Tableau Software 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information Statement - shares	9 Months Ended
	Sep. 30, 2016	Nov. 01, 2016
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Entity Registrant Name	TABLEAU SOFTWARE INC
Entity Central Index Key	1,303,652
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		57,755,482
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		18,336,609

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 864,593	$ 795,900
Accounts receivable, net of allowance for doubtful accounts of $895 and $888	136,940	131,784
Prepaid expenses and other current assets	27,716	16,977
Income taxes receivable	5	78
Total current assets	1,029,254	944,739
Property and equipment, net	91,056	72,350
Goodwill	15,531	932
Deferred income taxes	1,455	1,544
Deposits and other assets	12,154	11,146
Total assets	1,149,450	1,030,711
Current liabilities
Accounts payable	6,804	1,152
Accrued compensation and employee related benefits	62,070	53,003
Other accrued liabilities	40,746	31,838
Income taxes payable	1,496	1,000
Deferred revenue	230,736	185,608
Total current liabilities	341,852	272,601
Deferred revenue	18,685	12,903
Other long-term liabilities	21,872	11,262
Total liabilities	382,409	296,766
Commitments and contingencies (Note 7)
Stockholders' equity
Preferred stock, $0.0001 par value, 10,000,000 shares authorized; none issued	0	0
Additional paid-in capital	965,183	805,804
Accumulated other comprehensive income (loss)	(2,280)	643
Accumulated deficit	(195,870)	(72,509)
Total stockholders' equity	767,041	733,945
Total liabilities and stockholders' equity	1,149,450	1,030,711
Common Class B [Member]
Stockholders' equity
Common stock	2	2
Common Class A [Member]
Stockholders' equity
Common stock	$ 6	$ 5

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets Balance Sheet Parenthetical - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable	$ 895	$ 888
Preferred Stock, Par Value (in USD Per Share)	$ 0.0001	$ 0.0001
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Preferred Stock, Shares Issued	0	0
Common Class B [Member]
Common Stock, Par Value (in USD Per Share)	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	75,000,000	75,000,000
Common Stock, Shares Issued	18,336,609	19,331,666
Common Stock, Shares Outstanding	18,336,609	19,331,666
Common Class A [Member]
Common Stock, Par Value (in USD Per Share)	$ 0.0001	$ 0.0001
Common Stock, Shares Authorized	750,000,000	750,000,000
Common Stock, Shares Issued	57,737,702	53,872,798
Common Stock, Shares Outstanding	57,737,702	53,872,798

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
License		$ 116,655	$ 109,468	$ 329,419	$ 290,629
Maintenance and services		89,402	61,364	246,871	160,208
Total revenues		206,057	170,832	576,290	450,837
Cost of revenues
License		1,760	988	4,393	2,337
Maintenance and services		22,270	18,888	66,994	49,713
Total cost of revenues	[1]	24,030	19,876	71,387	52,050
Gross profit		182,027	150,956	504,903	398,787
Operating expenses
Sales and marketing	[1]	114,530	91,589	340,583	248,840
Research and development	[1]	75,348	54,960	223,757	144,143
General and administrative	[1]	21,505	17,584	63,178	50,753
Total operating expenses		211,383	164,133	627,518	443,736
Operating loss		(29,356)	(13,177)	(122,615)	(44,949)
Other income, net		814	217	3,496	1,404
Loss before income tax expense (benefit)		(28,542)	(12,960)	(119,119)	(43,545)
Income tax expense (benefit)		1,719	413	4,242	(1,166)
Net loss		$ (30,261)	$ (13,373)	$ (123,361)	$ (42,379)
Net loss per share:
Basic (in usd per share)		$ (0.40)	$ (0.19)	$ (1.65)	$ (0.59)
Diluted (in usd per share)		$ (0.40)	$ (0.19)	$ (1.65)	$ (0.59)
Weighted average shares used to compute net loss per share:
Basic (shares)		75,647	72,089	74,743	71,341
Diluted (shares)		75,647	72,089	74,743	71,341
[1]	Includes stock-based compensation expense as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands)Cost of revenues$2,614 $1,856 $8,060 $4,804Sales and marketing17,487 11,966 51,037 31,265Research and development23,372 14,826 67,880 37,374General and administrative3,910 2,925 10,977 8,834

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Operations Parenthetical - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Cost of revenues
Stock-based Compensation Expense	$ 2,614	$ 1,856	$ 8,060	$ 4,804
Sales and marketing
Stock-based Compensation Expense	17,487	11,966	51,037	31,265
Research and development
Stock-based Compensation Expense	23,372	14,826	67,880	37,374
General and administrative
Stock-based Compensation Expense	$ 3,910	$ 2,925	$ 10,977	$ 8,834

Condensed Consolidated Stateme6

Condensed Consolidated Statements of Comprehensive Loss Statement - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (30,261)	$ (13,373)	$ (123,361)	$ (42,379)
Other comprehensive loss:
Foreign currency translation, net	(880)	(584)	(2,923)	(259)
Comprehensive loss	$ (31,141)	$ (13,957)	$ (126,284)	$ (42,638)

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Operating activities
Net loss	$ (123,361)	$ (42,379)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization expense	25,091	16,221
Stock-based compensation expense	137,954	82,277
Excess tax benefit from stock-based compensation	(827)	(4,688)
Deferred income taxes	282	(3,132)
Changes in operating assets and liabilities
Accounts receivable, net	(5,150)	(16,509)
Prepaid expenses, deposits and other assets	(10,355)	(13,166)
Income taxes receivable	72	21
Deferred revenue	49,868	37,807
Accounts payable and accrued liabilities	32,043	26,612
Income taxes payable	517	157
Net cash provided by operating activities	106,134	83,221
Investing activities
Purchases of property and equipment	(42,334)	(32,792)
Business combinations	(16,399)	(1,000)
Net cash used in investing activities	(58,733)	(33,792)
Financing activities
Proceeds from issuance of common stock	21,203	16,110
Excess tax benefit from stock-based compensation	827	4,688
Net cash provided by financing activities	22,030	20,798
Effect of exchange rate changes on cash and cash equivalents	(738)	(649)
Net increase in cash and cash equivalents	68,693	69,578
Cash and cash equivalents
Beginning of period	795,900	680,613
End of period	864,593	750,191
Non-cash activities
Accrued purchases of property and equipment	10,928	8,937
Asset retirement obligations recognized, net	$ 585	$ 447

Description of Business

Description of Business	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Tableau Software, Inc., a Delaware corporation, and its wholly-owned subsidiaries (the "Company," "we," "us" or "our") are headquartered in Seattle, Washington. Our software products put the power of data into the hands of everyday people, allowing a broad population of business users to engage with their data, ask questions, solve problems and create value. Based on innovative core technologies originally developed at Stanford University, our products dramatically reduce the complexity, inflexibility and expense associated with traditional business intelligence applications. We currently offer five key products: Tableau Desktop, a self-service, powerful analytics product for anyone with data; Tableau Server, a business intelligence platform for organizations; Tableau Online, a hosted software-as-a-service ("SaaS") version of Tableau Server; Tableau Public, a free cloud-based platform for analyzing and sharing public data; and Vizable, a free application used to easily analyze data on a tablet.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial information has been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet data as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. The condensed consolidated financial information should be read in conjunction with the consolidated financial statements and notes included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2015 filed with the SEC on February 25, 2016 . In the opinion of management, the accompanying unaudited condensed consolidated financial information includes all normal recurring adjustments necessary for a fair statement of the Company's financial position, results of operations, comprehensive loss and cash flows for the interim periods, but is not necessarily indicative of the results that may be expected for the year ending December 31, 2016 . All intercompany accounts and transactions have been eliminated in consolidation. Reclassifications In the Condensed Consolidated Balance Sheets, certain prior year amounts have been reclassified to conform to the current year presentation. Specifically, "Goodwill" was previously included in the line item "Deposits and other assets" and is now separately stated. There was no change to total assets as a result of the reclassification. Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates include depreciable lives for property and equipment, stock-based compensation, income taxes, accrued liabilities and collectability of accounts receivable. Actual results could differ from those estimates. Risks and Uncertainties Inherent in our business are various risks and uncertainties, including our limited history of operating our business at its current scale and development of advanced technologies in a rapidly changing industry. These risks include our ability to manage our growth and our ability to attract new customers and expand sales to existing customers, as well as other risks and uncertainties. In the event that we do not successfully implement our business plan, certain assets may not be recoverable, certain liabilities may not be paid and investments in our capital stock may not be recoverable. Our success depends upon the acceptance of our technology, development of sales and distribution channels and our ability to generate significant revenues from the sale of our technology. Segments We follow the authoritative literature that established annual and interim reporting standards for an enterprise's operating segments and related disclosures about its products and services, geographic regions and major customers. We operate our business as one operating segment. Our chief operating decision makers are our Chief Executive Officer and Chief Financial Officer, who review financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources. Concentrations of Risk Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We extend credit to customers based upon an evaluation of the customer's financial condition and generally collateral is not required. As of September 30, 2016 and December 31, 2015 , no individual customer accounted for 10% or more of total accounts receivable. For the three and nine months ended September 30, 2016 and 2015 , no individual customer represented 10% or more of our total revenues. Business Combinations As of the date of an acquisition we recognize the identifiable assets acquired and liabilities assumed at fair value. Any excess of the consideration over the fair value of identifiable net assets is recorded as goodwill. Amounts that are not part of the consideration transferred are recognized separately from a business combination and are expensed as incurred. Intangible assets acquired are measured at their acquisition date fair value using valuation techniques that are subject to judgment. Goodwill and Intangible Assets Intangible assets with a finite life are typically amortized over their useful lives which range from three to five years. Goodwill is tested for impairment on an annual basis in the third quarter and more frequently if circumstances indicate that the carrying value may not be recoverable. As part of our goodwill impairment test, we first perform a qualitative assessment to determine whether it is more likely than not that the fair value of our reporting unit is less than its carrying amount. For purposes of this assessment, we consider the enterprise to be the reporting unit. If we determine it is more likely than not that the fair value of our reporting unit is less than its carrying amount, we will perform a two-step quantitative impairment test. The first step is to compare the fair value of our reporting unit to its carrying value. If step one indicates that an impairment may exist, the second step is performed to measure the amount impaired, if any. Impairment is recognized when the carrying amount of goodwill exceeds its fair value. We have not had any impairments of the goodwill balance. Recent Accounting Pronouncements In May 2014, as part of its ongoing efforts to assist in the convergence of GAAP and International Financial Reporting Standards ("IFRS"), the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09 related to revenue recognition. The guidance sets forth a new five-step revenue recognition model that replaces the prior revenue recognition guidance in its entirety and is intended to eliminate numerous industry-specific pieces of revenue recognition guidance that have historically existed in GAAP. The underlying principle of the new standard is that a business or other organization will recognize revenue to depict the transfer of 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. Since the issuance of ASU 2014-09, the FASB has also issued ASU 2016-08, ASU 2016-10 and ASU 2016-12, all of which clarify certain aspects of ASU 2014-09. ASU 2014-09 provides for retrospective or modified prospective methods of initial adoption and is effective for annual periods beginning after December 15, 2017 and interim periods within those annual periods. Early adoption is permitted for annual periods beginning after December 15, 2016 and interim periods within those annual periods. We are currently evaluating the method of adoption and the impact that these standards will have on our consolidated financial statements. In August 2014, the FASB issued ASU 2014-15 related to status as a going concern. The new guidance explicitly requires that management assess an entity's ability to continue as a going concern and may require additional detailed disclosures. ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Though permitted, we do not plan to adopt this standard early. We do not believe that this standard will have an impact on our consolidated financial statements. In April 2015, the FASB issued ASU 2015-05 related to a customer's accounting for fees paid in a cloud computing arrangement. The new guidance requires that management evaluate each cloud computing arrangement in order to determine whether it includes a software license that must be accounted for separately from hosted services. ASU 2015-05 applies the same guidance cloud service providers use to make this determination and also eliminates the existing requirement for customers to account for software licenses they acquire by analogizing to the guidance on leases. ASU 2015-05 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015 and provides the option of applying the guidance prospectively to all arrangements entered into or materially modified after the effective date or on a retrospective basis. We adopted this standard prospectively in the first quarter of 2016. The adoption did not have a significant impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02 related to lease accounting. The new guidance will require lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases that do not meet the definition of a short-term lease. ASU 2016-02 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2018 and requires modified retrospective transition. Early adoption is permitted. We are currently evaluating the impact that this standard will have on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-09 related to stock-based compensation. The new guidance, which simplifies the accounting and presentation for share-based payments, provides for a number of amendments which impact the accounting for income taxes and the accounting for forfeitures. ASU 2016-09 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2016 and requires varied adoption methods for each respective amendment. Though permitted, we do not plan to adopt this standard early. We are currently evaluating the impact that this standard will have on our consolidated financial statements.

Business Combination

Business Combination	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Business Combination	Business Combinations On March 1, 2016, we acquired HyPer, a high-performance main-memory database system, for $16.4 million in cash. Through this acquisition, we acquired new technology, capable of enhancing our key products, and additional engineering talent. We have accounted for this transaction as a business combination, and allocated $1.8 million to the acquired technology intangible asset. The remaining purchase price was recorded to goodwill which is primarily attributable to the synergies between HyPer and our key products. No other assets or liabilities were identified as part of the acquisition. A portion of the goodwill balance associated with this transaction is deductible for U.S. income tax purposes. Pro forma results of operations for this acquisition have not been presented as the effects were not material to our consolidated financial results. Certain employees hired in conjunction with the acquisition receive restricted stock units ("RSUs"). These awards are subject to service conditions, and certain awards are also subject to the completion of a technology milestone. We will account for these awards as a post-business combination expense.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Equity [Abstract]
Stockholders' Equity	Stockholders' Equity Common Stock Our certificate of incorporation, as amended and restated, authorizes us to issue 75,000,000 shares of Class B common stock, at $0.0001 par value per share, and 750,000,000 shares of Class A common stock, at $0.0001 par value per share. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each holder of Class B common stock is entitled to ten votes per share and each holder of Class A common stock is entitled to one vote per share. Shares of Class B common stock may be converted into Class A common stock at any time at the option of the stockholder and are automatically converted upon sale or transfer to Class A common stock, subject to certain limited exceptions. At its discretion, the board of directors may declare dividends on shares of common stock, subject to the rights of our preferred stockholders, if any. Upon liquidation or dissolution, holders of common stock will receive distributions only after preferred stock preferences have been satisfied. Preferred Stock Our certificate of incorporation, as amended and restated, authorizes us to issue 10,000,000 shares of preferred stock at $0.0001 par value per share. Our board of directors has the authority to provide for the issuance of all the shares in one or more series. At its discretion, our board of directors may designate the voting rights and preferences of the preferred stock.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Stock-Based Compensation Our 2004 Equity Incentive Plan (the "2004 Plan") authorized the granting of options to purchase shares of our Class B common stock, RSUs and other stock-based awards to our employees, consultants, officers and directors. Our 2013 Equity Incentive Plan, as amended, (the "2013 Plan" and, together with the 2004 Plan, the "Plans"), which was the successor to our 2004 Plan, authorizes the granting of options to purchase shares of our Class A common stock, RSUs and other stock-based awards to our employees, consultants, officers and directors. Options granted under the Plans may be incentive or nonstatutory stock options. Incentive stock options may only be granted to employees. The term of each option is stated in the award agreement, but shall be no more than ten years from the date of grant. The board of directors determines the period over which options and RSUs become vested. Currently, the vesting period for our options and RSUs is typically four years. Our 2013 Employee Stock Purchase Plan ("2013 ESPP") allows eligible employees to purchase shares of our Class A common stock, at a discount, through payroll deductions of up to 15% of their eligible compensation, subject to plan limitations. The 2013 ESPP currently includes purchase periods approximately six months in duration starting on the first trading date on or after June 1 st and December 1 st of each year. Participants are able to purchase shares of our common stock at 85% of the lower of its fair market value on (i) the first day of the purchase period or on (ii) the purchase date, which is the last day of the purchase period. A summary of the option activity during the nine months ended September 30, 2016 is presented below: Options Outstanding Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Balances at December 31, 2015 5,953,771 $ 8.92 Options granted 75,000 54.87 Options exercised (1,186,096 ) 8.19 Options canceled (287 ) 57.87 Options forfeited (90,862 ) 23.83 Balances at September 30, 2016 4,751,526 $ 9.53 5.41 $ 217,321 Vested and expected to vest at September 30, 2016 4,751,489 $ 9.53 5.41 $ 217,320 Exercisable at September 30, 2016 4,391,379 $ 8.38 5.27 $ 205,899 RSUs entitle the holder to receive shares of Class A common stock as the award vests, which is generally based on length of service. The fair value of an RSU is determined by using the closing price of our Class A common stock as reported on the New York Stock Exchange on the date of grant. Our non-vested RSUs do not have nonforfeitable rights to dividends or dividend equivalents. The intrinsic value is the difference between the current fair value of the stock and the exercise price of the stock option. For awards subject to technology milestones, we will recognize compensation cost over the required service period if it is probable that the technology milestone will be met. If our assessment of the probability of the technology milestone being met changes, we will recognize the impact of the change in estimate in the period of the change. A summary of the RSU activity during the nine months ended September 30, 2016 is presented below: Number of Shares Underlying Outstanding RSUs Weighted-Average Grant-Date Fair Value per RSU Non-Vested outstanding at December 31, 2015 5,406,077 $ 93.61 RSUs granted 4,207,257 44.54 RSUs vested (1,421,083 ) 93.42 RSUs forfeited (496,327 ) 72.76 Non-Vested outstanding at September 30, 2016 7,695,924 $ 68.00 Stock-based compensation expense is amortized using the straight-line method over the requisite service period. As of September 30, 2016 , total unrecognized compensation expense, adjusted for estimated forfeitures, related to stock options and non-vested RSUs was approximately $469.6 million which is expected to be recognized over a period of 2.8 years . The summary of shares available for issuance of equity based awards (including stock options and RSUs) during the nine months ended September 30, 2016 is as follows: Shares Available for Grant 2013 Plan 2013 ESPP Balances at December 31, 2015 6,361,749 3,320,668 Authorized 3,660,223 732,044 Granted (4,282,257 ) (262,668 ) Canceled 287 — Forfeited 587,189 — Balances at September 30, 2016 6,327,191 3,790,044

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The income tax provision for interim periods is generally determined using an estimate of our annual effective tax rate, excluding jurisdictions for which no benefit can be recognized due to valuation allowance, and adjusted for discrete items, if any, in the relevant period. However, given current and expected operating activities during the year, estimating a reliable annual effective tax rate has become increasingly difficult. Even small changes in forecasted results can produce significant changes to our annual effective tax rate. Therefore, we have determined that the actual year to date effective tax rate is the best estimate for the reporting period ended September 30, 2016 . We will continue to utilize this methodology until reliable estimates of the annual effective tax rate can be made. Our effective tax rate is impacted by and differs from the federal statutory rate primarily due to non-deductible stock-based compensation and the adverse effect of losses incurred in certain jurisdictions for which we do not realize a tax benefit. Our effective tax rate may also be adversely impacted by the amount of our income (loss) before income tax expense (benefit) relative to our income tax expense, non-deductible expenses and changes in tax law. Our effective tax rate was (6.0)% and (3.2)% for the three months ended September 30, 2016 and 2015 , respectively, and (3.6)% and 2.7% for the nine months ended September 30, 2016 and 2015 , respectively. The difference in the effective tax rates is attributable to the U.S. federal and state deferred tax asset valuation allowance that was established in the fourth quarter of 2015 and period specific items that impacted the September 30, 2015 effective tax rate, related primarily to disqualifying dispositions on incentive stock options. During the nine months ended September 30, 2016 , we recognized income tax expense of $4.2 million primarily attributable to taxes in foreign jurisdictions. There was no domestic income tax benefit recorded in the current period due to our U.S. federal and state deferred tax asset valuation allowance. During the nine months ended September 30, 2015 , we recognized an income tax benefit of $1.2 million , which included $1.7 million of discrete tax benefits relating to disqualifying dispositions of incentive stock options. On July 27, 2015, the U.S. Tax Court issued an opinion related to litigation in Altera Corp v. Commissioner . This litigation relates to the treatment of stock-based compensation expense in an intercompany cost sharing arrangement with one of Altera's foreign subsidiaries. In its opinion, the U.S. Tax Court invalidated the portion of the Treasury regulations requiring the inclusion of stock-based compensation expense in such intercompany cost-sharing arrangements. On February 19, 2016, the IRS appealed the U.S. Tax Court's decision. As the final resolution of this litigation remains uncertain we have not recorded potentially favorable benefits related to the current or prior periods. We will continue to monitor developments related to this case and the potential impact of those developments on our current and future financial statements.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Operating Lease Commitments As of September 30, 2016 , our principal obligations consisted of obligations outstanding under non-cancellable operating leases that expire at various dates through 2029. There have been no material changes in our principal lease commitments compared to those discussed in Note 7 in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 . Contractual Commitments Our contractual commitments are associated with agreements that are enforceable and legally binding and that specify all significant terms, including fixed or minimum services to be used, fixed, minimum or variable price provisions and the approximate timing of the transaction. Obligations under contracts that we can cancel without a significant penalty are not included. There have been no material changes in our contractual commitments compared to those discussed in Note 7 in our Annual Report on Form 10-K for the fiscal year ended December 31, 2015 . Legal Proceedings We are subject to certain routine legal proceedings, as well as demands and claims that arise in the normal course of our business. We make a provision for a liability relating to legal matters when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. These provisions are reviewed and adjusted to reflect the impacts of negotiations, estimated settlements, legal rulings, advice of legal counsel and other information and events pertaining to a particular matter. We are not aware of any pending legal proceedings that we believe, individually or in the aggregate, would be expected to have a material adverse effect on our business, operating results, or financial condition. We may, in the future, be party to litigation arising in the ordinary course of business, including claims that we allegedly infringe upon third party intellectual property rights. Such claims, even if not meritorious, could result in the expenditure of significant financial and management resources.

Segments and Information about

Segments and Information about Revenues by Geographic Region	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Segments and Information about Revenues by Geographic Area	Segments and Information about Revenues by Geographic Area The following table presents our revenues by geographic region of end users who purchased products or services for the periods presented below: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) United States and Canada $ 147,820 $ 128,667 $ 412,946 $ 340,229 International 58,237 42,165 163,344 110,608 Total revenues $ 206,057 $ 170,832 $ 576,290 $ 450,837

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The following table presents the computation of basic and diluted net loss per share: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands, except per share amounts) Net loss per share - basic and diluted Net loss $ (30,261 ) $ (13,373 ) $ (123,361 ) $ (42,379 ) Weighted average shares outstanding used to compute basic and diluted net loss per share 75,647 72,089 74,743 71,341 Net loss per share - basic and diluted $ (0.40 ) $ (0.19 ) $ (1.65 ) $ (0.59 ) The following shares subject to outstanding awards were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been antidilutive: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) Shares subject to outstanding common stock awards 12,717 11,431 12,717 11,431

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements We categorize assets and liabilities recorded at fair value based upon the level of judgment associated with inputs used to measure their fair value. The levels of the fair value hierarchy are as follows: • 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 quoted prices for identical or similar instruments in markets that are not active and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. • Level 3—Inputs are unobservable inputs based on our own assumptions and valuation techniques used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation. Our assessment of the significance of a particular input to the fair value measurement requires judgment and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy levels. The following table presents the fair value of our financial assets using the fair value hierarchy: September 30, 2016 Description Level 1 Level 2 Level 3 Total (in thousands) Money market funds $ 826,173 $ — $ — $ 826,173 December 31, 2015 Description Level 1 Level 2 Level 3 Total (in thousands) Money market funds $ 736,806 $ — $ — $ 736,806 We did not have any investments in prime money market funds as of September 30, 2016 . We have no material financial assets or liabilities measured using Level 2 or Level 3 inputs.

Subsequent Events Subsequent Ev

Subsequent Events Subsequent Events	9 Months Ended
	Sep. 30, 2016
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On October 27, 2016, our board of directors authorized a stock repurchase program whereby we can repurchase up to $200 million of our outstanding Class A common stock.

Summary of Significant Accoun19

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial information has been prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. Certain information and note disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet data as of December 31, 2015 was derived from audited financial statements, but does not include all disclosures required by GAAP. The condensed consolidated financial information should be read in conjunction with the consolidated financial statements and notes included in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2015 filed with the SEC on February 25, 2016 . In the opinion of management, the accompanying unaudited condensed consolidated financial information includes all normal recurring adjustments necessary for a fair statement of the Company's financial position, results of operations, comprehensive loss and cash flows for the interim periods, but is not necessarily indicative of the results that may be expected for the year ending December 31, 2016 . All intercompany accounts and transactions have been eliminated in consolidation.
Reclassification	Reclassifications In the Condensed Consolidated Balance Sheets, certain prior year amounts have been reclassified to conform to the current year presentation. Specifically, "Goodwill" was previously included in the line item "Deposits and other assets" and is now separately stated. There was no change to total assets as a result of the reclassification.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. These estimates include depreciable lives for property and equipment, stock-based compensation, income taxes, accrued liabilities and collectability of accounts receivable. Actual results could differ from those estimates.
Risk And Uncertainties	Risks and Uncertainties Inherent in our business are various risks and uncertainties, including our limited history of operating our business at its current scale and development of advanced technologies in a rapidly changing industry. These risks include our ability to manage our growth and our ability to attract new customers and expand sales to existing customers, as well as other risks and uncertainties. In the event that we do not successfully implement our business plan, certain assets may not be recoverable, certain liabilities may not be paid and investments in our capital stock may not be recoverable. Our success depends upon the acceptance of our technology, development of sales and distribution channels and our ability to generate significant revenues from the sale of our technology.
Segments	Segments We follow the authoritative literature that established annual and interim reporting standards for an enterprise's operating segments and related disclosures about its products and services, geographic regions and major customers. We operate our business as one operating segment. Our chief operating decision makers are our Chief Executive Officer and Chief Financial Officer, who review financial information presented on a consolidated basis for purposes of making operating decisions, assessing financial performance and allocating resources.
Concentrations of Risk	Concentrations of Risk Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash and cash equivalents and accounts receivable. We extend credit to customers based upon an evaluation of the customer's financial condition and generally collateral is not required. As of September 30, 2016 and December 31, 2015 , no individual customer accounted for 10% or more of total accounts receivable. For the three and nine months ended September 30, 2016 and 2015 , no individual customer represented 10% or more of our total revenues.
Business Combinations	Business Combinations As of the date of an acquisition we recognize the identifiable assets acquired and liabilities assumed at fair value. Any excess of the consideration over the fair value of identifiable net assets is recorded as goodwill. Amounts that are not part of the consideration transferred are recognized separately from a business combination and are expensed as incurred. Intangible assets acquired are measured at their acquisition date fair value using valuation techniques that are subject to judgment.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Intangible assets with a finite life are typically amortized over their useful lives which range from three to five years. Goodwill is tested for impairment on an annual basis in the third quarter and more frequently if circumstances indicate that the carrying value may not be recoverable. As part of our goodwill impairment test, we first perform a qualitative assessment to determine whether it is more likely than not that the fair value of our reporting unit is less than its carrying amount. For purposes of this assessment, we consider the enterprise to be the reporting unit. If we determine it is more likely than not that the fair value of our reporting unit is less than its carrying amount, we will perform a two-step quantitative impairment test. The first step is to compare the fair value of our reporting unit to its carrying value. If step one indicates that an impairment may exist, the second step is performed to measure the amount impaired, if any. Impairment is recognized when the carrying amount of goodwill exceeds its fair value. We have not had any impairments of the goodwill balance.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, as part of its ongoing efforts to assist in the convergence of GAAP and International Financial Reporting Standards ("IFRS"), the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09 related to revenue recognition. The guidance sets forth a new five-step revenue recognition model that replaces the prior revenue recognition guidance in its entirety and is intended to eliminate numerous industry-specific pieces of revenue recognition guidance that have historically existed in GAAP. The underlying principle of the new standard is that a business or other organization will recognize revenue to depict the transfer of 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. Since the issuance of ASU 2014-09, the FASB has also issued ASU 2016-08, ASU 2016-10 and ASU 2016-12, all of which clarify certain aspects of ASU 2014-09. ASU 2014-09 provides for retrospective or modified prospective methods of initial adoption and is effective for annual periods beginning after December 15, 2017 and interim periods within those annual periods. Early adoption is permitted for annual periods beginning after December 15, 2016 and interim periods within those annual periods. We are currently evaluating the method of adoption and the impact that these standards will have on our consolidated financial statements. In August 2014, the FASB issued ASU 2014-15 related to status as a going concern. The new guidance explicitly requires that management assess an entity's ability to continue as a going concern and may require additional detailed disclosures. ASU 2014-15 is effective for the annual period ending after December 15, 2016, and for annual periods and interim periods thereafter. Though permitted, we do not plan to adopt this standard early. We do not believe that this standard will have an impact on our consolidated financial statements. In April 2015, the FASB issued ASU 2015-05 related to a customer's accounting for fees paid in a cloud computing arrangement. The new guidance requires that management evaluate each cloud computing arrangement in order to determine whether it includes a software license that must be accounted for separately from hosted services. ASU 2015-05 applies the same guidance cloud service providers use to make this determination and also eliminates the existing requirement for customers to account for software licenses they acquire by analogizing to the guidance on leases. ASU 2015-05 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2015 and provides the option of applying the guidance prospectively to all arrangements entered into or materially modified after the effective date or on a retrospective basis. We adopted this standard prospectively in the first quarter of 2016. The adoption did not have a significant impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02 related to lease accounting. The new guidance will require lessees to recognize right-of-use assets and lease liabilities on the balance sheet for operating leases that do not meet the definition of a short-term lease. ASU 2016-02 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2018 and requires modified retrospective transition. Early adoption is permitted. We are currently evaluating the impact that this standard will have on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-09 related to stock-based compensation. The new guidance, which simplifies the accounting and presentation for share-based payments, provides for a number of amendments which impact the accounting for income taxes and the accounting for forfeitures. ASU 2016-09 is effective for annual periods, including interim periods within those annual periods, beginning after December 15, 2016 and requires varied adoption methods for each respective amendment. Though permitted, we do not plan to adopt this standard early. We are currently evaluating the impact that this standard will have on our consolidated financial statements.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Option Activity	A summary of the option activity during the nine months ended September 30, 2016 is presented below: Options Outstanding Shares Weighted Average Exercise Price Per Share Weighted Average Remaining Contractual Term Aggregate Intrinsic Value (in years) (in thousands) Balances at December 31, 2015 5,953,771 $ 8.92 Options granted 75,000 54.87 Options exercised (1,186,096 ) 8.19 Options canceled (287 ) 57.87 Options forfeited (90,862 ) 23.83 Balances at September 30, 2016 4,751,526 $ 9.53 5.41 $ 217,321 Vested and expected to vest at September 30, 2016 4,751,489 $ 9.53 5.41 $ 217,320 Exercisable at September 30, 2016 4,391,379 $ 8.38 5.27 $ 205,899
Summary of RSU Activity	A summary of the RSU activity during the nine months ended September 30, 2016 is presented below: Number of Shares Underlying Outstanding RSUs Weighted-Average Grant-Date Fair Value per RSU Non-Vested outstanding at December 31, 2015 5,406,077 $ 93.61 RSUs granted 4,207,257 44.54 RSUs vested (1,421,083 ) 93.42 RSUs forfeited (496,327 ) 72.76 Non-Vested outstanding at September 30, 2016 7,695,924 $ 68.00
Summary of Shares Available for Grant	The summary of shares available for issuance of equity based awards (including stock options and RSUs) during the nine months ended September 30, 2016 is as follows: Shares Available for Grant 2013 Plan 2013 ESPP Balances at December 31, 2015 6,361,749 3,320,668 Authorized 3,660,223 732,044 Granted (4,282,257 ) (262,668 ) Canceled 287 — Forfeited 587,189 — Balances at September 30, 2016 6,327,191 3,790,044

Segments and Information abou21

Segments and Information about Revenues by Geographic Region (Tables)	9 Months Ended
	Sep. 30, 2016
Segment Reporting [Abstract]
Reconciliation of Revenue from Segments to Consolidated	The following table presents our revenues by geographic region of end users who purchased products or services for the periods presented below: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) United States and Canada $ 147,820 $ 128,667 $ 412,946 $ 340,229 International 58,237 42,165 163,344 110,608 Total revenues $ 206,057 $ 170,832 $ 576,290 $ 450,837

Net Income (Loss) Per Share (Ta

Net Income (Loss) Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Schedule of Computation of Earnings Per Share, Basic and Diluted	The following table presents the computation of basic and diluted net loss per share: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands, except per share amounts) Net loss per share - basic and diluted Net loss $ (30,261 ) $ (13,373 ) $ (123,361 ) $ (42,379 ) Weighted average shares outstanding used to compute basic and diluted net loss per share 75,647 72,089 74,743 71,341 Net loss per share - basic and diluted $ (0.40 ) $ (0.19 ) $ (1.65 ) $ (0.59 )
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share	The following shares subject to outstanding awards were excluded from the computation of diluted net loss per share for the periods presented as their effect would have been antidilutive: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 (in thousands) Shares subject to outstanding common stock awards 12,717 11,431 12,717 11,431

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
Fair Value Disclosures [Abstract]
Fair Value of Financial Assets	The following table presents the fair value of our financial assets using the fair value hierarchy: September 30, 2016 Description Level 1 Level 2 Level 3 Total (in thousands) Money market funds $ 826,173 $ — $ — $ 826,173 December 31, 2015 Description Level 1 Level 2 Level 3 Total (in thousands) Money market funds $ 736,806 $ — $ — $ 736,806

Description of Business Narrati

Description of Business Narrative (Details)	Sep. 30, 2016product
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of Key Products	5

Summary of Significant Accoun25

Summary of Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016customer	Sep. 30, 2015customer	Sep. 30, 2016USD ($)segmentcustomer	Sep. 30, 2015customer	Dec. 31, 2015customer
Accounting Policies [Abstract]
Number of Operating Segments | segment			1
Finite-Lived Intangible Assets [Line Items]
Goodwill Impairment | $			$ 0
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition-Related Intangible Asset, Useful Life			3 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Acquisition-Related Intangible Asset, Useful Life			5 years
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Finite-Lived Intangible Assets [Line Items]
Number of Customers with more than 10% of Period Receivables	0		0		0
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Finite-Lived Intangible Assets [Line Items]
Number of Customers with More than 10% of Period Revenue	0	0	0	0

Business Combination (Details)

Business Combination (Details) $ in Millions	Mar. 01, 2016USD ($)
Business Combinations [Abstract]
Business Combination Cash Paid, Net	$ 16.4
Business Combination Acquired Technology Intangible Assets	$ 1.8

Stockholders' Equity (Details)

Stockholders' Equity (Details)	9 Months Ended
	Sep. 30, 2016votes$ / sharesshares	Dec. 31, 2015$ / sharesshares
Class of Stock [Line Items]
Preferred Stock, Shares Authorized | shares	10,000,000	10,000,000
Preferred Stock, Par Value (in USD Per Share) | $ / shares	$ 0.0001	$ 0.0001
Common Class B [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized | shares	75,000,000	75,000,000
Common Stock, Par Value (in USD Per Share) | $ / shares	$ 0.0001	$ 0.0001
Votes per Share Entitled to Share Holder | votes	10
Common Class A [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized | shares	750,000,000	750,000,000
Common Stock, Par Value (in USD Per Share) | $ / shares	$ 0.0001	$ 0.0001
Votes per Share Entitled to Share Holder | votes	1

Stock-Based Compensation (Detai

Stock-Based Compensation (Details - Options) $ / shares in Units, $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options Outstanding, Shares, Beginning of Period | shares	5,953,771
Options Outstanding, Shares, Options Granted | shares	75,000
Options Outstanding, Shares, Options Exercised | shares	(1,186,096)
Options Outstanding, Shares, Options Canceled | shares	(287)
Options Outstanding, Shares, Options Forfeited | shares	(90,862)
Options Outstanding, Shares, End of Period | shares	4,751,526
Options Outstanding, Shares, Vested and Expected to Vest | shares	4,751,489
Options Outstanding, Shares, Exercisable | shares	4,391,379
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Options Outstanding, Weighted Average Exercise Price, Beginning of Period, USD per Share | $ / shares	$ 8.92
Options Outstanding, Weighted Average Exercise Price, Options Granted, USD per Share | $ / shares	54.87
Options Outstanding, Weighted Average Exercise Price, Options Exercised, USD per Share | $ / shares	8.19
Options Outstanding, Weighted Average Exercise Price, Options Canceled, USD per Share | $ / shares	57.87
Options Outstanding, Weighted Average Exercise Price, Options Forfeited, USD per Share | $ / shares	23.83
Options Outstanding, Weighted Average Exercise Price, End of Period, USD per Share | $ / shares	9.53
Options Outstanding, Weighted Average Exercise Price Per Share, Vested and Expected to Vest, USD per Share | $ / shares	9.53
Options Outstanding, Weighted Average Exercise Price Per Share, Exercisable, USD per Share | $ / shares	$ 8.38
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options Outstanding, Weighted Average Remaining Contractual Term, End of Period (in years)	5 years 4 months 27 days
Options Outstanding, Weighted Average Remaining Contractual Term, Vested and Expected to Vest (in years)	5 years 4 months 27 days
Options Outstanding, Weighted Average Remaining Contractual Term, Exercisable (in years)	5 years 3 months 7 days
Options Outstanding, Aggregate Intrinsic Value, End of Period | $	$ 217,321
Options Outstanding, Aggregate Intrinsic Value, Vested and Expected to Vest | $	217,320
Options Outstanding, Aggregate Intrinsic Value, Exercisable | $	$ 205,899

Stock Based Compensation (Detai

Stock Based Compensation (Details - RSUs) - Restricted Stock Units (RSUs) [Member]	9 Months Ended
	Sep. 30, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
RSU Shares Outstanding, Beginning of Period | shares	5,406,077
RSUs granted, Shares | shares	4,207,257
RSUs vested, Shares | shares	(1,421,083)
RSUs forfeited, Shares | shares	(496,327)
RSU Shares Outstanding, End of Period | shares	7,695,924
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Weighted Average Exercise Price [Roll Forward]
Weighted Average Fair Value, Beginning of Period, USD per Share | $ / shares	$ 93.61
Weighted Average Fair Value, RSUs Granted, USD per Share | $ / shares	44.54
Weighted Average Fair Value, RSUs Vested, USD per Share | $ / shares	93.42
Weighted Average Fair Value, RSUs Forfeited, USD per Share | $ / shares	72.76
Weighted Average Fair Value, End of Period, USD per Share | $ / shares	$ 68

Stock-Based Compensation (Det30

Stock-Based Compensation (Details - Narrative) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option expiration period (in years)	10 years
Vesting period (in years)	4 years
Unrecognized compensation expense	$ 469.6
Recognition period (in years)	2 years 9 months 18 days
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Maximum Payroll Deduction, Percent	15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Purchase Period	6 months
Share-based Compensation Arrangement by Share-based Payment Award, Purchase Price of Common Stock, Percent	85.00%

Stock-Based Compensation (Det31

Stock-Based Compensation (Details - Shares Available)	9 Months Ended
	Sep. 30, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Awards, Outstanding [Roll Forward]
Granted, Shares	(75,000)
2013 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Awards, Outstanding [Roll Forward]
Equity Based Awards, Beginning of Period, Shares	6,361,749
Authorized, Shares	3,660,223
Granted, Shares	(4,282,257)
Canceled, Shares	287
Forfeited, Shares	587,189
Equity Based Awards, End of Period, Shares	6,327,191
ESPP [Member] | Common Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Awards, Outstanding [Roll Forward]
Equity Based Awards, Beginning of Period, Shares	3,320,668
Authorized, Shares	732,044
Granted, Shares	(262,668)
Canceled, Shares	0
Forfeited, Shares	0
Equity Based Awards, End of Period, Shares	3,790,044

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective tax rate	(6.00%)	(3.20%)	(3.60%)	2.70%
Income tax expense (benefit)	$ 1,719	$ 413	$ 4,242	$ (1,166)
Discrete tax benefit related to dispositions on incentive stock options				$ 1,700

Segments and Information abou33

Segments and Information about Revenues by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 206,057	$ 170,832	$ 576,290	$ 450,837
United States and Canada [Member]
Segment Reporting Information [Line Items]
Revenues	147,820	128,667	412,946	340,229
International [Member]
Segment Reporting Information [Line Items]
Revenues	$ 58,237	$ 42,165	$ 163,344	$ 110,608

Net Income (Loss) Per Share (De

Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Net loss	$ (30,261)	$ (13,373)	$ (123,361)	$ (42,379)
Weighted average shares outstanding used to compute basic and diluted net loss per share	75,647	72,089	74,743	71,341
Net loss per share - basic and diluted, USD per share	$ (0.40)	$ (0.19)	$ (1.65)	$ (0.59)
Antidilutive shares excluded from computation of diluted net loss	12,717	11,431	12,717	11,431

Fair Value Measurements (Detail

Fair Value Measurements (Details) - Money Market Funds [Member] - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments Fair Value	$ 826,173	$ 736,806
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments Fair Value	826,173	736,806
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments Fair Value	0	0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments Fair Value	$ 0	$ 0

Subsequent Events Subsequent 36

Subsequent Events Subsequent Events (Details) $ in Millions	Oct. 27, 2016USD ($)
Subsequent Event
Subsequent Event [Line Items]
Authorized Class A Common Stock Repurchase Amount	$ 200