GoPro (GPRO) 10-Q 29 Oct 15 2015 Q3 Quarterly report Financial data

Document, Entity and Informatio

Document, Entity and Information	9 Months Ended
	Sep. 30, 2015shares
Class of Stock [Line Items]
Entity Registrant Name	GoPro, Inc.
Entity Central Index Key	1,500,435
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q3
Amendment Flag	false
Common Class A [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding	101,654,028
Common Class B [Member]
Class of Stock [Line Items]
Entity Common Stock, Shares Outstanding	35,869,701

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 279,969	$ 319,929
Marketable securities	233,133	102,327
Accounts receivable, net	120,666	183,992
Inventory	289,521	153,026
Prepaid expenses and other current assets	79,976	63,769
Total current assets	1,003,265	823,043
Property and equipment, net	67,644	41,556
Intangible assets, net	32,547	2,937
Goodwill	57,095	14,095
Other long-term assets	48,730	36,060
Total assets	1,209,281	917,691
Current liabilities:
Accounts payable	159,901	126,240
Accrued liabilities	166,116	115,775
Deferred revenue	13,095	14,022
Income taxes payable	6,630	2,732
Total current liabilities	345,742	258,769
Other long-term liabilities	32,849	17,718
Total liabilities	$ 378,591	$ 276,487
Commitments, contingencies and guarantees (see Note 9)
Stockholders’ equity:
Common stock and additional paid-in capital, $0.0001 par value, 500,000 Class A shares authorized,101,654 and 52,091 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively; 150,000 Class B shares authorized, 35,870 and 77,023 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 651,904	$ 533,000
Retained earnings	178,786	108,204
Total stockholders’ equity	830,690	641,204
Total liabilities and stockholders’ equity	$ 1,209,281	$ 917,691

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common Class A [Member]
Common stock, shares authorized	500,000,000	500,000,000
Common Stock, shares, issued	101,654,000	52,091,000
Common stock, shares, outstanding	101,654,000	52,091,000
Common Class B [Member]
Common stock, shares authorized	150,000,000	150,000,000
Common Stock, shares, issued	35,870,000	77,023,000
Common stock, shares, outstanding	35,870,000	77,023,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Income Statement [Abstract]
Revenue	$ 400,340	$ 279,971	$ 1,183,368	$ 760,292
Cost of revenue	213,710	155,932	638,665	436,870
Gross profit	186,630	124,039	544,703	323,422
Operating expenses:
Research and development	67,372	42,376	175,262	105,778
Sales and marketing	66,427	48,109	186,290	133,151
General and administrative	25,195	20,097	87,109	71,146
Total operating expenses	158,994	110,582	448,661	310,075
Operating income	27,636	13,457	96,042	13,347
Other expense, net	(363)	(1,784)	(2,485)	(4,945)
Income before income taxes	27,273	11,673	93,557	8,402
Income tax expense (benefit)	8,474	(2,947)	22,975	2,574
Net income	18,799	14,620	70,582	5,828
Less: net income allocable to participating securities	0	(36)	0	(1,022)
Net income attributable to common stockholders—basic	18,799	14,584	70,582	4,806
Add: net income allocable to dilutive participating securities	0	1	0	10
Net income attributable to common stockholders—diluted	$ 18,799	$ 14,585	$ 70,582	$ 4,816
Net income per share attributable to common stockholders - Basic (in dollars per share)	$ 0.14	$ 0.12	$ 0.53	$ 0.05
Net income per share attributable to common stockholders - Diluted (in dollars per share)	$ 0.13	$ 0.10	$ 0.48	$ 0.04
Weighted-average shares used to compute net income per share attributable to common stockholders - Basic (in shares)	135,800	125,713	133,755	96,905
Weighted-average shares used to compute net income per share attributable to common stockholders - Diluted (in shares)	146,055	145,186	147,201	115,578

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Statement of Cash Flows [Abstract]
Net income	$ 70,582	$ 5,828
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	19,385	12,769
Stock-based compensation	62,560	52,143
Excess tax benefit from stock-based compensation	(32,550)	(23,592)
Foreign currency remeasurement and transaction losses	2,033	0
Deferred income taxes	(6,888)	(3,808)
Other	2,400	1,608
Changes in operating assets and liabilities:
Accounts receivable, net	63,348	28,106
Inventory	(136,294)	(5,020)
Prepaids and other assets	(20,027)	(25,842)
Accounts payable and other liabilities	113,141	11,325
Deferred revenue	(927)	215
Net cash provided by operating activities	136,763	53,732
Investing activities:
Purchases of property and equipment, net	(32,326)	(22,566)
Purchases of marketable securities	(207,186)	0
Sales and maturities of marketable securities	74,491	0
Acquisitions, net of cash acquired	(65,405)	(3,200)
Net cash used in investing activities	(230,426)	(25,766)
Financing activities:
Proceeds from issuance of common stock, net of repurchases	35,495	203,228
Taxes paid related to net share settlement of equity awards	(11,688)	0
Excess tax benefit from stock-based compensation	32,550	23,592
Payment of deferred public offering and debt issuance costs	(903)	(4,447)
Repayment of debt	0	(114,000)
Net cash provided by financing activities	55,454	108,373
Effect of exchange rate changes on cash and cash equivalents	(1,751)	0
Net increase (decrease) in cash and cash equivalents	(39,960)	136,339
Cash and cash equivalents at beginning of period	319,929	101,410
Cash and cash equivalents at end of period	$ 279,969	$ 237,749

Business overview

Business overview	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business overview	Business overview GoPro, Inc. (GoPro or the Company) makes mountable and wearable cameras and accessories, which the Company refers to as capture devices. GoPro also develops and provides free software solutions, the GoPro App (mobile) and GoPro Studio (desktop), that help consumers create, manage, and share GoPro content. The Company’s capture devices are sold globally through retailers, wholesale distributors, and on the Company’s website. The Company's global corporate headquarters are located in San Mateo, California.

Summary of significant accounti

Summary of significant accounting policies	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and in accordance with the interim period reporting requirements of Form 10-Q. The unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) that management believes are necessary for the fair presentation of the Company's financial condition, results of operations, and cash flows for the periods presented, but are not necessarily indicative of the results expected for the full fiscal year or any other future period. The condensed consolidated balance sheet at December 31, 2014 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. This quarterly report should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2014 (2014 Annual Report). There have been no significant changes in the Company’s accounting policies from those disclosed in the footnotes to the audited financial statements contained in its 2014 Annual Report. Principles of consolidation The condensed consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. Unless otherwise specified, references to the Company are references to GoPro, Inc. and its consolidated subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Use of estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the Company’s condensed consolidated financial statements and accompanying notes. The Company regularly evaluates estimates and assumptions in several areas, including those related to: revenue recognition (including sales returns, web-based sale deliveries at period-end, implied post contract support, and marketing allowances), collectability of accounts receivable, stock-based compensation, inventory valuation, product warranty liabilities, the valuation and useful lives of intangible assets and property and equipment, goodwill, and income taxes. The Company bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ materially from management's estimates. To the extent there are material differences between the estimates and the actual results, future results of operations could be affected. Comprehensive income For all periods presented, comprehensive income approximated net income. Therefore, the condensed consolidated statements of comprehensive income have been omitted from the condensed consolidated financial statements. Prior period reclassifications Reclassifications of certain prior period amounts in the condensed consolidated financial statements have been made to conform to the current period presentation. Recent accounting pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers, which amends the existing accounting standards for revenue recognition. ASU 2014-09 is based on principles that govern the recognition of revenue at an amount to which an entity expects to be entitled when products and services are transferred to customers. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (ASU 2015-14), which defers the effective date by one year while providing the option to adopt the standard on the original effective date. Accordingly, the Company may adopt the standard either in its first quarter of 2017 or its first quarter of 2018 and it can be adopted either retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. The Company is currently evaluating the timing and the impact the adoption of ASU 2014-09 will have on the Company's consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805), which amends the existing guidance for business combinations. Under the updated guidance, the acquirer in a business combination is required to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. This new standard will become effective for the Company on January 1, 2016, and will be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update. The Company is currently evaluating the impact the adoption of ASU 2015-16 will have on the Company's consolidated financial statements.

Condensed consolidated financia

Condensed consolidated financial statement details	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Condensed consolidated financial statement details	Condensed consolidated financial statement details Inventory Inventory consisted of the following: (in thousands) September 30, December 31, Components $ 14,478 $ 4,324 Finished goods 275,043 148,702 Total inventory $ 289,521 $ 153,026 Property and equipment, net Property and equipment, net consisted of the following: (in thousands) Useful life (in years) September 30, December 31, Leasehold improvements 3–7 $ 24,050 $ 22,787 Computers, software, equipment and furniture 2–4 42,936 24,636 Tooling 1–2 19,876 16,159 Construction in progress 19,507 3,944 Tradeshow equipment and other 2-5 4,016 3,830 Total 110,385 71,356 Less: Accumulated depreciation and amortization (42,741 ) (29,800) Property and equipment, net $ 67,644 $ 41,556 Construction in progress includes costs primarily related to construction of leasehold improvements to the Company's office facilities. No interest was capitalized during the three and nine months ended September 30, 2015 and 2014. Acquisitions and acquired intangible assets and goodwill During the nine months ended September 30, 2015 , the Company completed several acquisitions qualifying as business combinations for aggregate consideration of $70.2 million , most of which was cash consideration. These acquisitions were not material to the Company's condensed consolidated financial statements, either individually or in the aggregate, and therefore actual and proforma disclosures under the applicable accounting guidance have not been presented. The following table summarizes the preliminary allocation of the fair values of the assets acquired and liabilities assumed, and the related useful lives, where applicable: (in thousands) Estimated Fair value Purchased technology 4 - 6 years $ 25,676 In-process research and development (IPR&D) 6,600 Net liabilities assumed (353 ) Deferred income tax liabilities (4,676 ) Net assets acquired 27,247 Goodwill 43,000 Total fair value consideration $ 70,247 Goodwill represents the excess of the purchase price over the fair value of the net assets acquired and is primarily attributable to expected synergies in the technologies that can be leveraged by the Company in future product offerings. Goodwill is not expected to be deductible for tax purposes. The following table summarizes the Company's acquired intangible assets: September 30, 2015 December 31, 2014 (in thousands) Gross carrying amount Accumulated amortization Net carrying value Net carrying value Purchased technology and other amortizable assets $ 32,951 $ (7,019 ) $ 25,932 $ 2,922 IPR&D and other non-amortizable assets 6,615 — 6,615 15 Total intangible assets $ 39,566 $ (7,019 ) $ 32,547 $ 2,937 As of September 30, 2015 , technological feasibility has not been established for IPR&D assets; they have no alternative future use and, as such, continue to be accounted for as indefinite-lived intangible assets. Amortization expense for the nine months ended September 30, 2015 and 2014 was $2.7 million and $0.8 million , respectively. Estimated amortization expense for future periods as of September 30, 2015 , is as follows: (in thousands) Total Year ending December 31, Remainder of 2015 $ 1,521 2016 5,956 2017 5,172 2018 4,779 2019 4,269 Thereafter 4,235 $ 25,932 The carrying amount of goodwill was $57.1 million and $14.1 million as of September 30, 2015 and December 31, 2014, respectively. The increase during the nine months ended September 30, 2015 was entirely attributable to goodwill acquired. The Company did not have any goodwill impairments during the periods presented.

Fair value measurements

Fair value measurements	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy are summarized as follows: September 30, 2015 December 31, 2014 (in thousands) Level 1 Level 2 Total Level 1 Level 2 Total Cash equivalents (1) : Money market funds $ 12,173 $ — $ 12,173 $ 80,968 $ — $ 80,968 Corporate debt securities — 100 100 — 2,000 2,000 Total cash equivalents $ 12,173 $ 100 $ 12,273 $ 80,968 $ 2,000 $ 82,968 Marketable securities: U.S. treasury securities $ 3,014 $ — $ 3,014 $ 1,994 $ — $ 1,994 U.S. agency securities — 19,565 19,565 — 7,020 7,020 Commercial paper — 997 997 — 2,497 2,497 Corporate debt securities — 197,554 197,554 — — — Municipal securities — 12,003 12,003 — 90,816 90,816 Total marketable securities $ 3,014 $ 230,119 $ 233,133 $ 1,994 $ 100,333 $ 102,327 (1) Included in “cash and cash equivalents” in the accompanying condensed consolidated balance sheets as of September 30, 2015 and December 31, 2014, in addition to cash of $267.7 million and $237.0 million , respectively . The Company classifies its cash equivalents and marketable securities as Level 1 or Level 2 within the fair value hierarchy. The fair value of Level 1 financial instruments, which are traded in active markets, is based on quoted market prices for identical instruments. The fair value of Level 2 financial instruments is obtained from an independent pricing service, which may use quoted market prices for identical or comparable instruments or model driven valuations using observable market data or inputs corroborated by observable market data. The Company's procedures include controls to ensure that appropriate fair values are recorded, including comparing the fair values obtained from the Company's pricing service against fair values obtained from other independent sources. At September 30, 2015 and December 31, 2014 , the Company had no financial assets or liabilities that were classified as Level 3, which are valued based on inputs supported by little or no market activity. During the nine months ended September 30, 2015 , the Company had no transfers of financial assets between levels. At September 30, 2015 and December 31, 2014, the amortized cost of the Company's cash equivalents and marketable securities approximated their fair value and there were no material unrealized gains/(losses) either individually or in total. At September 30, 2015 , $134.6 million of the Company's marketable securities had a contractual maturity of one year or less and $98.5 million had a contractual maturity of one to two years.

Stockholders' equity

Stockholders' equity	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based compensation	Stockholders' equity Stock repurchase program On September 30, 2015, the Company's Board of Directors authorized a program to repurchase up to $300 million of the Company's Class A common stock. The repurchase program, which expires in September 2016, does not obligate the Company to acquire any specific number of shares and may be discontinued at any time by the Board of Directors. Share repurchases under the program may be made from time-to-time through open market transactions, block trades, privately negotiated transactions or otherwise, including under plans complying with both Rule 10b-18 and Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The Company has not repurchased any shares under the program. Stock contributions In the second quarter of 2015, the CEO contributed an aggregate 4,858,180 shares of Class B common stock to the Company without consideration per the terms of a Contribution Agreement dated December 28, 2011, and amended on May 11, 2015. Under the original Contribution Agreement, the CEO agreed to contribute back to the Company from time-to-time the same number of shares of common stock as are issued to a certain Company employee upon the exercise of certain stock options held by such employee. Pursuant to this agreement, the CEO contributed back to the Company 180,000 shares of Class B common stock in April 2015. In May 2015, the CEO contributed back to the Company 4,678,180 shares of Class B common stock pursuant to the amended agreement, representing all of the then remaining shares subject to the contribution obligations. All of the shares contributed by the CEO were retired in the second quarter of 2015. Equity incentive plans The Company has outstanding equity grants from its three stock-based employee compensation plans: the 2014 Equity Incentive Plan (2014 Plan), the 2010 Equity Incentive Plan (2010 Plan), and the 2014 Employee Stock Purchase Plan (ESPP). No new options or awards have been granted under the 2010 Plan since June 2014. Outstanding options and awards under the 2010 plan continue to be subject to the terms and conditions of the 2010 Plan. The 2014 Plan serves as the successor to the 2010 Plan and provides for the granting of incentive and nonqualified stock options, restricted stock awards (RSAs), restricted stock units (RSUs), stock appreciation rights, stock bonus awards, and performance awards to qualified employees, non-employee directors, and consultants. Options granted under the 2014 Plan generally expire within 10 years from the date of grant and generally vest over four years. Options with performance or market-based conditions are generally subject to a required service period along with the performance or market condition. RSUs granted under the 2014 Plan generally vest annually over a four year period based upon continued service and are settled at vesting in shares of the Company's Class A common stock. The ESPP allows eligible employees to purchase shares of the Company's Class A common stock through payroll deductions at a price equal to 85% of the lesser of the fair market values of the stock as of the first date or the ending date of each six-month offering periods. For additional information regarding the Company's equity incentive plans, please refer to the footnotes to the audited financial statements contained in its 2014 Annual Report. Stock option activity A summary of the Company’s stock option activity and related information is as follows: Options outstanding (shares in thousands) Shares Weighted- average Aggregate Outstanding at December 31, 2014: 25,134 $ 6.62 $ 1,425,339 Granted 527 47.37 Exercised (12,027 ) 1.97 Forfeited/Cancelled (249 ) 18.65 Outstanding at September 30, 2015: 13,385 $ 12.19 $ 276,067 Exercisable at September 30, 2015 8,258 $ 5.48 $ 214,083 Vested and expected to vest at September 30, 2015 13,127 $ 11.94 $ 273,232 At September 30, 2015 , there was $54.6 million of unearned stock-based compensation expense related to unvested options, which is expected to be amortized over a weighted average period of 2.31 years . Restricted stock units A summary of the Company’s RSU activity is as follows: (shares in thousands) Shares Weighted- average grant date fair value Non-vested shares at December 31, 2014 4,307 $ 21.98 Granted 1,525 52.93 Vested (1,372 ) 16.53 Forfeited (52 ) 69.51 Non-vested shares at September 30, 2015 4,408 $ 33.82 In June 2014, the Company granted an award of 4.5 million RSUs to the Chief Executive Officer (CEO RSUs), which included 1.5 million RSUs that vested immediately upon grant and 3.0 million RSUs that were subject to both a market-based condition and a service condition. In January 2015, the market-based condition was achieved and the Company recorded stock-based compensation expense of $4.3 million and $26.1 million during the three and nine months ended September 30, 2015 . At September 30, 2015 , there was $107.3 million of unearned stock-based compensation related to RSUs (including $10.2 million related to the CEO RSUs), which is expected to be amortized over a weighted average period of 2.51 years . Employee stock purchase plan During the nine months ended September 30, 2015 , employees purchased an aggregate of 436,924 shares under the ESPP at a price of $26.88 per share. During the three and nine months ended September 30, 2015 , the Company recorded $1.0 million and $3.0 million of stock-based compensation expense related to the ESPP. At September 30, 2015 , there was $1.7 million of unearned stock-based compensation related to the Company’s ESPP, which is expected to be recognized over 0.37 years. Stock-based compensation expense The Company measures compensation expense for all stock-based payment awards, including stock options, RSUs, and purchases under the Company's ESPP, based on the estimated fair values on the date of the grant. The fair value of stock options granted and purchases under the Company's ESPP is estimated using the Black-Scholes option pricing model. The fair value of RSUs is determined using the Company's stock price on the date of grant. There have been no significant changes in the Company’s valuation assumptions for measuring compensation expense from those disclosed in the footnotes to the audited financial statements contained in its 2014 Annual Report. Total stock-based compensation expense recognized was as follows: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Stock-based compensation expense: Cost of revenue $ 410 $ 233 $ 1,043 $ 555 Research and development 4,872 2,428 12,117 5,486 Sales and marketing 3,516 3,225 9,514 6,293 General and administrative 9,072 8,027 39,886 39,809 Total stock-based compensation expense 17,870 13,913 62,560 52,143 Total tax benefit recognized (7,323 ) (2,949 ) (22,867 ) (14,774 ) Decrease in net income $ 10,547 $ 10,964 $ 39,693 $ 37,369

Net income per share attributab

Net income per share attributable to common stockholders	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Net income per share attributable to common stockholders	Net income per share attributable to common stockholders Basic and diluted net income per common share is presented in conformity with the two-class method required for participating securities. The Company considers shares issued upon the early exercise of options subject to repurchase and non-vested restricted shares to be participating securities, because holders of such shares have a non-forfeitable right to dividends. Additionally, prior to the date of the Company's initial public offering (IPO) in June 2014, the Company considered its redeemable convertible preferred stock to be participating securities due to their non-cumulative dividend rights. Immediately after the completion of the Company's IPO, all outstanding shares of redeemable convertible preferred stock converted to Class B common stock. The rights of the holders of Class A and Class B common stock are identical, except with respect to voting and conversion. Each share of Class A common stock is entitled to one vote per share and each share of Class B common stock is entitled to ten votes per share. Each share of Class B common stock is convertible at any time at the option of the stockholder into one share of Class A common stock and has no expiration date. Each share of Class B common stock will convert automatically into one share of Class A common stock upon the date when the outstanding shares of Class B common stock represent less than 10% of the aggregate number of shares of common stock then outstanding. Class A common stock is not convertible into Class B common stock. Basic net income per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period. All participating securities are excluded from basic weighted average common shares outstanding. Diluted net income per share attributable to common stockholders is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding, including all potentially dilutive common shares. Undistributed earnings are allocated based on the contractual participation rights of common shares as if the earnings for the year have been distributed. As the liquidation and dividend rights are identical, the undistributed earnings are allocated on a proportionate basis. The computation of the diluted net income per share of Class A common stock assumes the conversion of Class B common stock. The following table presents the calculations of basic and diluted net income per share attributable to common stockholders: Three months ended Nine months ended (in thousands, except per share data) 2015 2014 2015 2014 Class A Class B Class A Class B Class A Class B Class A Class B Numerator: Allocation of net income $ 13,849 $ 4,950 $ 2,395 $ 12,225 $ 46,561 $ 24,021 $ 417 $ 5,411 Less: net income allocable to participating securities — — (6 ) (30 ) — — (73 ) (949 ) Net income attributable to common stockholders—basic 13,849 4,950 2,389 12,195 46,561 24,021 344 4,462 Add: net income allocable to dilutive participating securities — — 1 4 — — 10 130 Reallocation of net income as a result of conversion of Class B to Class A shares 4,950 12,195 — 24,021 4,462 — Reallocation of net income to Class B shares — 960 — — — 4,215 — — Net income attributable to common stockholders—diluted $ 18,799 $ 5,910 $ 14,585 $ 12,199 $ 70,582 $ 28,236 $ 4,816 $ 4,592 Denominator: Weighted-average common shares—basic 100,040 35,760 20,597 105,116 88,234 45,521 6,941 89,964 Conversion of Class B to Class A common stock outstanding 35,760 — 105,116 — 45,521 — 89,964 — Effect of potentially dilutive shares 10,255 10,159 19,473 19,317 13,446 13,366 18,673 18,621 Weighted-average common shares—diluted 146,055 45,919 145,186 124,433 147,201 58,887 115,578 108,585 Net income per share attributable to common stockholders: Basic $ 0.14 $ 0.14 $ 0.12 $ 0.12 $ 0.53 $ 0.53 $ 0.05 $ 0.05 Diluted $ 0.13 $ 0.13 $ 0.10 $ 0.10 $ 0.48 $ 0.48 $ 0.04 $ 0.04 The following potentially dilutive shares were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive: Three months ended Nine months ended (in thousands) 2015 2014 2015 2014 Redeemable convertible preferred stock — — — 20,237 Stock options, ESPP shares, and RSUs 2,373 366 1,993 2,871 Unvested restricted stock awards — 308 2 376 2,373 674 1,995 23,484

Income taxes

Income taxes	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The Company's tax provision for interim periods is determined using an estimate of its annual effective tax rate, adjusted for discrete items arising in that quarter. In each quarter, the Company updates its estimate of the annual effective tax rate, and if the estimated annual tax rate changes, the Company makes a cumulative adjustment in that quarter. Three months ended Nine months ended (dollars in thousands) September 30, September 30, September 30, September 30, Income tax expense (benefit) $ 8,474 $ (2,947 ) $ 22,975 $ 2,574 Effective tax rate 31.1 % (25.2 )% 24.6 % 30.6 % The higher income tax expense for the three and nine months ended September 30, 2015 , compared to the same periods in 2014 , was primarily due to higher pre-tax income. The income tax benefit for the third quarter of 2014 was primarily attributable to the impact of net losses that are not benefited, foreign withholding taxes, and non-deductible stock based compensation offset, in part, by research tax credits. The Company's provision for income taxes in each period has differed from the tax computed at U.S. federal statutory income tax rate due to state taxes, the effect of non-U.S. operations, deductible and non-deductible stock-based compensation expense, and adjustments to unrecognized tax benefits. The Company is currently under examination by the U.S. Internal Revenue Service for tax years 2012 and 2013 and the California Franchise Tax Board for tax years 2011 and 2012. At this time, the Company is not able to estimate the potential impact that these examinations may have on income tax expense. If the examinations are resolved unfavorably, they may have a material negative impact on the Company's results of operations. At September 30, 2015 and December 31, 2014 , the Company’s total amount of gross unrecognized tax benefits was $25.2 million and $16.6 million , respectively. If recognized, $23.6 million of the unrecognized tax benefits (net of federal benefit) at September 30, 2015 would be recorded as a reduction of the income tax provision in future periods. Management believes events that could occur in the next 12 months and cause a material change in unrecognized tax benefits include, but are not limited to, the completion of examinations by the U.S. or foreign taxing authorities, and the expiration of statute of limitations on the Company's tax returns. It is reasonably possible that the total amounts of unrecognized tax benefits will significantly increase within the next 12 months. However, the range of the reasonably possible change cannot be reliably estimated.

Related parties

Related parties	9 Months Ended
	Sep. 30, 2015
Related Party Transactions [Abstract]
Related parties	Related parties The Company has agreements for certain contract manufacturing and engineering services with a vendor affiliated with one of the Company's investors. In the nine months ended September 30, 2015 and 2014 , the Company made payments of $0.2 million and $11.9 million , respectively, for services rendered. The Company had no accounts payable associated with this vendor. The Company incurs costs for company-related chartered aircraft fees for the use of the CEO’s private plane. In the nine months ended September 30, 2015 and 2014 , the Company made payments of $0.9 million and $0.3 million , respectively. In 2013, the Company entered into a three -year agreement, which was amended in August 2015, with a company affiliated with the son of one of the members of the Company's Board of Directors to acquire certain naming rights to a kart racing facility. As consideration for these naming rights, the Company would pay a total of $0.5 million over the three year period. As of September 30, 2015 , the Company has made cumulative payments of $0.4 million and also provided 100 GoPro capture devices at no cost each year. In 2013, the Company loaned one of its executive officers $0.2 million pursuant to a demand payment loan that did not bear interest, which was fully repaid in March 2014. See Note 5, "Stockholders' Equity" for information regarding CEO RSUs and common stock contributed by the CEO back to the Company.

Commitments, contingencies and

Commitments, contingencies and guarantees	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments, contingencies and guarantees	Commitments, contingencies and guarantees The following table summarizes the Company’s contractual commitments as of September 30, 2015 : (in thousands) Total 1 year (remaining 3 months in 2015) 2-3 years (2016 and 2017) 4-5 years (2018 and 2019) More than 5 years (beyond 2019) Operating leases (1) $ 61,003 $ 4,121 $ 30,489 $ 18,979 $ 7,414 Sponsorship commitments (2) 11,277 2,694 8,571 12 — Other contractual commitments (3) 5,337 841 4,496 — — Capital equipment purchase commitments (4) 10,048 10,048 — — — Total contractual cash obligations $ 87,665 $ 17,704 $ 43,556 $ 18,991 $ 7,414 (1) The Company leases its facilities under long-term operating leases, which expire at various dates through 2023. (2) The Company sponsors sporting events, resorts and athletes as part of its marketing efforts. In many cases, the Company enters into multi-year agreements with event organizers, resorts and athletes. (3) The Company purchases software licenses and engages outside consultants to assist with upgrading or implementing its financial and IT systems, which require payments over multiple years. (4) The Company enters into contracts to acquire equipment for tooling and molds as part of its manufacturing operations. In addition, the Company incurs purchase commitments related to the manufacturing of its point-of-purchase (POP) displays by third parties. Rent expense was $3.3 million and $2.0 million for the three months ended September 30, 2015 and 2014 , respectively, and $8.2 million and $5.2 million for the nine months ended September 30, 2015 and 2014 , respectively. Legal proceedings From time to time, the Company is involved in legal proceedings in the ordinary course of business. The Company believes that the outcome of any existing litigation, either individually or in the aggregate, will not have a material impact on the results of operations, financial condition or cash flows of the Company. Indemnifications In the normal course of business, the Company enters into agreements that contain a variety of representations and warranties and provide for general indemnification. The Company’s exposure under these agreements is unknown because it involves claims that may be made against the Company in the future, but have not yet been made. As of September 30, 2015 , the Company has not paid any claims or been required to defend any action related to its indemnification obligations. However, the Company may record charges in the future as a result of these indemnification obligations. Product warranty The following table summarizes the warranty liability activity: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Beginning balances $ 8,719 $ 4,678 $ 6,405 $ 3,870 Charged to cost of revenue 6,515 2,778 18,335 6,978 Settlements of warranty claims (5,809 ) (2,073 ) (15,315 ) (5,465 ) Ending balances $ 9,425 $ 5,383 $ 9,425 $ 5,383 At September 30, 2015 , $9.1 million of the warranty liability was recorded as an element of accrued liabilities and $0.4 million was recorded as an element of other long-term liabilities. As of December 31, 2014, $6.0 million of the warranty liability was recorded as an element of accrued liabilities and $0.4 million was recorded as an element of other long-term liabilities.

Concentrations of risk and segm

Concentrations of risk and segment information	9 Months Ended
	Sep. 30, 2015
Risks and Uncertainties [Abstract]
Concentrations of risk and segment information	Concentrations of risk and segment information Segment information The Company operates as one operating segment as it only reports financial information on an aggregate and consolidated basis to its CEO, who is the Company’s chief operating decision maker. Customer concentration Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of trade receivables. The Company believes that credit risk in its accounts receivable is mitigated by the Company’s credit evaluation process, relatively short collection terms and dispersion of its customer base. The Company generally does not require collateral and losses on trade receivables have historically been within management’s expectations. The Company had the following customers who represented 10% or more of its net accounts receivable balance: September 30, December 31, Customer A 17% 14% Customer B 16% 17% Customer C 12% * Customer D 10% * Customer E * 11% * Less than 10% of total accounts receivable for the period indicated The Company sold accounts receivables, without recourse, of $55.1 million and $52.4 million in the three months ended September 30, 2015 and 2014 , respectively, and $140.9 million and $121.6 million in the nine months ended September 30, 2015 and 2014 , respectively, to a third-party banking institution. Factoring fees of $0.5 million and $0.5 million in the three months ended September 30, 2015 and 2014 , respectively and $1.2 million and $1.1 million in the nine months ended September 30, 2015 and 2014 , respectively, were included in other expense, net. Customers with revenue equal to or greater than 10% of the Company's total revenue were as follows: Three months ended Nine months ended September 30, September 30, September 30, September 30, Customer A 14% 27% 14% 19% Customer B 11% * * * * Less than 10% of total revenue for the period indicated Supplier concentration The Company relies on third parties for the supply and manufacture of its capture devices, some of which are sole-source suppliers. The Company believes that outsourcing manufacturing enables greater scale and flexibility. As demand and product lines change, the Company periodically evaluates the need and advisability of adding manufacturers to support its operations. In instances where a supply and manufacture agreement does not exist or suppliers fail to perform their obligations, the Company may be unable to find alternative suppliers or satisfactorily deliver its products to its customers on time, if at all. The Company also relies on third parties with whom it outsources supply chain activities related to inventory warehousing, order fulfillment, distribution and other direct sales logistics . Geographic and other information Revenue by geographic region, based on ship-to destinations, was as follows: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Americas $ 190,839 $ 204,893 $ 583,282 $ 482,769 Europe, Middle East and Africa (EMEA) 156,639 56,068 432,904 207,285 Asia and Pacific area countries (APAC) 52,862 19,010 167,182 70,238 $ 400,340 $ 279,971 $ 1,183,368 $ 760,292 Revenue in the United States, which is included in the Americas geographic region, was $169.2 million and $185.6 million for the three months ended September 30, 2015 and 2014 , respectively, and $513.6 million and $428.9 million for the nine months ended September 30, 2015 and 2014 , respectively. During the three months ended December 31, 2014 , the Company reclassified four countries it had previously included in the APAC geographical region to be included in the EMEA geographical region. This caused $13.4 million of revenue to be reclassified from the APAC region to the EMEA region for the nine months ended September 30, 2014 . The Company does not disclose revenue by product category as it does not track sales incentives and other revenue adjustments by product category to report such data. As of September 30, 2015 and December 31, 2014 , long-lived assets, which represent gross property and equipment, located outside the United States, primarily in China, were $46.7 million and $25.4 million , respectively.

Summary of significant accoun16

Summary of significant accounting policies (Policies)	9 Months Ended
	Sep. 30, 2015
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (GAAP) and in accordance with the interim period reporting requirements of Form 10-Q. The unaudited condensed consolidated financial statements reflect all adjustments (consisting only of normal recurring adjustments) that management believes are necessary for the fair presentation of the Company's financial condition, results of operations, and cash flows for the periods presented, but are not necessarily indicative of the results expected for the full fiscal year or any other future period. The condensed consolidated balance sheet at December 31, 2014 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP. This quarterly report should be read in conjunction with the Company's Annual Report on Form 10-K for the year ended December 31, 2014 (2014 Annual Report). There have been no significant changes in the Company’s accounting policies from those disclosed in the footnotes to the audited financial statements contained in its 2014 Annual Report.
Principles of consolidation	Principles of consolidation The condensed consolidated financial statements include all the accounts of the Company and its wholly-owned subsidiaries. Unless otherwise specified, references to the Company are references to GoPro, Inc. and its consolidated subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.
Use of estimates	Use of estimates The preparation of financial statements in accordance with GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the Company’s condensed consolidated financial statements and accompanying notes. The Company regularly evaluates estimates and assumptions in several areas, including those related to: revenue recognition (including sales returns, web-based sale deliveries at period-end, implied post contract support, and marketing allowances), collectability of accounts receivable, stock-based compensation, inventory valuation, product warranty liabilities, the valuation and useful lives of intangible assets and property and equipment, goodwill, and income taxes. The Company bases its estimates and assumptions on historical experience and on various other factors that it believes to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ materially from management's estimates. To the extent there are material differences between the estimates and the actual results, future results of operations could be affected.
Comprehensive income	Comprehensive income For all periods presented, comprehensive income approximated net income. Therefore, the condensed consolidated statements of comprehensive income have been omitted from the condensed consolidated financial statements.
Prior period reclassifications	Prior period reclassifications Reclassifications of certain prior period amounts in the condensed consolidated financial statements have been made to conform to the current period presentation.
Recent accounting pronouncements	Recent accounting pronouncements In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2014-09 (ASU 2014-09), Revenue from Contracts with Customers, which amends the existing accounting standards for revenue recognition. ASU 2014-09 is based on principles that govern the recognition of revenue at an amount to which an entity expects to be entitled when products and services are transferred to customers. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date (ASU 2015-14), which defers the effective date by one year while providing the option to adopt the standard on the original effective date. Accordingly, the Company may adopt the standard either in its first quarter of 2017 or its first quarter of 2018 and it can be adopted either retrospectively to each prior reporting period presented or as a cumulative effect adjustment as of the date of adoption. The Company is currently evaluating the timing and the impact the adoption of ASU 2014-09 will have on the Company's consolidated financial statements. In September 2015, the FASB issued ASU 2015-16, Business Combinations (Topic 805), which amends the existing guidance for business combinations. Under the updated guidance, the acquirer in a business combination is required to recognize adjustments to provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined. This new standard will become effective for the Company on January 1, 2016, and will be applied prospectively to adjustments to provisional amounts that occur after the effective date of this update. The Company is currently evaluating the impact the adoption of ASU 2015-16 will have on the Company's consolidated financial statements.

Condensed consolidated financ17

Condensed consolidated financial statement details (Tables)	9 Months Ended
	Sep. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Inventory	Inventory consisted of the following: (in thousands) September 30, December 31, Components $ 14,478 $ 4,324 Finished goods 275,043 148,702 Total inventory $ 289,521 $ 153,026
Property, Plant and Equipment	Property and equipment, net consisted of the following: (in thousands) Useful life (in years) September 30, December 31, Leasehold improvements 3–7 $ 24,050 $ 22,787 Computers, software, equipment and furniture 2–4 42,936 24,636 Tooling 1–2 19,876 16,159 Construction in progress 19,507 3,944 Tradeshow equipment and other 2-5 4,016 3,830 Total 110,385 71,356 Less: Accumulated depreciation and amortization (42,741 ) (29,800) Property and equipment, net $ 67,644 $ 41,556
Schedule of Business Acquisitions	The following table summarizes the preliminary allocation of the fair values of the assets acquired and liabilities assumed, and the related useful lives, where applicable: (in thousands) Estimated Fair value Purchased technology 4 - 6 years $ 25,676 In-process research and development (IPR&D) 6,600 Net liabilities assumed (353 ) Deferred income tax liabilities (4,676 ) Net assets acquired 27,247 Goodwill 43,000 Total fair value consideration $ 70,247
Schedule of Finite-Lived Intangible Assets	The following table summarizes the Company's acquired intangible assets: September 30, 2015 December 31, 2014 (in thousands) Gross carrying amount Accumulated amortization Net carrying value Net carrying value Purchased technology and other amortizable assets $ 32,951 $ (7,019 ) $ 25,932 $ 2,922 IPR&D and other non-amortizable assets 6,615 — 6,615 15 Total intangible assets $ 39,566 $ (7,019 ) $ 32,547 $ 2,937
Schedule of Future Amortization	Estimated amortization expense for future periods as of September 30, 2015 , is as follows: (in thousands) Total Year ending December 31, Remainder of 2015 $ 1,521 2016 5,956 2017 5,172 2018 4,779 2019 4,269 Thereafter 4,235 $ 25,932

Fair value measurements (Tables

Fair value measurements (Tables)	9 Months Ended
	Sep. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value, Assets Measured on Recurring Basis	The Company’s assets that are measured at fair value on a recurring basis, by level, within the fair value hierarchy are summarized as follows: September 30, 2015 December 31, 2014 (in thousands) Level 1 Level 2 Total Level 1 Level 2 Total Cash equivalents (1) : Money market funds $ 12,173 $ — $ 12,173 $ 80,968 $ — $ 80,968 Corporate debt securities — 100 100 — 2,000 2,000 Total cash equivalents $ 12,173 $ 100 $ 12,273 $ 80,968 $ 2,000 $ 82,968 Marketable securities: U.S. treasury securities $ 3,014 $ — $ 3,014 $ 1,994 $ — $ 1,994 U.S. agency securities — 19,565 19,565 — 7,020 7,020 Commercial paper — 997 997 — 2,497 2,497 Corporate debt securities — 197,554 197,554 — — — Municipal securities — 12,003 12,003 — 90,816 90,816 Total marketable securities $ 3,014 $ 230,119 $ 233,133 $ 1,994 $ 100,333 $ 102,327 (1) Included in “cash and cash equivalents” in the accompanying condensed consolidated balance sheets as of September 30, 2015 and December 31, 2014, in addition to cash of $267.7 million and $237.0 million , respectively .

Stockholders' equity (Tables)

Stockholders' equity (Tables)	9 Months Ended
	Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share-based Compensation, Stock Options, Activity	A summary of the Company’s stock option activity and related information is as follows: Options outstanding (shares in thousands) Shares Weighted- average Aggregate Outstanding at December 31, 2014: 25,134 $ 6.62 $ 1,425,339 Granted 527 47.37 Exercised (12,027 ) 1.97 Forfeited/Cancelled (249 ) 18.65 Outstanding at September 30, 2015: 13,385 $ 12.19 $ 276,067 Exercisable at September 30, 2015 8,258 $ 5.48 $ 214,083 Vested and expected to vest at September 30, 2015 13,127 $ 11.94 $ 273,232
Schedule of Share-based Compensation, Restricted Stock Units Award Activity	A summary of the Company’s RSU activity is as follows: (shares in thousands) Shares Weighted- average grant date fair value Non-vested shares at December 31, 2014 4,307 $ 21.98 Granted 1,525 52.93 Vested (1,372 ) 16.53 Forfeited (52 ) 69.51 Non-vested shares at September 30, 2015 4,408 $ 33.82
Allocation of Stock-based Compensation Expense	Total stock-based compensation expense recognized was as follows: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Stock-based compensation expense: Cost of revenue $ 410 $ 233 $ 1,043 $ 555 Research and development 4,872 2,428 12,117 5,486 Sales and marketing 3,516 3,225 9,514 6,293 General and administrative 9,072 8,027 39,886 39,809 Total stock-based compensation expense 17,870 13,913 62,560 52,143 Total tax benefit recognized (7,323 ) (2,949 ) (22,867 ) (14,774 ) Decrease in net income $ 10,547 $ 10,964 $ 39,693 $ 37,369

Net income per share attribut20

Net income per share attributable to common stockholders (Tables)	9 Months Ended
	Sep. 30, 2015
Earnings Per Share [Abstract]
Schedule of Net Income per Share, Basic and Diluted	The following table presents the calculations of basic and diluted net income per share attributable to common stockholders: Three months ended Nine months ended (in thousands, except per share data) 2015 2014 2015 2014 Class A Class B Class A Class B Class A Class B Class A Class B Numerator: Allocation of net income $ 13,849 $ 4,950 $ 2,395 $ 12,225 $ 46,561 $ 24,021 $ 417 $ 5,411 Less: net income allocable to participating securities — — (6 ) (30 ) — — (73 ) (949 ) Net income attributable to common stockholders—basic 13,849 4,950 2,389 12,195 46,561 24,021 344 4,462 Add: net income allocable to dilutive participating securities — — 1 4 — — 10 130 Reallocation of net income as a result of conversion of Class B to Class A shares 4,950 12,195 — 24,021 4,462 — Reallocation of net income to Class B shares — 960 — — — 4,215 — — Net income attributable to common stockholders—diluted $ 18,799 $ 5,910 $ 14,585 $ 12,199 $ 70,582 $ 28,236 $ 4,816 $ 4,592 Denominator: Weighted-average common shares—basic 100,040 35,760 20,597 105,116 88,234 45,521 6,941 89,964 Conversion of Class B to Class A common stock outstanding 35,760 — 105,116 — 45,521 — 89,964 — Effect of potentially dilutive shares 10,255 10,159 19,473 19,317 13,446 13,366 18,673 18,621 Weighted-average common shares—diluted 146,055 45,919 145,186 124,433 147,201 58,887 115,578 108,585 Net income per share attributable to common stockholders: Basic $ 0.14 $ 0.14 $ 0.12 $ 0.12 $ 0.53 $ 0.53 $ 0.05 $ 0.05 Diluted $ 0.13 $ 0.13 $ 0.10 $ 0.10 $ 0.48 $ 0.48 $ 0.04 $ 0.04
Schedule of Antidilutive Securities Excluded from Computation of Net Income per Share	The following potentially dilutive shares were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive: Three months ended Nine months ended (in thousands) 2015 2014 2015 2014 Redeemable convertible preferred stock — — — 20,237 Stock options, ESPP shares, and RSUs 2,373 366 1,993 2,871 Unvested restricted stock awards — 308 2 376 2,373 674 1,995 23,484

Income taxes (Tables)

Income taxes (Tables)	9 Months Ended
	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax Expense (Benefit)	Three months ended Nine months ended (dollars in thousands) September 30, September 30, September 30, September 30, Income tax expense (benefit) $ 8,474 $ (2,947 ) $ 22,975 $ 2,574 Effective tax rate 31.1 % (25.2 )% 24.6 % 30.6 %

Commitments, contingencies an22

Commitments, contingencies and guarantees (Tables)	9 Months Ended
	Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Schedule of the Company's Contractual Commitments	The following table summarizes the Company’s contractual commitments as of September 30, 2015 : (in thousands) Total 1 year (remaining 3 months in 2015) 2-3 years (2016 and 2017) 4-5 years (2018 and 2019) More than 5 years (beyond 2019) Operating leases (1) $ 61,003 $ 4,121 $ 30,489 $ 18,979 $ 7,414 Sponsorship commitments (2) 11,277 2,694 8,571 12 — Other contractual commitments (3) 5,337 841 4,496 — — Capital equipment purchase commitments (4) 10,048 10,048 — — — Total contractual cash obligations $ 87,665 $ 17,704 $ 43,556 $ 18,991 $ 7,414 (1) The Company leases its facilities under long-term operating leases, which expire at various dates through 2023. (2) The Company sponsors sporting events, resorts and athletes as part of its marketing efforts. In many cases, the Company enters into multi-year agreements with event organizers, resorts and athletes. (3) The Company purchases software licenses and engages outside consultants to assist with upgrading or implementing its financial and IT systems, which require payments over multiple years. (4) The Company enters into contracts to acquire equipment for tooling and molds as part of its manufacturing operations. In addition, the Company incurs purchase commitments related to the manufacturing of its point-of-purchase (POP) displays by third parties.
Schedule of Product Warranty Liability Activity	The following table summarizes the warranty liability activity: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Beginning balances $ 8,719 $ 4,678 $ 6,405 $ 3,870 Charged to cost of revenue 6,515 2,778 18,335 6,978 Settlements of warranty claims (5,809 ) (2,073 ) (15,315 ) (5,465 ) Ending balances $ 9,425 $ 5,383 $ 9,425 $ 5,383

Concentrations of risk and se23

Concentrations of risk and segment information (Tables)	9 Months Ended
	Sep. 30, 2015
Concentration Risk [Line Items]
Schedule of Revenue by Geographic Region	Revenue by geographic region, based on ship-to destinations, was as follows: Three months ended Nine months ended (in thousands) September 30, September 30, September 30, September 30, Americas $ 190,839 $ 204,893 $ 583,282 $ 482,769 Europe, Middle East and Africa (EMEA) 156,639 56,068 432,904 207,285 Asia and Pacific area countries (APAC) 52,862 19,010 167,182 70,238 $ 400,340 $ 279,971 $ 1,183,368 $ 760,292
Accounts Receivable [Member]
Concentration Risk [Line Items]
Schedules of Customer Concentration by Risk Factor	The Company had the following customers who represented 10% or more of its net accounts receivable balance: September 30, December 31, Customer A 17% 14% Customer B 16% 17% Customer C 12% * Customer D 10% * Customer E * 11% * Less than 10% of total accounts receivable for the period indicated
Sales Revenue [Member]
Concentration Risk [Line Items]
Schedules of Customer Concentration by Risk Factor	Customers with revenue equal to or greater than 10% of the Company's total revenue were as follows: Three months ended Nine months ended September 30, September 30, September 30, September 30, Customer A 14% 27% 14% 19% Customer B 11% * * * * Less than 10% of total revenue for the period indicated

Condensed consolidated financ24

Condensed consolidated financial statement details - Inventory (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Components	$ 14,478	$ 4,324
Finished goods	275,043	148,702
Total inventory	$ 289,521	$ 153,026

Condensed consolidated financ25

Condensed consolidated financial statement details - Property and Equipment, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total	$ 110,385	$ 71,356
Less: Accumulated depreciation and amortization	(42,741)	(29,800)
Property and equipment, net	67,644	41,556
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Total	24,050	22,787
Computers, Software, Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Total	42,936	24,636
Tooling [Member]
Property, Plant and Equipment [Line Items]
Total	19,876	16,159
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Total	19,507	3,944
Tradeshow Equipment and Other [Member]
Property, Plant and Equipment [Line Items]
Total	$ 4,016	$ 3,830
Minimum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	3 years
Minimum [Member] | Computers, Software, Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	2 years
Minimum [Member] | Tooling [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	1 year
Minimum [Member] | Tradeshow Equipment and Other [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	2 years
Maximum [Member] | Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	7 years
Maximum [Member] | Computers, Software, Equipment and Furniture [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	4 years
Maximum [Member] | Tooling [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	2 years
Maximum [Member] | Tradeshow Equipment and Other [Member]
Property, Plant and Equipment [Line Items]
Useful life (in years)	5 years

Condensed consolidated financ26

Condensed consolidated financial statement details - Business Acquisition (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 57,095	$ 14,095
Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred	70,200
Net liabilities assumed	(353)
Deferred income tax liabilities	(4,676)
Net assets acquired	27,247
Goodwill	43,000
Total fair value consideration	70,247
Developed Technology Rights [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Purchased technology	$ 25,676
Developed Technology Rights [Member] | Maximum [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Estimated useful life (in years)	6 years
Developed Technology Rights [Member] | Minimum [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
Estimated useful life (in years)	4 years
In Process Research and Development [Member] | Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]
In-process research and development (IPR&D)	$ 6,600

Condensed consolidated financ27

Condensed consolidated financial statement details - Acquired Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Finite-Lived Intangible Assets, Net [Abstract]
Net carrying value	$ 25,932
Intangible assets, net	32,547		$ 2,937
Amortization of intangible assets	2,700	$ 800
Goodwill	57,095		14,095
Series of Individually Immaterial Business Acquisitions [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	32,951
Accumulated amortization	(7,019)
Net carrying value	25,932		2,922
Indefinite lived intangible assets	6,615		15
Intangible assets, gross	39,566
Intangible assets, net	32,547		$ 2,937
Goodwill	$ 43,000

Condensed consolidated financ28

Condensed consolidated financial statement details - Future Amortization (Details) $ in Thousands	Sep. 30, 2015USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Remainder of 2015	$ 1,521
2,016	5,956
2,017	5,172
2,018	4,779
2,019	4,269
Thereafter	4,235
Net carrying value	$ 25,932

Condensed consolidated financ29

Condensed consolidated financial statement details - Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Warranty liability	$ 9,061	$ 6,000
Total accrued liabilities	$ 166,116	$ 115,775

Fair value measurements (Detail

Fair value measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	$ 233,133	$ 102,327
Cash and cash equivalents	267,700	237,000
Marketable securities with contractual maturity of one year or less	134,600
Marketable securities with contractual maturity of one to two years	98,500
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	12,273	82,968
Marketable securities	233,133	102,327
Fair Value, Measurements, Recurring [Member] | Municipal Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	12,003	90,816
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	3,014	1,994
Fair Value, Measurements, Recurring [Member] | US Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	19,565	7,020
Fair Value, Measurements, Recurring [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	997	2,497
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	197,554	0
Fair Value, Measurements, Recurring [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	12,173	80,968
Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	100	2,000
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	12,173	80,968
Marketable securities	3,014	1,994
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Municipal Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	3,014	1,994
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | US Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	12,173	80,968
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	100	2,000
Marketable securities	230,119	100,333
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Municipal Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	12,003	90,816
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Treasury Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | US Agency Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	19,565	7,020
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	997	2,497
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	197,554	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 100	$ 2,000

Stockholders' equity - Narrativ

Stockholders' equity - Narrative (Details) $ / shares in Units, $ in Thousands	1 Months Ended			3 Months Ended			9 Months Ended
	May. 31, 2015shares	Apr. 30, 2015shares	Jun. 30, 2014shares	Sep. 30, 2015USD ($)	Jun. 30, 2015shares	Sep. 30, 2014USD ($)	Sep. 30, 2015USD ($)plan$ / sharesshares	Sep. 30, 2014USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchase Program, Authorized Amount				$ 300,000			$ 300,000
Number of stock-based employee compensation plans | plan							3
Stock-based compensation				17,870		$ 13,913	$ 62,560	$ 52,143
ESPP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price of common stock as percentage of fair value of Company common stock (percent)							85.00%
Unearned stock-based compensation costs				1,700			$ 1,700
Unearned stock-based compensation, expected recognition period							4 months 13 days
Aggregate shares purchased by employees | shares							436,924
Employee Stock Ownership Plan (ESOP), Weighted Average Purchase Price of Shares Purchased | $ / shares							$ 26.88
Stock-based compensation				1,000			$ 3,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation costs				54,600			$ 54,600
Unearned stock-based compensation, expected recognition period							2 years 3 months 22 days
RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation costs				107,300			$ 107,300
Unearned stock-based compensation, expected recognition period							2 years 6 months 4 days
Shares granted | shares							1,525,000
RSUs [Member] | Chief Executive Officer (CEO) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unearned stock-based compensation costs				10,200			$ 10,200
Shares granted | shares			4,500,000
RSUs [Member] | Chief Executive Officer (CEO) [Member] | Vested Immediately [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares			1,500,000
RSUs [Member] | Chief Executive Officer (CEO) [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted | shares			3,000,000
Stock-based compensation expense				$ 4,300			$ 26,100
2014 Equity Incentive Plans [Member] | Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period							10 years
Award vesting period							4 years
2014 Equity Incentive Plans [Member] | RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period							4 years
Common Class B [Member] | Chief Executive Officer (CEO) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares contributed to company without consideration | shares	4,678,180	180,000			4,858,180

Stockholders' equity - Stock Op

Stockholders' equity - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Shares
Outstanding at beginning of period (shares)	25,134
Granted (shares)	527
Exercised (shares)	(12,027)
Forfeited/Cancelled (shares)	(249)
Outstanding at end of period (shares)	13,385
Weighted- average exercise price
Outstanding at beginning of period (in dollars per share)	$ 6.62
Granted (in dollars per share)	47.37
Exercised (in dollars per share)	1.97
Forfeited/Cancelled (in dollars per share)	18.65
Outstanding at end of period (in dollars per share)	$ 12.19
Aggregate intrinsic value	$ 276,067	$ 1,425,339
Exercisable (shares)	8,258
Exercisable - Weighted average exercise price (in dollars per share)	$ 5.48
Exercisable - Aggregate intrinsic value	$ 214,083
Vested and expected to vest (shares)	13,127
Vested and expected to vest - Weighted average exercise price (in dollars per share)	$ 11.94
Vested and expected to vest - Aggregate intrinsic value	$ 273,232

Stockholders' equity - Restrict

Stockholders' equity - Restricted Stock Units Activity (Details) - RSUs [Member] shares in Thousands	9 Months Ended
	Sep. 30, 2015$ / sharesshares
Shares
Non-vested shares at beginning of period (shares)	4,307
Granted (shares)	1,525
Vested (shares)	(1,372)
Forfeited (shares)	(52)
Non-vested shares at end of period (shares)	4,408
Weighted- average grant date fair value
Non-vested shares at beginning of period (in dollars per share) | $ / shares	$ 21.98
Granted (in dollars per share) | $ / shares	52.93
Vested (in dollars per share) | $ / shares	16.53
Forfeited (in dollars per share) | $ / shares	69.51
Non-vested shares at end of period (in dollars per share) | $ / shares	$ 33.82

Stockholders' equity - Allocati

Stockholders' equity - Allocation of Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 17,870	$ 13,913	$ 62,560	$ 52,143
Total tax benefit recognized	(7,323)	(2,949)	(22,867)	(14,774)
Decrease in net income	10,547	10,964	39,693	37,369
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	410	233	1,043	555
Research and Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	4,872	2,428	12,117	5,486
Selling and Marketing [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	3,516	3,225	9,514	6,293
General and Administrative [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 9,072	$ 8,027	$ 39,886	$ 39,809

Net income per share attribut35

Net income per share attributable to common stockholders - Additional Information (Details)	9 Months Ended
	Sep. 30, 2015vote
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding shares less than 10% of aggregate shares outstanding, conversion ratio	1
Common Class A [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock, number of voting rights	1
Common Class B [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock, number of voting rights	10

Net income per share attribut36

Net income per share attributable to common stockholders - Basic and Diluted Net Income per Share Attributable to Common Stockholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 18,799	$ 14,620	$ 70,582	$ 5,828
Less: net income allocable to participating securities	0	(36)	0	(1,022)
Numerator:
Net income attributable to common stockholders—basic	18,799	14,584	70,582	4,806
Add: net income allocable to dilutive participating securities	0	1	0	10
Net income attributable to common stockholders—diluted	$ 18,799	$ 14,585	$ 70,582	$ 4,816
Denominator:
Weighted-average common shares—basic (in shares)	135,800	125,713	133,755	96,905
Weighted-average common shares—diluted (in shares)	146,055	145,186	147,201	115,578
Net income per share attributable to common stockholders - Basic (in dollars per share)	$ 0.14	$ 0.12	$ 0.53	$ 0.05
Net income per share attributable to common stockholders - Diluted (in dollars per share)	$ 0.13	$ 0.10	$ 0.48	$ 0.04
Common Class A [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 13,849	$ 2,395	$ 46,561	$ 417
Less: net income allocable to participating securities	0	(6)	0	(73)
Numerator:
Net income attributable to common stockholders—basic	13,849	2,389	46,561	344
Add: net income allocable to dilutive participating securities	0	1	0	10
Reallocation of net income	4,950	12,195	24,021	4,462
Net income attributable to common stockholders—diluted	$ 18,799	$ 14,585	$ 70,582	$ 4,816
Denominator:
Weighted-average common shares—basic (in shares)	100,040	20,597	88,234	6,941
Conversion of Class B to Class A common stock outstanding (in shares)	35,760	105,116	45,521	89,964
Effect of potentially dilutive stock options, ESPP shares and RSUs (in shares)	10,255	19,473	13,446	18,673
Weighted-average common shares—diluted (in shares)	146,055	145,186	147,201	115,578
Net income per share attributable to common stockholders - Basic (in dollars per share)	$ 0.14	$ 0.12	$ 0.53	$ 0.05
Net income per share attributable to common stockholders - Diluted (in dollars per share)	$ 0.13	$ 0.10	$ 0.48	$ 0.04
Common Class B [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income	$ 4,950	$ 12,225	$ 24,021	$ 5,411
Less: net income allocable to participating securities	0	(30)	0	(949)
Numerator:
Net income attributable to common stockholders—basic	4,950	12,195	24,021	4,462
Add: net income allocable to dilutive participating securities	$ 0	4	$ 0	130
Reallocation of net income		0		0
Net income attributable to common stockholders—diluted	$ 5,910	$ 12,199	$ 28,236	$ 4,592
Denominator:
Weighted-average common shares—basic (in shares)	35,760	105,116	45,521	89,964
Conversion of Class B to Class A common stock outstanding (in shares)	0	0	0	0
Effect of potentially dilutive stock options, ESPP shares and RSUs (in shares)	10,159	19,317	13,366	18,621
Weighted-average common shares—diluted (in shares)	45,919	124,433	58,887	108,585
Net income per share attributable to common stockholders - Basic (in dollars per share)	$ 0.14	$ 0.12	$ 0.53	$ 0.05
Net income per share attributable to common stockholders - Diluted (in dollars per share)	$ 0.13	$ 0.10	$ 0.48	$ 0.04
Class B [Member]
Numerator:
Reallocation of net income	$ 960		$ 4,215

Net income per share attribut37

Net income per share attributable to common stockholders - Antidilutive Securities Excluded from Computation of Net Income per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	2,373	674	1,995	23,484
Series A Redeemable Convertible Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	0	0	0	20,237
Stock Options and RSUs [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	2,373	366	1,993	2,871
Unvested Stock Awards and Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from the calculation of diluted shares outstanding (shares)	0	308	2	376

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ 8,474	$ (2,947)	$ 22,975	$ 2,574
Effective tax rate (percent)	31.10%	(25.20%)	24.60%	30.60%
Gross unrecognized tax benefits	$ 25,200		$ 25,200		$ 16,600
Unrecognized tax benefits that would be recorded as reduction in income tax provision, if recognized	$ 23,600		$ 23,600

Related parties (Details)

Related parties (Details)	9 Months Ended		12 Months Ended
	Sep. 30, 2015USD ($)Device	Sep. 30, 2014USD ($)	Dec. 31, 2013	Jun. 30, 2013USD ($)
Company Affiliated with Investors [Member] | Related Party Transaction, Contract Manufacturing Agreement [Member]
Related Party Transaction [Line Items]
Payments made to affiliated vendor for services rendered	$ 200,000	$ 11,900,000
Chief Executive Officer (CEO) [Member] | Related Party Transaction, Chartered Aircraft Expenses [Member]
Related Party Transaction [Line Items]
Payments to related parties	900,000	$ 314,000
Immediate Family Member of Member of the Board [Member]
Related Party Transaction [Line Items]
Naming rights agreement, period			3 years
Payments to be made to related party for naming rights	500,000
Aggregate payments to related party for naming rights	$ 400,000
Number of devices provided to related party at no cost | Device	100
Executive Officer [Member] | Related Party Transaction, Demand Payment Loan [Member]
Related Party Transaction [Line Items]
Loan amount to executive officer pursuant to demand payment loan				$ 200,000

Commitments, contingencies an40

Commitments, contingencies and guarantees - Schedule of Company's Contractual Commitments (Details) $ in Thousands	Sep. 30, 2015USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating leases	$ 61,003
Operating leases: 1 year (remaining 9 months in 2015)	4,121
Operating leases: 2-3 years (2016 and 2017)	30,489
Operating leases: 4-5 years (2018 and 2019)	18,979
Operating leases: More than 5 years (beyond 2019)	7,414
Sponsorship commitments	11,277
Sponsorship commitments: 1 year (remaining 9 months in 2015)	2,694
Sponsorship commitments: 2-3 years (2016 and 2017)	8,571
Sponsorship commitments: 4-5 years (2018 and 2019)	12
Sponsorship commitments: More than 5 years (beyond 2019)	0
Other contractual commitments	5,337
Other contractual commitments: 1 year (remaining 9 months in 2015)	841
Other contractual commitments: 2-3 years (2016 and 2017)	4,496
Other contractual commitments: 4-5 years (2018 and 2019)	0
Other contractual commitments: More than 5 years (beyond 2019)	0
Capital equipment purchase commitments	10,048
Capital equipment purchase commitments: 1 year (remaining 9 months in 2015)	10,048
Capital equipment purchase commitments: 2-3 years (2016 and 2017)	0
Capital equipment purchase commitments: 4-5 years (2018 and 2019)	0
Capital equipment purchase commitments: More than 5 years (beyond 2019)	0
Total contractual cash obligations	87,665
Total contractual cash obligations: 1 year (remaining 9 months in 2015)	17,704
Total contractual cash obligations: 2-3 years (2016 and 2017)	43,556
Total contractual cash obligations: 4-5 years (2018 and 2019)	18,991
Total contractual cash obligations: More than 5 years (beyond 2019)	$ 7,414

Commitments, contingencies an41

Commitments, contingencies and guarantees - Schedule of Product Warranty Liability Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]
Beginning balances	$ 8,719	$ 4,678	$ 6,405	$ 3,870
Charged to cost of revenue	6,515	2,778	18,335	6,978
Settlements of warranty claims	(5,809)	(2,073)	(15,315)	(5,465)
Ending balances	$ 9,425	$ 5,383	$ 9,425	$ 5,383

Commitments, contingencies an42

Commitments, contingencies and guarantees - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Rent expense	$ 3,300	$ 2,000	$ 8,200	$ 5,200
Current product warranty accrual	9,061		9,061		$ 6,000
Noncurrent product warranty accrual	$ 400		$ 400		$ 400

Concentrations of risk and se43

Concentrations of risk and segment information - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Revenue, Major Customer [Line Items]
Accounts receivable sold during the period	$ 55,100	$ 52,400	$ 140,900	$ 121,600
Factoring fees	500	500	1,200	1,100
Revenue	400,340	279,971	1,183,368	760,292
United States [Member]
Revenue, Major Customer [Line Items]
Revenue	169,200	$ 185,600	513,600	$ 428,900
Formerly APAC to EMEA Region [Member]
Revenue, Major Customer [Line Items]
Revenue			13,400
Outside the United States [Member]
Revenue, Major Customer [Line Items]
Long-lived assets	$ 46,700		$ 46,700		$ 25,400

Concentrations of risk and se44

Concentrations of risk and segment information - Schedule of Customer Concentration by Risk Factor (Details) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Accounts Receivable [Member] | A (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			17.00%		14.00%
Accounts Receivable [Member] | Customer B (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			16.00%		17.00%
Accounts Receivable [Member] | Customer C (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			12.00%
Accounts Receivable [Member] | Customer D [Member]
Concentration Risk [Line Items]
Concentration risk, percentage			10.00%
Accounts Receivable [Member] | Customer E (Distributor) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage					11.00%
Sales Revenue [Member] | A (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%	27.00%	14.00%	19.00%
Sales Revenue [Member] | Customer B (Retailer) [Member]
Concentration Risk [Line Items]
Concentration risk, percentage	11.00%

Concentrations of risk and se45

Concentrations of risk and segment information - Schedule of Revenue by Geographic Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue, Major Customer [Line Items]
Revenue	$ 400,340	$ 279,971	$ 1,183,368	$ 760,292
Americas [Member]
Revenue, Major Customer [Line Items]
Revenue	190,839	204,893	583,282	482,769
Europe, Middle East and Africa [Member]
Revenue, Major Customer [Line Items]
Revenue	156,639	56,068	432,904	207,285
Asia and Pacific Area Countries [Member]
Revenue, Major Customer [Line Items]
Revenue	$ 52,862	$ 19,010	$ 167,182	$ 70,238