted-Average Compensation Recognition Expense Period (in millions) (in years) Stock options $ Restricted stock units ESPP Total $ Early Exercise of Common Stock No shares were issued from the early exercise of stock options during the six months ended June 30, 2016 . Cash received from the early exercise of stock options is recorded in accrued expenses on the consolidated balance sheets and reclassified to stockholders’ equity as the options vest. The unvested shares are subject to our repurchase right at the original purchase price. As of June 30, 2016 and December 31, 2015 there were 4,988 and 12,428 shares, respectively, legally outstanding, but not included within common stock outstanding for accounting purposes, as a result of the early exercise of common stock options. As of June 30, 2016 and December 31, 2015 , the aggregate price of shares subject to repurchase recorded in accrued expenses totaled $22,000 and $48,000 , respectively.

Employee Benefit Plan

Employee Benefit Plan	6 Months Ended
	Jun. 30, 2016
Compensation And Retirement Disclosure [Abstract]
Employee Benefit Plan	1 0 . Employee Benefit Plan We maintain a defined contribution 401(k) plan. The plan covers all full-time U.S. employees over the age of 21 . Each employee can contribute up to $18,000 annually (with a $6,000 catch up contribution limit for employees aged 50 or older) . We have the option to provide matching contributions, but have not done so to date.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies Operating Leases We lease our office facilities under noncancelable agreements expiring between 2016 and 2023 . Rent expense for the three months ended June 30, 2016 and 2015 was $1.6 million and $1.1 million respectively. Rent expense for the six months ended June 30, 2016 and 2015 was $3.4 million and $2.2 million, respectively. The aggregate future minimum lease payments under our agreements are as follows (in thousands): Year 2016 (remaining) $ 2017 2018 2019 2020 Thereafter Total $ Litigation On May 1, 2015, a purported stockholder class action lawsuit was filed in the United States District Court for the Northern District of California against the Company and certain of its officers, captioned Panjwani v. MobileIron, Inc., et al. The action was purportedly brought on behalf of a putative class of all persons who purchased or otherwise acquired the Company’s securities between February 13, 2015 and April 22, 2015. It asserted claims for violation of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934.The complaint sought, among other things, compensatory damages and attorney’s fees and costs on behalf of the putative class. An amended complaint was filed on September 28, 2015. On February 22, 2016, the District Court issued an order granting MobileIron’s motion to dismiss the amended complaint and on March 15, 2016 the Court dismissed the case. MobileIron paid no money to the plaintiffs or their attorneys in connection with the dismissal of the action. On August 5, 2015, August 21, 2015 and August 24, 2015, purported stockholder class action lawsuits were filed in the Superior Court of California, Santa Clara County against the Company, certain of its officers, directors, underwriters and investors, captioned Schneider v. MobileIron, Inc., et al., Kerley v. MobileIron, Inc., et al. and Steinberg v. MobileIron, Inc., et al, which were subsequently consolidated under the case caption In re MobileIron Shareholder Litigation. The actions are purportedly brought on behalf of a putative class of all persons who purchased the Company’s securities issued pursuant or traceable to the Company’s registration statement and the June 12, 2014 initial public offering. The lawsuits assert claims for violations of Sections 11, 12(a)(2) and 15 of the Securities Act of 1933. The complaint seeks among other things, compensatory damages and attorney’s fees and costs on behalf of the putative class. On April 12, 2016, Plaintiffs filed a corrected consolidated complaint, which no longer names the underwriters or investors as defendants. The Company intends to defend this litigation vigorously. We continually evaluate uncertainties associated with litigation and record a charge equal to at least the minimum estimated liability for a loss contingency when both of the following conditions are met: (i) information available prior to issuance of the financial statements indicates that it is probable that a liability has been incurred at the date of the financial statements and (ii) the loss or range of loss can be reasonably estimated. If we determine that a loss is possible and a range of the loss can be reasonably estimated, we disclose the range of the possible loss in the Notes to the Consolidated Financial Statements. We evaluate, on a quarterly basis, developments in our legal matters that could affect the amount of liability that has been previously accrued, if any, and the matters and related ranges of possible losses disclosed, and make adjustments and changes to our disclosures as appropriate. Significant judgment is required to determine both likelihood of there being and the estimated amount of a loss related to such matters. Until the final resolution of such matters, there may be an exposure to loss, and such amounts could be material. An estimate of a reasonably possible loss (or a range of loss) cannot be made in our lawsuits at this time. Indemnification Under the indemnification provisions of our standard sales related contracts, we agree to defend and/or settle claims brought by third parties against our customers alleging that the customer’s use of our software infringes the third party’s intellectual property right, such as a patent right. These indemnification obligations are typically not subject to limitation; however if it is commercially impractical for us to either procure the right for the customer to continue to use our software or modify our software so that it’s not infringing, we typically can terminate the customer agreement and refund the customer a portion of the license fees paid, prorated over the three year period from initial delivery. We also on occasion indemnify our customers for other types of third party claims. In addition, we indemnify our officers, directors, and certain key employees while they are serving in such capacities in good faith. Through June 30, 2016, we have not received any material written claim for indemnification .

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Segment Information	1 2 . Segment Information We conduct business globally. Our chief operating decision maker (Chief Executive Officer) reviews financial information presented on a consolidated basis accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. We have one business activity, and there are no segment managers who are held accountable for operations, operating results and plans for levels, components or types of products or services below the consolidated unit level. Accordingly, we are considered to be in a single reportable segment and operating unit structure. Revenue by geographic region based on the billing address was as follows: Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2016 2015 2016 2015 Revenue United States $ $ $ $ International Total $ $ $ $ We recognized revenue of $4.8 million, or 12% , and $4.1 million, or 12% , of total revenue from customers with a billing address in Germany for the three months ended June 30 , 201 6 and 2015, respectively. We recognized revenue of $9.7 million, or 13% , and $7.3 million, or 11% , of total revenue from customers with a billing address in Germany for the six months ended June 30 , 201 6 and 2015, respectively. No other country, except for the United States and Germany, exceeded 10% of the total revenue in the six months ended June 30, 201 6 and 2015 . As of June 30, 2016 and December 31, 2015, $1.4 million or 22%, of our net Property and Equipment was attributable to our operations located in India. Substantially all other long-lived assets were attributable to operations in the United States.

Net Loss per Share

Net Loss per Share	6 Months Ended
	Jun. 30, 2016
Net Loss Per Share [Abstract]
Net Loss per Share	1 3 . Net Loss per Share The following table sets forth the computation of basic and diluted net loss per share for the three and six months ended June 30, 2016 and 2015 (in thousands, except per share data): Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Numerator: Net loss $ $ $ $ Denominator: Weighted–average shares outstanding Less: weighted average shares subject to repurchase Weighted–average shares used to compute basic and diluted net loss per share Basic and diluted net loss per share $ $ $ $ Basic net loss per share is computed by dividing the net loss by the weighted-average number of common shares outstanding for the period. Because we have reported a net loss for the three and six months ended June 30, 2016 and 2015 , the number of shares used to calculate diluted net loss per common share is the same as the number of shares used to calculate basic net loss per common share for those periods presented because the potentially dilutive shares would have been anti-dilutive if included in the calculation. The following potentially dilutive securities outstanding have been excluded from the computation of diluted weighted-average shares outstanding because such securities have an antidilutive impact due to losses reported (in common stock equivalent shares): June 30, June 30, 2016 2015 Options to purchase common stock and unvested restricted stock and restricted stock units

Description of Business and S20

Description of Business and Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business	Description of Business MobileIron, Inc., and its wholly owned subsidiaries collectively, the “Company”, “we”, “us” or “our”, provides a purpose-built mobile IT platform that enables enterprises to manage and secure mobile applications, content and devices while providing their employees with device choice, privacy and a native user experience. We were incorporated in Delaware in July 2007 and are headquartered in Mountain View, California, with additional sales and support presence in North America, Europe, the Middle East, Asia and Australia.
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements as of June 30, 2016 and for the three and six months ended June 30, 2016 and 2015 have been prepared in accordance with U.S. generally accepted accounting principles, or GAAP, for interim financial statements and pursuant to the rules and regulations of the Securities and Exchange Commission, or the SEC, and include the accounts of our wholly owned subsidiaries. Intercompany accounts and transactions have been eliminated in consolidation. Certain information and footnote disclosures in this Form 10-Q normally included in annual financial statements prepared in accordance with U.S. GAAP and pursuant to the rules and regulations of the SEC have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the unaudited condensed consolidated financial statements reflect all normal recurring adjustments necessary for a fair presentation of our balance sheet as of June 30 , 2016, our operating results for the three and six months ended June 30, 2016 and 2015, and our cash flows for the six months ended June 30 , 2016 and 2015. Our operating results for the three and six months ended June 30 , 2016 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2016. The condensed consolidated balance sheet as of December 31, 2015 has been derived from the audited consolidated financial statements as of that date but does not include all the footnotes required by U.S. GAAP for complete financial statements. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with our audited financial statements and related notes thereto for the year ended December 31, 2015, included in our Annual Report on Form 10-K filed with the SEC on February 23, 2016.
Foreign Currency Translation	Foreign Currency Translation Our reporting currency is the U.S. dollar. The functional currency of all our international operations is the U.S. dollar. All monetary asset and liability accounts are translated into U.S. dollars at the period-end rate, nonmonetary assets and liabilities are translated at historical exchange rates, and revenue and expenses are translated at the weighted-average exchange rates in effect during the period. Translation adjustments arising are recorded as foreign currency gains (losses) in the consolidated statements of operations.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. These estimates include, but are not limited to, revenue recognition, stock-based compensation, stock-settled bonus expense, goodwill, intangible assets and accounting for income taxes. Actual results could differ from those estimates.
Concentrations of Credit Risk	Concentrations of Credit Risk Financial instruments that potentially subject us to a concentration of credit risk consist of cash, money market funds and fixed income investments. Although we deposit our cash with multiple financial institutions, our deposits, at times, exceed federally insured limits. We invest in fixed income securities that are of high-credit quality. Substantially all of our money market funds, or $20.5 million, are held in two funds that are rated “AAA.” We generally do not require collateral or other security in support of accounts receivable. Allowances are provided for individual accounts receivable when we become aware of a customer’s inability to meet its financial obligations, such as in the case of bankruptcy, deterioration of the customer’s operating results, or change in financial position. If circumstances related to customers change, estimates of the recoverability of receivables would be further adjusted. We also consider broader factors in evaluating the sufficiency of our allowances for doubtful accounts, including the length of time receivables are past due, significant one-time events and historical experience. As of June 30, 2016 and December 31, 2015 we have an allowance for doubtful accounts of $506,000 and $628,000 , respectively. One reseller accounted for 16% of total revenue ( 1% as an end customer) and for 17% of total revenue ( 1% as an end customer) for the three and six months ended June 30, 2016 , respectively, and for 17% of total revenue ( 1% as an end customer) and 18% of total revenue ( 1% as an end customer) for the three and six months ended June 30, 2015, respectively. The same reseller accounted for 18% and 14% of net accounts receivable as of June 30, 2016 and December 31, 2015 . There were no other resellers or end-us er customers that accounted for 10% or more as a percentage of our revenue or net accounts receivable for any period presented.
Segments	Segments We have one reportable segment.
Revenue Recognition	Revenue Recognition We derive revenue principally from software-related arrangements consisting of perpetual software licenses, post-contract customer support for such licenses, or PCS or software support, including when and if available updates, and professional services such as consulting and training services. We also offer our software as term-based licenses and cloud-based arrangements. In addition, we install our software on hardware appliances that we ship to customers. We begin to recognize revenue when (i) persuasive evidence of an arrangement exists, (ii) delivery has occurred or services have been provided, (iii) the sales price is fixed or determinable, and (iv) collection of the related receivable is probable. If collection is not considered probable, revenue is recognized only upon collection. Signed agreements, including by electronic acceptance, are used as evidence of an arrangement. Delivery is considered to occur when we provide a customer with a link and credentials to download our software. Delivery of a hardware appliance (an “appliance”) is considered to occur when title and risk of loss has transferred to the customer, which typically occurs when appliances are delivered to a common carrier. Delivery of services occurs when performed. In our vendor specific objective evidence, or VSOE , analysis, we generally include stand-alone sales transactions completed during a rolling 12 month period unless a shorter period is appropriate due to changes in our pricing structure. We typically enter into multiple-element arrangements with our customers in which a customer may purchase a combination of software on a perpetual or subscription license, PCS, and professional services. The professional services are not considered essential to the functionality of the software. All of these elements are considered separate units of accounting. Our standard agreements do not include rights for customers to cancel or terminate arrangements or to return software to obtain refunds. We use the residual method to recognize revenue when a perpetual license arrangement includes one or more elements to be delivered at a future date provided the following criteria are met: (i) VSOE of fair value does not exist for one or more of the delivered items but exists for all undelivered elements, (ii) all other applicable revenue recognition criteria are met and (iii) the fair value of all of the undelivered elements is less than the arrangement fee. VSOE of fair value is based on the normal pricing practices for those products and services when sold separately by us and contractual customer renewal rates for post-contract customer support services. Under the residual method, the fair value of the undelivered elements is deferred and the remaining portion of the arrangement fee is recognized as revenue in the period in which it was earned. If VSOE of fair value of one or more undelivered elements does not exist, then the revenue is deferred and recognized when delivery of those elements occurs, or when fair value can be established, or ratably over the PCS period if the only undelivered element is PCS—we refer to these deferred revenue elements as the “Deferred Portion.” Revenue from subscriptions to our on-premise term licenses, arrangements where perpetual and subscriptions to our on-premise term licenses are sold together, and subscriptions to our cloud service are recognized ratably over the contractual term for all periods presented and are included as a component of subscription revenue within our consolidated statements of operations. We refer to arrangements where perpetual and subscriptions to our on-premise term licenses are sold together as “Bundled Arrangements.” Occasionally, we enter into multiple-element arrangements with our customers in which a customer may purchase a combination of software on a perpetual or term basis, PCS, professional services, and appliances. We generally provide the appliances and software upon the commencement of the arrangement and provide software-related elements throughout the support period. We account for appliance-bundled arrangements under the revised accounting standard related to multiple-element arrangements, Accounting Standard Update, or ASU, No. 2009-13, Multiple Element Arrangements , and determine the revenue to be recognized based on the standard’s fair value hierarchy and then determine the value of each element in the arrangement based on the relative selling price of the arrangement. Amounts related to appliances are generally recognized upon delivery with the remaining consideration allocated to software and software-related elements, which are recognized as described elsewhere in this policy. Revenue from PCS is recognized ratably over the support term and is included as a component of software support and service revenue within the consolidated statements of operations. Revenue related to professional services is recognized upon delivery and is included as a component of software support and services revenue within the consolidated statements of operations. Appliance revenue was less than 10% of total revenue for all periods presented and is included as a component of perpetual license revenue within the consolidated statements of operations. Historically, sales made through resellers were fulfilled directly to the end users, and we recognized revenue when we delivered licenses to the end users and all other revenue recognition criteria were met. Over time, however, our business has evolved and some of our operators, system integrators and other resellers have requested that we deliver licenses to them. In those instances we recognize revenue at the time that we deliver to our resellers and all other revenue recognition criteria are met; such resellers have no rights of return or exchange. Shipping charges and sales tax billed to partners are excluded from revenue. Sales commissions and other incremental costs to acquire contracts are also expensed as incurred and are recorded in sales and marketing expense. For all arrangements, any revenue that has been deferred and is expected to be recognized beyond one year is classified as long-term deferred revenue in the consolidated balance sheets.
Cash Equivalents	Cash Equivalents We consider all highly liquid investments with an original maturity of three months or less to be cash equivalents. As of June 30, 2016 and December 31, 2015 cash and cash equivalents consist of cash deposited with banks, money market funds and investments that mature within three months of their purchase.
Held-To-Maturity Investments	Held-To-Maturity Investments We determine the appropriate classification of our fixed income investments at the time of purchase and reevaluate their classifications each reporting period. Investments are classified as held-to-maturity since the Company has positive intent and the ability to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost. We recorded $113,000 and $66,000 o f interest income for the three months ended June 3 0 , 2016 and 2015 , respectively , and recorded $205,000 and $ 116,000 of interest income for the six months ended June 3 0 , 2016 and 2015 , respectively.
Comprehensive Loss	Comprehensive Loss Comprehensive loss includes all changes in equity (net assets) during a period from non-owner sources. For the three and six months ended June 30, 2016 and 2015 , there were no differences between net loss and comprehensive loss. Therefore, the consolidated statements of comprehensive loss have been omitted.
Net Loss per Share of Common Stock	Net Loss per Share of Common Stock Basic net loss per common share is calculated by dividing the net loss by the weighted-average number of common shares outstanding during the period, without consideration for potentially dilutive securities. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of common shares and potentially dilutive securities outstanding for the period determined using the treasury-stock and if-converted methods. For purposes of the diluted net loss per share calculation, unvested restricted stock and stock options are considered to be potentially dilutive securities. Because we have reported a net loss for the three and six months ended June 30, 2016 and 2015 , the number of shares used to calculate diluted net loss per common share is the same as the number of shares used to calculate basic net loss per common share for those periods presented because the potentially dilutive shares would have been anti-dilutive if included in the calculation.
Inventory	Inventory We have appliances (industry standard hardware servers available from multiple vendors) that are available for customers to purchase, on which we will install our software prior to shipment. Inventory is stated at the lower of cost or market value. We value our inventory using the first-in, first-out method. Appropriate consideration is given to obsolescence, excessive levels, deterioration and other factors in evaluating carrying value—such adjustments were not material for any period presented. The entire inventory is comprised of finished goods. As of June 30, 2016 and December 31, 2015 , we had inventory of $274,000 and $309,000 , respectively, which is included in prepaid expenses and other current assets in the consolidated balance sheets.
Software Development Costs Incurred in Connection with Software to be Sold or Marketed	Software Development Costs Incurred in Connection with Software to be Sold or Marketed The costs to develop new software products and enhancements to existing software products are expensed as incurred until technological feasibility has been established. We consider technological feasibility to have occurred when all planning, designing, coding and testing have been completed according to design specifications. Once technological feasibility is established, any additional costs would be capitalized. We believe our current process for developing software is essentially completed concurrent with the establishment of technological feasibility, and accordingly, no costs have been capitalized.
Internal Use Software	Internal Use Software We capitalize costs incurred during the application development stage related to our internally used software. Such costs are primarily incurred by third party vendors and consultants. Costs related to preliminary project activities and post-implementation activities are expensed as incurred. Amounts capitalized in all periods presented were not significant. All software development costs incurred in connection with our cloud offering, or SaaS are also sold or marketed to partners or end customers, therefore we start capitalizing costs when technological feasibility is achieved. No costs were capitalized in any periods presented as we believe that our current process for developing software is essentially completed concurrent with the establishment of technological feasibility.
Property and Equipment	Property and Equipment Property and equipment are stated at cost. Depreciation is computed using the straight-line method over the estimated useful lives, determined to be three years for computers and equipment and software, five years for furniture and fixtures, and the lesser of the remaining lease term or estimated useful life for leasehold improvements. Expenditures for repairs and software support are charged to expense as incurred. Upon disposition, the cost and related accumulated depreciation are removed from the accounts and the resulting gain or loss is reflected as operating expenses in the consolidated statements of operations.
Goodwill and Intangible Assets	Goodwill and Intangible Assets We record the excess of the acquisition purchase price over the fair value of the tangible and identifiable intangible assets acquired as goodwill. We perform an impairment test of our goodwill in the third quarter of our fiscal year, or more frequently if indicators of potential impairment arise. We have a single reporting unit and consequently evaluate goodwill for impairment based on an evaluation of the fair value of the Company as a whole. We record purchased intangible assets at their respective estimated fair values at the date of acquisition. Purchased intangible assets are being amortized using the straight-line method over their remaining estimated useful lives, which range from three to five years. We evaluate the remaining useful lives of intangible assets on a periodic basis to determine whether events or circumstances warrant a revision to the remaining estimated amortization period.
Long-Lived Assets with Finite Lives	Long-Lived Assets with Finite Lives Long-lived assets are reviewed for possible impairment whenever events or circumstances indicate that the carrying amount of these assets may not be recoverable. We evaluate the recoverability of each of our long-lived assets, including purchased intangible assets and property and equipment, by comparison of its carrying amount to the future undiscounted cash flows we expect the asset to generate. If we consider the asset to be impaired, we measure the amount of any impairment as the difference between the carrying amount and the fair value of the impaired asset.
Stock-Based Compensation	Stock-Based Compensation We use the estimated grant-date fair value method of accounting in accordance with Accounting Standards Codification, or ASC, Topic 718 Compensation—Stock Compensation . Fair value is determined using the Black-Scholes Model using various inputs, including our estimates of expected volatility, term and future dividends. We estimated the forfeiture rate for the three and six months ended June 30, 2016 based on our historical experience for annual grant years where the majority of the vesting terms have been satisfied. For stock options, restricted stock units or restricted stock grants with no performance condition, we recognize compensation costs on a straight-line basis over the requisite service period of the award, which is generally the vesting term of four years.
Research and Development	Research and Development Research and development, or R&D, costs are charged to expense as incurred.
Advertising	Advertising Advertising costs are expensed and included in sales and marketing expense when incurred. Advertising expense for the three and six months ended June 30, 2016 and 2015 was not significant.
Income Taxes	Income Taxes We account for income taxes in accordance with ASC Topic 740, Income Taxes , under which deferred tax liabilities and assets are recognized for the expected future tax consequences of temporary differences between financial statement carrying amounts and the tax basis of assets and liabilities and net operating loss and tax credit carryforwards. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. We use a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. A tax position is recognized when it is more likely than not that the tax position will be sustained upon examination, including resolution of any related appeals or litigation processes. A tax position that meets the more-likely-than-not recognition threshold is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement with a taxing authority. The standard also provides guidance on derecognition of tax benefits, classification on the balance sheet, interest and penalties, accounting in interim periods, disclosure and transition.
Recent Accounting Pronouncements	Recent Accounting Pronouncements From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board, or FASB, or other standard setting bodies and adopted by us as of the specified effective date. Unless otherwise discussed, the impact of recently issued standards that are not yet effective will not have a material impact on our financial position or results of operations upon adoption. In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments – Credit Losses – Measurement of Credit Losses on Financial Instruments, which introduces a model based on expected losses to estimate credit losses for most financial assets and certain other instruments. In addition, for available-for-sale debt securities with unrealized losses, the losses will be recognized as allowances rather than reductions in the amortized cost of the securities. The standard is effective for annual reporting periods beginning after December 15, 2019, with early adoption permitted for annual reporting periods beginning after December 15, 2018. Entities will apply the standard’s provisions by recording a cumulative-effect adjustment to retained earnings. We are evaluating the impact of the adoption on our consolidated financial position, results of operations, cash flows and disclosures. In May 2014, the FASB, jointly with the International Accounting Standards Board, issued a comprehensive new standard on revenue recognition from contracts with customers. The standard’s core principle is that a reporting entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In applying this new guidance to contracts within its scope, an entity will: (1) identify the contract(s) with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price to the performance obligations in the contract, and (5) recognize revenue when (or as) the entity satisfies a performance obligation. Additionally, this new guidance will require significantly expanded disclosures about revenue recognition. As clarified by the FASB on July 9, 2015, provisions of this new standard are effective for annual reporting periods (including interim reporting periods within those annual periods) beginning after December 15, 2017. Early adoption is permitted for annual reporting periods (including interim reporting periods within those annual periods) beginning after December 15, 2016. Entities have the option of using either a full retrospective or a modified retrospective approach to adopt this new guidance. We are currently evaluating the potential effect on our consolidated financial statements from adoption of this standard. In February 2016, the FASB finalized the Accounting Standard Update, or ASU, 2016-02, “Leases”. ASU 2016-02 requires lessees to recognize the assets and liabilities on the balance sheet for the rights and obligations created by most leases (leases with the term of 12 months or longer) and continue to recognize expenses on the income statements over the lease term. It will also require disclosure designed to give financial statement users information on the amount, timing, and uncertainly of cash flows arising from leases. The guidance is effective for annual reporting periods beginning after December 15, 2018 and interim periods within those fiscal years. We are currently evaluating the effect of the standard on our consolidated financial statements and will adopt ASU 2016-02 effective January 1, 2019 . In March 2016, the FASB issued new Accounting Standard Update, or ASU, 2016-09, “ Improvements to Employee Share-Based Payment Accounting” . ASU 2016-09 simplifies several aspects of the accounting for employee share-based payment transactions including the accounting for income taxes, forfeitures, statutory tax withholding requirements and classification in the statement of cash flows. Under the new standard, excess tax benefits and tax deficiencies are to be recognized as income tax expense or benefit in the income statement and the excess tax benefits and tax deficiencies are considered discrete items in the reporting period they occur and are not included in the estimate of an entity’s annual effective tax rate. Excess tax benefits will be classified along with other cash flows related to income taxes as an operating activity. The ASU allows an entity to elect as an accounting policy either to continue to estimate the total number of awards that are expected to vest or account for forfeitures when they occur. The ASU modifies the current exception to liability classification of an award when an employer uses a net-settlement feature to withhold shares to meet the employer’s minimum statutory tax withholding requirement. The guidance is effective for annual reporting periods beginning after December 15, 2016 and interim periods within those fiscal years. We are currently evaluating the effect of the standard on our consolidated financial statements and intend to adopt ASU 2016-09 effective January 1, 2017.

Significant Balance Sheet Com21

Significant Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2016
Balance Sheet Related Disclosures [Abstract]
Schedule of Property and Equipment (in thousands)	June 30, 2016 December 31, 2015 Computers and appliances $ $ Purchased software Furniture and fixtures Leasehold improvements Total property and equipment Accumulated depreciation and amortization Total property and equipment—net $ $
Schedule of Accrued Expenses (in thousands)	June 30, 2016 December 31, 2015 Accrued commissions $ $ Accrued stock-settled bonus Accrued vacation Employee Stock Purchase Plan liability Other accrued payroll-related expenses Other accrued liabilities Total accrued expenses $ $
Schedule of Current and Non-Current Deferred Revenue (in thousands)	June 30, 2016 December 31, 2015 Perpetual license $ $ Subscription Software support Professional services Total current and noncurrent deferred revenue $ $

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	6 Months Ended
	Jun. 30, 2016
Fair Value Disclosures [Abstract]
Schedule of Financial Instruments Measured at Fair Value (in thousands)	As of June 30, 2016 (in thousands) Level 1 Level 2 Level 3 Total Money market funds $ $ — $ — $ Corporate debt securities — — Commercial paper — — Securities and obligations of U.S. government agencies — — Total $ $ $ — $ As of December 31, 2015 (in thousands) Level 1 Level 2 Level 3 Total Money market funds $ $ — $ — $ Corporate debt securities — — Commercial paper — — Securities and obligations of U.S. government agencies — — Total $ $ $ — $

Investments (Tables)

Investments (Tables)	6 Months Ended
	Jun. 30, 2016
Investments, Debt and Equity Securities [Abstract]
Schedule of Investments in Fixed Income Securities	As of June 30, 2016 Amortized Fair (in thousands) cost Gains Losses Value Corporate debt securities $ $ $ $ Commercial paper — Securities and obligations of U.S. government agencies — Total $ $ $ $ As of December 31, 2015 Amortized Fair (in thousands) cost Gains Losses Value Corporate debt securities $ $ $ $ Commercial paper Securities and obligations of U.S. government agencies — Total $ $ $ $
Summary of the Balance Sheet Classification of Investments	As of June 30, As of December 31, (in thousands) 2016 2015 Cash equivalents $ $ Short-term investments Long-term investments Total investments $ $
Schedule of Held-to-Maturity Investments by Contractual Maturity	As of June 30, 2016 As of December 31, 2015 Gross Gross Amortized Fair Amortized Fair (in thousands) Cost Value Cost Value Due in one year or less $ $ $ $ Due after one year through five years Total $ $ $ $

Goodwill and Intangibles (Table

Goodwill and Intangibles (Tables)	6 Months Ended
	Jun. 30, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets Subject to Amortization (in thousands)	June 30, 2016 Gross Carrying Accumulated Net Book Amount Amortization Impairment Value Technology $ $ — $ Total $ $ $ — $ December 31, 2015 Gross Carrying Accumulated Net Book Amount Amortization Impairment Value Technology $ $ — $ Total $ $ $ — $
Estimated Intangible Assets Amortization Expense (in thousands)	Year 2016 (remaining) $ 2017 2018 2019 — 2020 — Total $
Carrying Value of Goodwill (in thousands)	Balance, December 31, 2015 $ Additions — Balance, June 30, 2016 $

Common Stock (Tables)

Common Stock (Tables)	6 Months Ended
	Jun. 30, 2016
Stockholders Equity Note [Abstract]
Schedule of Common Stock Reserved for Issuance	June 30, December 31, 2016 2015 Options outstanding Unvested restricted stock units outstanding Unvested early exercised stock options Shares available for grant under the 2014 Equity Incentive Plan and 2015 Inducement Plan Shares available for purchase under the Employee Stock Purchase Plan Total

Share Based Awards (Tables)

Share Based Awards (Tables)	6 Months Ended
	Jun. 30, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Schedule of Restricted Stock Unit Activity	Restricted Stock Units Weighted- Average Number of Grant Date Shares Fair Value Unvested, December 31, 2015 $ Granted Vested Forfeitures Unvested, June 30, 2016 $
Schedule of Stock Option Activity	Options Outstanding Weighted- Number of Average Aggregate Shares Weighted- Remaining Intrinsic Available Number of Average Contractual Value for Issuance Shares Exercise Price Term (Years) (In thousands) Balance—December 31, 2015 $ $ Authorized — Stock options granted Issuance of shares under 2016 Bonus Plans — Restricted stock units granted — Exercised — Stock options canceled Restricted stock units canceled — Balance—June 30, 2016 $ $ Vested and exercisable—June 30, 2016 $ $ Vested and expected to vest(1)—June 30, 2016 $ $ (1) Options expected to vest reflect an estimated forfeiture rate.
Schedule of Stock-based Compensation Expense Recognized (in thousands)	Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Cost of revenue Research and development Sales and marketing General and administrative Total $ $ $ $
Schedule of Assumptions Used for Calculating the Fair Value of Employee Option Grants	Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Expected dividend yield — — — — Risk-free interest rate 1.5% 1.5% 1.4% - 1.5% 1.5% - 1.6% Expected volatility 42% 43% - 44% 42% 43% - 45% Expected life (in years) 6.1 5.5 - 6.1 6.1 5.5 - 6.1
Schedule of Assumptions Used for Calculating the Fair Value of Employee stock purchase plans	Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Expected dividend yield — — — — Risk-free interest rate — — 0.6% 0.1% - 0.6% Expected volatility — — 39% 34% - 35% Expected life (in years) — — 1.3 0.5 - 2.0
Schedule of Unrecognized Stock-based Compensation Related to Nonvested Awards	Unrecognized Remaining Stock-based Weighted-Average Compensation Recognition Expense Period (in millions) (in years) Stock options $ Restricted stock units ESPP Total $

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2016
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments (in thousands)	Year 2016 (remaining) $ 2017 2018 2019 2020 Thereafter Total $

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2016
Segment Reporting [Abstract]
Schedule of Revenue by Geographic Region	Three Months Ended Six Months Ended June 30, June 30, (in thousands) 2016 2015 2016 2015 Revenue United States $ $ $ $ International Total $ $ $ $

Net Loss per Share (Tables)

Net Loss per Share (Tables)	6 Months Ended
	Jun. 30, 2016
Net Loss Per Share [Abstract]
Schedule of Basic and Diluted Net Loss per Share (in thousands, except per share data)	Three Months Ended Six Months Ended June 30, June 30, 2016 2015 2016 2015 Numerator: Net loss $ $ $ $ Denominator: Weighted–average shares outstanding Less: weighted average shares subject to repurchase Weighted–average shares used to compute basic and diluted net loss per share Basic and diluted net loss per share $ $ $ $
Schedule of Antidilutive Securities Excluded from Net Loss per Share Computation	June 30, June 30, 2016 2015 Options to purchase common stock and unvested restricted stock and restricted stock units

Description of Business and S30

Description of Business and Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016USD ($)item	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)segmentitem	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Description Of Business And Significant Accounting Policies [Line Items]
AAA-rated money market funds	$ 20,500,000		$ 20,500,000
Number of Money Market Funds | item	2		2
Accounts receivable allowances	$ 506,000		$ 506,000		$ 628,000
Bad debt expense				$ 150,000
Number of Reportable Segments | segment			1
Period for inclusion in VSOE analysis			12 months
Interest Income	113,000	$ 66,000	$ 205,000	116,000
Vesting period (in years)			4 years
Prepaid expenses and other current assets
Description Of Business And Significant Accounting Policies [Line Items]
Inventory	274,000		$ 274,000		$ 309,000
Other expense - net
Description Of Business And Significant Accounting Policies [Line Items]
Foreign currency loss	$ 89,000	$ 83,000	$ 47,000	$ 257,000
Computers and appliances
Description Of Business And Significant Accounting Policies [Line Items]
Property plant and equipment useful life			3 years
Furniture and Fixtures
Description Of Business And Significant Accounting Policies [Line Items]
Property plant and equipment useful life			5 years
Minimum
Description Of Business And Significant Accounting Policies [Line Items]
Estimated useful life, purchased intangible assets			3 years
Maximum
Description Of Business And Significant Accounting Policies [Line Items]
Estimated useful life, purchased intangible assets			5 years
Sales Revenue, Net | Appliance Revenue | Maximum
Description Of Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage			10.00%	10.00%
As Reseller | Sales Revenue, Net
Description Of Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage	16.00%	17.00%	17.00%	18.00%
As Reseller | Net Accounts Receivable
Description Of Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage			18.00%		14.00%
As an end customer | Sales Revenue, Net
Description Of Business And Significant Accounting Policies [Line Items]
Concentration risk, percentage	1.00%	1.00%	1.00%	1.00%

Significant Balance Sheet Com31

Significant Balance Sheet Components - Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 15,852	$ 14,353
Accumulated depreciation and amortization	(9,462)	(7,781)
Total property and equipment-net	6,390	6,572
Computers and appliances
Property Plant And Equipment [Line Items]
Property and equipment, gross	9,275	7,908
Purchased software
Property Plant And Equipment [Line Items]
Property and equipment, gross	2,251	2,220
Furniture and Fixtures
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,360	1,338
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 2,966	$ 2,887

Significant Balance Sheet Com32

Significant Balance Sheet Components - Accrued Expenses (Details) - USD ($)	3 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2015
Accrued commissions		$ 3,594,000	$ 4,181,000
Accrued stock settled bonus		3,639,000	4,714,000
Accrued vacation		661,000	512,000
Employee stock purchase plan liability		2,090,000	2,329,000
Other accrued payroll-related expenses		2,420,000	2,483,000
Other accrued liabilities		4,462,000	4,977,000
Total accrued expenses		$ 16,866,000	$ 19,196,000
Forecast
Severance and severance-related costs	$ 800,000

Significant Balance Sheet Com33

Significant Balance Sheet Components - Deferred Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Deferred Revenue
Current and noncurrent deferred revenue	$ 72,487	$ 69,875
Perpetual license
Deferred Revenue
Current and noncurrent deferred revenue	176	400
Subscription
Deferred Revenue
Current and noncurrent deferred revenue	27,524	25,013
Software support
Deferred Revenue
Current and noncurrent deferred revenue	42,762	42,254
Professional services
Deferred Revenue
Current and noncurrent deferred revenue	$ 2,025	$ 2,208

Fair Value Measurement (Details

Fair Value Measurement (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	$ 74,270	$ 83,983
Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	20,475	18,850
Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	53,795	65,133
Money Market Funds
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	20,475	18,850
Money Market Funds | Level 1
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	20,475	18,850
Corporate debt securities
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	14,841	28,520
Corporate debt securities | Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	14,841	28,520
Commercial paper
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	36,542	24,187
Commercial paper | Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	36,542	24,187
Securities and obligations of U.S. government agencies
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	2,412	12,426
Securities and obligations of U.S. government agencies | Level 2
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Assets fair value	$ 2,412	$ 12,426

Investments - Investments in fi

Investments - Investments in fixed income securities(Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	$ 53,775	$ 65,167
Gains	21	2
Losses	(1)	(36)
Fair Value	53,795	65,133
Corporate debt securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	14,835	28,549
Gains	7	1
Losses	(1)	(30)
Fair Value	14,841	28,520
Commercial paper
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	36,530	24,187
Gains	12	1
Losses		(1)
Fair Value	36,542	24,187
Securities and obligations of U.S. government agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized cost	2,410	12,431
Gains	2
Losses		(5)
Fair Value	$ 2,412	$ 12,426

Investments - Balance sheet cla

Investments - Balance sheet classification of investments (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Cash equivalents	$ 9,398	$ 13,499
Short-term investments	43,622	49,574
Long-term investments	755	2,094
Total	$ 53,775	$ 65,167

Investments - Cost vs FV (Detai

Investments - Cost vs FV (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Gross Amortized Cost
Due in one year or less	$ 53,020	$ 63,073
Due after one through five years	755	2,094
Total	53,775	65,167
Fair Value
Due in one year or less	53,040	63,040
Due after one through five years	755	2,093
Total	$ 53,795	$ 65,133

Goodwill and Intangibles - Inta

Goodwill and Intangibles - Intangible assets subject to amortization (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,080	$ 3,080
Accumulated Amortization	(2,127)	(1,819)
Net Book Value	$ 953	1,261
Weighted Average Remaining Life, Intangible Assets	1 year 6 months
Technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,080	3,080
Accumulated Amortization	(2,127)	(1,819)
Net Book Value	$ 953	$ 1,261

Goodwill and Intangibles - Amor

Goodwill and Intangibles - Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
2016 (remaining)	$ 308
2,017	545
2,018	100
Net Book Value	$ 953	$ 1,261

Goodwill and Intangibles - Good

Goodwill and Intangibles - Goodwill Rollforward (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016USD ($)
Goodwill [Roll Forward]
Beginning Balance	$ 5,475
Additions	0
Ending Balance	$ 5,475

Line of Credit (Details)

Line of Credit (Details) $ in Millions	1 Months Ended	6 Months Ended
	May 31, 2015USD ($)	Jun. 30, 2016USD ($)	Dec. 31, 2015USD ($)
Line Of Credit Facility [Line Items]
Revolving line of credit, maximum borrowing capacity		$ 20
Quick ratio		1.25
Revolving line of credit amount outstanding		$ 0	$ 0
Line of Credit Facility, Remaining Borrowing Capacity	$ 18.5
Prime Rate
Line Of Credit Facility [Line Items]
Revolving line of credit, basis spread over variable rate		5.00%
Letter of Credit [Member]
Line Of Credit Facility [Line Items]
Amount drawn from revolving line of credit	$ 1.5

Preferred Stock (Details)

Preferred Stock (Details) - shares	Jun. 30, 2016	Dec. 31, 2015
Temporary Equity Disclosure [Abstract]
Convertible preferred stock, shares authorized	10,000,000	10,000,000
Convertible preferred stock, shares issued	0	0
Convertible preferred stock, shares outstanding	0	0

Common Stock (Details)

Common Stock (Details) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Stockholders Equity Note [Abstract]
Common stock, shares authorized	300,000,000	300,000,000
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, voting rights	one	one

Common Stock - Shares of common

Common Stock - Shares of common stock reserved for issuance (Details) - shares	Jun. 30, 2016	Dec. 31, 2015
Options outstanding	11,463,532	11,498,747
Unvested early exercised stock options	4,988	12,428
Shares available for issuance under the plan	2,912,809	6,672,236
Shares available for purchase under Employee Stock Purchase Plan	1,424,089	1,561,929
Total	28,500,168	27,578,302
RSUs
Unvested restricted stock outstanding	12,694,750	7,832,962

Share Based Awards (Details)

Share Based Awards (Details) - shares	Jan. 01, 2016	Jun. 30, 2016	Jan. 05, 2016	Dec. 31, 2015	Dec. 20, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted, exercisable term		4 years
Shares of common stock available for issuance		28,500,168		27,578,302
Additional shares authorized		4,436,933
2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expiry term of exercisable options		10 years
2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum annual percentage increase in shares issuable		5.00%
Additional shares authorized	4,066,933
2015 Inducement Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, authorized for issuance					1,600,000
Shares of common stock available for issuance			1,970,000
2015 Inducement Plan | Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock outstanding under the 2015 Inducement Plan		1,970,000
2015 Inducement Plan | RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock outstanding under the 2015 Inducement Plan		1,970,000
2014 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Maximum annual percentage increase in shares issuable		1.00%
Additional shares authorized	813,386
Percentage of purchase price of common stock at fair market value		85.00%
Maximum increase in shares issuable		2,142,857
Minimum | 2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted, exercisable term		3 years
Maximum | 2008 Stock Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options granted, exercisable term		4 years
Maximum | 2014 Equity Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, authorized for issuance		8,142,857
Shares of common stock available for issuance		16,312,202
Maximum | 2014 Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares of common stock, authorized for issuance		2,071,428
Percentage of employee's base compensation permitted to purchase common stock through payroll deductions		15.00%

Share Based Awards - RSUs and B

Share Based Awards - RSUs and Bonus Plans (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Allocated Share Based Compensation Expense	$ 10,545,000		$ 5,952,000	$ 18,794,000	$ 11,088,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Unvested, Beginning Balance		7,832,962		7,832,962
Granted				9,018,307
Vested				(3,092,190)
Cancelled/Forfeited				(1,064,329)
Cancelled/Forfeited				(1,064,329)
Unvested, Ending Balance	12,694,750			12,694,750
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, Beginning Balance		$ 6.66		$ 6.66
Granted (in dollars per share)				3.38
Vested (in dollars per share)				4.90
Cancelled/Forfeited (in dollars per share)				6.28
Unvested, Ending Balance	$ 4.79			$ 4.79
Non-Executive Bonus Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted		1,653,371
Allocated Share Based Compensation Expense	$ 924,000
Executive Bonus Plan 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted				0
2016 Bonus Plans
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Granted				1,653,371
Allocated Share Based Compensation Expense	$ 3,600,000	$ 1,700,000

Share Based Awards - Options ac

Share Based Awards - Options activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Options Activity Rollforward
Number of Shares Available for Issuance, Beginning Balance	6,672,236	6,672,236
Options Outstanding, Number, Beginning Balance	11,498,747	11,498,747
Number of Shares Available for Issuance, Authorized		4,436,933
Number of Shares Available for Issuance, Granted		(1,316,200)
Options Outstanding, Shares Granted		1,316,200
Options exercised		(277,597)
Number of Shares Available for Issuance, Canceled		1,073,818
Number of Shares Available for Issuance, Ending Balance		2,912,809	6,672,236
Options Outstanding, Number, Ending Balance		11,463,532	11,498,747
Vested and exercisable- end of the period		7,792,545
Vested and expected to vest - end of the period		11,016,467
Options Activity, Weighted Average Exercise Price Rollforward
Options Outstanding, Weighted-Average Exercise Price, Beginning Balance	$ 4.51	$ 4.51
Options Outstanding, Weighted Average Exercise Price Granted		3.36
Options Outstanding, Weighted Average Exercise Price Exercised		1.59
Options Outstanding, Weighted Average Exercise Price Canceled		5.32
Options Outstanding, Weighted-Average Exercise Price, Ending Balance		4.37	$ 4.51
Options Outstanding, Weighted-Average Exercise Price, Vested and exercisable		3.89
Options Outstanding, Weighted-Average Exercise Price, Vested and expected to vest		$ 4.34
Options Outstanding, Weighted-Average Remaining Contractual Term (Years)		6 years 5 months 19 days	6 years 10 months 10 days
Options Outstanding, Aggregate Intrinsic Value		$ 4,285	$ 6,256
Options Outstanding, Vested and exercisable, Aggregate Intrinsic Value		4,285
Options Outstanding, Vested and expected to vest, Aggregate Intrinsic Value		$ 4,285
RSUs, excluding Bonus Plans
Options Activity Rollforward
Number of Shares Available for Issuance, other than Options granted		(7,364,936)
RSUs
Options Activity Rollforward
Number of Shares Available for Issuance, other than Options granted		(9,018,307)
Number of Shares Available for Issuance, Restricted stock units canceled		1,064,329
Non-Executive Bonus Plan 2015
Options Activity Rollforward
Number of Shares Available for Issuance, other than Options granted	(1,653,371)
2016 Bonus Plans
Options Activity Rollforward
Number of Shares Available for Issuance, other than Options granted		(1,653,371)

Share Based Awards - Compensati

Share Based Awards - Compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 10,545	$ 5,952	$ 18,794	$ 11,088
Cost of Revenues
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	1,055	443	1,445	873
Research and Development
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	3,812	2,149	6,413	3,877
Sales and Marketing
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2,992	2,193	6,111	4,028
General and Administrative
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$ 2,686	$ 1,167	$ 4,825	$ 2,310

Share Based Awards - Options as

Share Based Awards - Options assumptions (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate	1.50%	1.50%
Expected volatility	42.00%		42.00%
Expected life (in years)	6 years 1 month 6 days		6 years 1 month 6 days
Minimum | Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate			1.40%	1.50%
Expected volatility		43.00%	42.00%	43.00%
Expected life (in years)		5 years 6 months	6 years 1 month 6 days	5 years 6 months
Minimum | Employees Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate			0.60%	0.10%
Expected volatility			39.00%	34.00%
Expected life (in years)			1 year 3 months 18 days	6 months
Maximum | Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate			1.50%	1.60%
Expected volatility		44.00%		45.00%
Expected life (in years)		6 years 1 month 6 days		6 years 1 month 6 days
Maximum | Employees Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Risk-free interest rate				0.60%
Expected volatility				35.00%
Expected life (in years)				2 years

Share Based Awards - Unrecogniz

Share Based Awards - Unrecognized expense (Details) - USD ($)	6 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 57,000,000
Unrecognized compensation cost, weighted-average period of recognition	3 years 1 month 6 days
Shares issued for early exercise of stock options	0
Shares outstanding due to early exercise of unvested stock options	4,988	12,428
Liability for Early Exercised Stock Options	$ 22,000	$ 48,000
Incentive Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 7,000,000
Unrecognized compensation cost, weighted-average period of recognition	2 years 3 months 18 days
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 47,500,000
Unrecognized compensation cost, weighted-average period of recognition	3 years 2 months 12 days
Employees Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost	$ 2,500,000
Unrecognized compensation cost, weighted-average period of recognition	8 months 12 days

Employee Benefit Plan (Details)

Employee Benefit Plan (Details)	6 Months Ended
	Jun. 30, 2016USD ($)
Compensation And Retirement Disclosure [Abstract]
Age restriction of employees	21 years
Employee's contribution to plan 401(k) plan	$ 18,000
Catch up contribution limit for employees age 50 or older	$ 6,000
Minimum age of employees with catch up contribution limit	50 years
Employer contributions to date	$ 0

Commitments and Contingencies -

Commitments and Contingencies - Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Operating Leased Assets [Line Items]
Rent expense			$ 3,400	$ 2,200
Lease Agreements [Member]
Operating Leased Assets [Line Items]
Rent expense	$ 1,600	$ 1,100
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016 (remaining)	3,319		3,319
2,017	5,905		5,905
2,018	5,005		5,005
2,019	4,853		4,853
2,020	4,071		4,071
Thereafter	7,101		7,101
Total	$ 30,254		$ 30,254
Minimum | Lease Agreements [Member]
Operating Leased Assets [Line Items]
Lease agreement expiration year			2,016
Maximum | Lease Agreements [Member]
Operating Leased Assets [Line Items]
Lease agreement expiration year			2,023

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2016USD ($)segment	Jun. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of business activities | segment			1
Revenues	$ 38,881	$ 34,757	$ 76,888	$ 68,251
Property and equipment-net	6,390		6,390		$ 6,572
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,890	17,055	37,295	34,881
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,991	17,702	$ 39,593	33,370
Sales Revenue, Net | United States | Geographic Concentration Risk [Member] | Minimum
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			10.00%
Sales Revenue, Net | Germany | Geographic Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,800	$ 4,100	$ 9,700	$ 7,300
Concentration risk, percentage	12.00%	12.00%	13.00%	11.00%
Computers and appliances | India | Geographic Concentration Risk [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration risk, percentage			22.00%
Property and equipment-net	$ 1,400		$ 1,400

Net Loss per Share (Details)

Net Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Numerator:
Net loss	$ (22,934)	$ (25,013)	$ (42,381)	$ (45,973)
Denominator:
Weighted-average shares outstanding	85,323	78,300	84,160	77,740
Less: weighted average shares subject to repurchase	(6)	(102)	(9)	(141)
Weighted-average shares used to compute basic and diluted net loss per share	85,317	78,198	84,151	77,599
Basic and diluted net loss per share	$ (0.27)	$ (0.32)	$ (0.50)	$ (0.59)

Net Loss Per Share - Antidiluti

Net Loss Per Share - Antidilutive (Details) - shares	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Stock Option [Member]
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities excluded from net loss per share (shares)	24,153,294	21,221,928