Glu Mobile (GLUU) 10-Q 8 Aug 19 2019 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2019	Aug. 01, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2019
Entity File Number	001-33368
Entity Registrant Name	Glu Mobile Inc
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	91-2143667
Entity Address, Address Line One	875 Howard Street, Suite 100
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94103
City Area Code	415
Local Phone Number	800-6100
Title of 12(b) Security	Common Stock
Trading Symbol	GLUU
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0001366246
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		145,884,823

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 99,498	$ 97,834
Accounts receivable, net	40,184	27,325
Prepaid royalties	9,830	8,520
Deferred royalties	4,885	4,410
Deferred platform commission fees	26,614	25,862
Restricted cash		110
Prepaid expenses and other assets	5,213	6,940
Total current assets	186,224	171,001
Property and equipment, net	13,329	13,888
Operating lease right of use assets	29,650
Long-term prepaid royalties	15,346	1,667
Other long-term assets	4,227	2,505
Intangible assets, net	6,836	9,145
Goodwill	116,227	116,227
Total assets	371,839	314,433
Current liabilities:
Accounts payable	23,792	10,480
Accrued liabilities	1,000	1,384
Accrued compensation	7,529	17,896
Accrued royalties	13,560	14,139
Accrued restructuring		294
Short-term operating lease liabilities	3,796
Deferred revenue	88,820	85,736
Total current liabilities	138,497	129,929
Long-term accrued royalties	15,336	1,649
Long-term operating lease liabilities	31,274
Other long-term liabilities	392	5,542
Total liabilities	185,499	137,120
Commitments and contingencies (Note 9)
Stockholders' equity:
Preferred stock, $0.0001 par value; 5,000 shares authorized at June 30, 2019 and December 31, 2018; no shares issued and outstanding at June 30, 2019 and December 31, 2018
Common stock, $0.0001 par value; 250,000 shares authorized at June 30, 2019 and December 31, 2018; 145,784 and 143,870 shares issued and outstanding at June 30, 2019 and December 31, 2018	15	14
Additional paid-in capital	623,652	617,781
Accumulated other comprehensive (loss)/income	(14)	1
Accumulated deficit	(437,313)	(440,483)
Total stockholders' equity	186,340	177,313
Total liabilities and stockholders' equity	$ 371,839	$ 314,433

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares shares in Thousands	Jun. 30, 2019	Dec. 31, 2018
CONDENSED CONSOLIDATED BALANCE SHEETS
Preferred stock, par value	$ 0.0001	$ 0.0001
Preferred stock, shares authorized	5,000	5,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	250,000	250,000
Common stock, shares issued	145,784	143,870
Common stock, shares outstanding	145,784	143,870

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 95,540	$ 90,193	$ 191,425	$ 171,636
Cost of revenue:
Platform commissions, royalties and other	32,806	32,386	65,619	61,553
Impairment of prepaid royalties and minimum guarantees			457	99
Amortization of intangible assets	1,056	1,468	2,308	2,935
Total cost of revenue	33,862	33,854	68,384	64,587
Gross profit	61,678	56,339	123,041	107,049
Operating expenses:
Research and development	19,736	22,832	46,282	45,542
Sales and marketing	35,040	29,741	63,145	56,551
General and administrative	4,951	7,608	11,586	15,498
Restructuring charge	0	0	0	80
Total operating expenses	59,727	60,181	121,013	117,671
Income/(loss) from operations	1,951	(3,842)	2,028	(10,622)
Interest and other income/(expense), net	556	(366)	1,320	(617)
Income/(loss) before income taxes	2,507	(4,208)	3,348	(11,239)
Income tax provision	0	(207)	(178)	(382)
Net income/(loss)	$ 2,507	$ (4,415)	$ 3,170	$ (11,621)
Net income/(loss) per common share - basic	$ 0.02	$ (0.03)	$ 0.02	$ (0.08)
Net income/(loss) per common share - diluted	$ 0.02	$ (0.03)	$ 0.02	$ (0.08)
Weighted average common shares outstanding - basic and diluted
Basic	145,451	140,534	144,951	139,821
Diluted	159,682	140,534	159,556	139,821

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS)
Net income/(loss)	$ 2,507	$ (4,415)	$ 3,170	$ (11,621)
Other comprehensive income:
Foreign currency translation adjustments	(30)	(5)	(15)	21
Other comprehensive income/(loss)	(30)	(5)	(15)	21
Comprehensive income/(loss)	$ 2,477	$ (4,420)	$ 3,155	$ (11,600)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY - USD ($) shares in Thousands, $ in Thousands	Common stock and additional paid-in capital	Accumulated Deficit	Accumulated other comprehensive income/(loss)	Common stock	Total
Beginning balance at Dec. 31, 2017	$ 589,976	$ (436,110)	$ (6)
Issuance of common stock upon exercise of stock options	3,263
Issuance of common stock under Employee Stock Purchase Plan	1,095
Taxes paid related to net share settlement of equity awards	(3,769)
Stock-based compensation expense	11,651
Non-cash warrant expense	1,046
Net income/(loss)		(11,621)			$ (11,621)
Other comprehensive income/(loss)			21		21
Ending balance at Jun. 30, 2018	603,262	(438,905)	15		164,372
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2017				138,745
Common stock issued				2,809
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2018				141,554
Beginning balance at Mar. 31, 2018	596,880	(434,490)	20
Issuance of common stock upon exercise of stock options	3,055
Taxes paid related to net share settlement of equity awards	(2,814)
Stock-based compensation expense	5,343
Non-cash warrant expense	798
Net income/(loss)		(4,415)			(4,415)
Other comprehensive income/(loss)			(5)		(5)
Ending balance at Jun. 30, 2018	603,262	(438,905)	15		164,372
Common Stock, Shares, Outstanding, Beginning Balance at Mar. 31, 2018				139,654
Common stock issued				1,900
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2018				141,554
Cumulative effect adjustment from adoption of ASU 2014-09		8,826
Beginning balance at Dec. 31, 2018	617,795	(440,483)	1		177,313
Issuance of common stock upon exercise of stock options	1,782
Issuance of common stock under Employee Stock Purchase Plan	1,665
Taxes paid related to net share settlement of equity awards	(6,417)
Stock-based compensation expense	8,842
Net income/(loss)		3,170			3,170
Other comprehensive income/(loss)			(15)		(15)
Ending balance at Jun. 30, 2019	623,667	(437,313)	(14)		$ 186,340
Common Stock, Shares, Outstanding, Beginning Balance at Dec. 31, 2018				143,870	143,870
Common stock issued				1,914
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2019				145,784	145,784
Beginning balance at Mar. 31, 2019	623,624	(439,820)	16
Issuance of common stock upon exercise of stock options	469
Taxes paid related to net share settlement of equity awards	(2,461)
Stock-based compensation expense	2,035
Net income/(loss)		2,507			$ 2,507
Other comprehensive income/(loss)			(30)		(30)
Ending balance at Jun. 30, 2019	$ 623,667	$ (437,313)	$ (14)		$ 186,340
Common Stock, Shares, Outstanding, Beginning Balance at Mar. 31, 2019				145,176
Common stock issued				608
Common Stock, Shares, Outstanding, Ending Balance at Jun. 30, 2019				145,784	145,784

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income/(loss)	$ 3,170	$ (11,621)
Adjustments to reconcile net income/(loss) to net cash generated from/(used in) operating activities:
Depreciation	2,088	1,937
Amortization of Intangible Assets	2,308	2,935
Stock-based compensation	8,842	11,651
Warrant expense		1,046
Other non-cash adjustments	(9)	969
Impairment of prepaid royalties and minimum guarantees	457	99
Non-cash lease expense	1,409
Changes in operating assets and liabilities:
Accounts receivable	(12,782)	(3,569)
Prepaid royalties	(578)	(933)
Deferred royalties	(475)	(782)
Deferred platform commission fees	(752)	(4,245)
Prepaid expenses and other assets	70	199
Accounts payable, accrued restructuring, and other accrued liabilities	13,648	(3,993)
Accrued compensation	(10,367)	(10,049)
Accrued royalties	(1,760)	(1,958)
Deferred revenue	3,084	14,029
Other long-term liabilities	12	49
Operating lease liabilities	(1,476)
Net cash generated from/(used in) operating activities	6,889	(4,236)
Cash flows from investing activities:
Purchase of property and equipment	(2,127)	(1,615)
Proceeds from divestiture of Moscow studio		2,726
Other investing activities	(155)
Net cash (used in)/generated from investing activities	(2,282)	1,111
Cash flows from financing activities:
Proceeds from exercise of stock options and purchases under the ESPP	3,447	4,358
Taxes paid related to net share settlement of equity awards	(6,417)	(3,769)
Net cash (used in)/generated from financing activities	(2,970)	589
Effect of exchange rate changes on cash	(83)	(202)
Net increase/(decrease) in cash, cash equivalents and restricted cash	1,554	(2,738)
Cash, cash equivalents and restricted cash at beginning of period	97,944	64,366
Cash, cash equivalents and restricted cash at end of period	$ 99,498	$ 61,628

The Company, Basis of Presentat

The Company, Basis of Presentation and Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2019
The Company, Basis of Presentation and Summary of Significant Accounting Policies
The Company, Basis of Presentation and Summary of Significant Accounting Policies	Note 1 — The Company, Basis of Presentation and Summary of Significant Accounting Policies ​ Glu Mobile Inc. (the “Company” or “Glu”) was incorporated in the state of Nevada in May 2001 and reincorporated in the state of Delaware in March 2007. The Company develops, publishes, and markets a portfolio of games designed for users of smartphones and tablet devices who download and make purchases within its games through direct-to-consumer digital storefronts, such as the Apple App Store, Google Play Store and others (“Digital Storefronts”). The Company creates games based on its own original brands, as well as third-party licensed brands, properties and other content . ​ Principles of Consolidation and Basis of Presentation ​ The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles in the United States (“GAAP”) for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 28, 2019. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, which the Company believes are necessary for a fair statement of the Company’s financial position as of June 30, 2019 and its unaudited condensed consolidated results of operations for the three and six months ended June 30, 2019 and 2018, respectively. These unaudited condensed consolidated financial statements are not necessarily indicative of the results to be expected for the entire year. The unaudited condensed consolidated balance sheet presented as of December 31, 2018 has been derived from the audited consolidated financial statements as of that date, and the unaudited condensed consolidated balance sheet presented as of June 30, 2019 has been derived from the unaudited condensed consolidated financial statements as of that date. Certain prior year balances have been reclassified to conform to the current year presentation. Such reclassifications did not materially affect revenue, operating income/(loss), net income/(loss), cash flows, total assets, total liabilities or stockholders’ equity. ​ The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated. ​ Concentration of Credit Risk ​ Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents and accounts receivable. ​ The Company derives its accounts receivable from revenue earned from customers or through Digital Storefronts located in the United States and other locations outside of the United States. The Company performs ongoing credit evaluations of its customers’ and the Digital Storefronts’ financial condition and, generally, requires no collateral from its customers or the Digital Storefronts. The Company bases its allowance for doubtful accounts on management’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable. The Company reviews past due balances over a specified amount individually for collectability on a monthly basis. It reviews all other balances quarterly. The Company charges off accounts receivable balances against the allowance when it determines that the amount will not be recovered. ​ The following table summarizes the revenue from customers or aggregate purchases through Digital Storefronts in excess of 10% of the Company’s revenue: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ June 30, ​ ​ 2019 ​ 2018 ​ 2019 ​ 2018 Apple 52.6 % ​ 54.9 % ​ 52.8 % ​ 56.3 % Google 34.6 % ​ 29.9 % ​ 34.4 % ​ 29.7 % ​ At June 30, 2019, Apple Inc. (“Apple”), Google Inc. (“Google”), and Tapjoy Inc. (“Tapjoy”) accounted for 61.5%, 20.7%, and 12.1% of total accounts receivable. At December 31, 2018, Apple, Google, and Tapjoy accounted for 40.8%, 30.3%, and 21.1%, respectively, of total accounts receivable. No other customer or Digital Storefront represented more than 10% of the Company’s total accounts receivable as of these dates. ​ Operating Leases ​ The Company determines if an arrangement is a lease at inception. Its operating lease agreements are primarily for real estate space and are included within operating lease right of use (“ROU”) assets and operating lease liabilities on the condensed consolidated balance sheets. ​ ROU assets represent the Company’s right to use an underlying asset for the lease term and operating lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate, determined as the rate it would have incurred to borrow based on its credit quality at the inception of the lease over a similar term and in the economic environment where the leased asset is located, to calculate the present value of lease payments. ROU assets also exclude lease incentives. Many of the Company’s lease agreements include options to extend the lease, which the Company does not include in the minimum lease terms unless they are reasonably certain to be exercised. Rental expense for lease payments related to operating leases is recognized on a straight-line basis over the lease term. ​ Recent Accounting Pronouncements ​ Recently Issued Accounting Pronouncements Not Yet Adopted ​ In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles—Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment . ​ In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ​ In August 2018, the FASB issued ASU 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

Net Income_(Loss) Per Share

Net Income/(Loss) Per Share	6 Months Ended
	Jun. 30, 2019
Net Income/(Loss) Per Share
Net Income/(Loss) Per Share	Note 2 — Net Income/(Loss) Per Share ​ The Company computes basic net income/(loss) per share by dividing its net income/(loss) for the period by the weighted average number of common shares outstanding during the period. ​ Diluted net income per share is computed by dividing the net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period, including potential dilutive common stock instruments. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ ​ 2019 2018 ​ 2019 2018 Net income/(loss) ​ $ 2,507 ​ $ (4,415) ​ $ 3,170 ​ $ (11,621) ​ Shares used to compute net income/(loss) per share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares used to compute basic net income/(loss) per share ​ ​ 145,451 ​ ​ 140,534 ​ ​ 144,951 ​ ​ 139,821 ​ Dilutive potential common shares ​ 14,231 ​ — ​ 14,605 ​ — ​ Weighted average shares used to compute diluted net income/(loss) per share ​ 159,682 ​ 140,534 ​ 159,556 ​ 139,821 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic net income/(loss) per share ​ $ 0.02 ​ $ (0.03) ​ ​ 0.02 ​ ​ (0.08) ​ Diluted net income/(loss) per share ​ $ 0.02 ​ $ (0.03) ​ $ 0.02 ​ $ (0.08) ​ ​ The weighted average of the following options to purchase common stock, warrants to purchase common stock, and restricted stock units (“RSUs”) have been excluded from the computation of diluted net income/(loss) per share of common stock for the periods presented because including them would have had an anti-dilutive effect: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 ​ 2018 Warrants to purchase common stock ​ ​ — ​ ​ 3,267 ​ ​ — ​ ​ 3,267 Options to purchase common stock ​ ​ 415 ​ ​ 19,574 ​ ​ 313 ​ ​ 18,870 RSUs ​ ​ 7 ​ ​ 4,451 ​ ​ 4 ​ ​ 4,956 ​ ​ ​ 422 ​ ​ 27,292 ​ ​ 317 ​ ​ 27,093 ​

Revenue from Contracts with Cus

Revenue from Contracts with Customers	6 Months Ended
	Jun. 30, 2019
Revenue from Contracts with Customers
Revenue from Contracts with Customers	Note 3 — Revenue from Contracts with Customers Disaggregation of Revenue ​ The following table summarizes revenue from contracts with customers for the three and six months ended June 30, 2019 and June 30, 2018: ​ ​ The following table summarizes revenue from contracts with customers for the three and six months ended June 30, 2019 and June 30, 2018: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ June 30, ​ ​ ​ 2019 ​ 2018 ​ ​ 2019 ​ ​ 2018 Micro-Transactions (over-time revenue recognition) ​ $ 82,659 $ 77,078 ​ $ 166,203 ​ $ 149,004 Advertisements and offers (point-in-time revenue recognition) ​ 12,864 13,023 ​ ​ 25,194 ​ 22,380 Other (point-in-time revenue recognition) ​ ​ 17 ​ 92 ​ ​ 28 ​ ​ 252 Total Revenue ​ $ 95,540 $ 90,193 ​ $ 191,425 ​ $ 171,636 ​ The Company reports as a single segment – mobile games. In the disaggregation above, the Company categorizes revenue by type, and by over-time or point-in-time recognition. ​ Micro-Transactions ​ The Company distributes its games for smartphones and tablets to the end customer through Digital Storefronts. Within these Digital Storefronts, users can download the Company’s free-to-play games and pay to acquire virtual currency which can be redeemed in the games for virtual goods. The initial download of the mobile game from the Digital Storefront does not create a contract under Accounting Standard Codification 606, Revenue from Contracts with Customers (“ ​ (1) Ongoing game related services such as hosting of game play, storage of customer content, when and if available content updates, maintaining the virtual currency management engine, tracking gameplay statistics, matchmaking as it relates to multiple player gameplay, etc. (2) Obligation to the paying player to continue displaying and providing access to the purchased virtual goods within the game. ​ Neither of these obligations are considered distinct since the actual mobile game and the related ongoing services are both required to purchase and benefit from the related virtual goods. As such, the Company’s performance obligations represent a single combined performance obligation which is to make the game and the ongoing game related services available to the players. The transaction price, which is the amount paid for virtual currency/goods by the player, is allocated entirely to this single combined performance obligation. The Company recognizes revenue from in-application purchases of durable virtual currency/goods over the estimated average playing period of paying users. The Company’s revenue from consumable virtual goods has been insignificant. ​ Advertisements and Offers ​ The Company has relationships with certain advertising service providers for advertisements within its mobile games. Revenue from these advertising service providers is generated through impressions, clickthroughs, offers and banner ads. Offers are the type of advertisements where the players are rewarded with virtual currency for completing specified actions, such as watching a short video, subscribing to a service or completing a survey. The Company has determined the advertising buyer to be its customer and displaying the advertisements within the mobile games is identified as the single performance obligation. Revenue from advertisements and offers are recognized at the point-in- time the advertisements are displayed in the game or the offer has been completed by the user as the customer simultaneously receives and consumes the benefits provided from these services. ​ Other ​ Other revenue was immaterial for the three and six months ended June 30, 2019 and June 30, 2018. ​ Contract Balances ​ The following table provides information about receivables, contracts assets, and contract liabilities from contracts with customers: ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2019 ​ December 31, 2018 Receivables, which are included in accounts receivable, net $ 40,184 ​ $ 27,325 Contract assets ​ - ​ ​ - Contract liabilities, which are included in deferred revenue $ 88,820 ​ $ 85,736 ​ The Company receives payments from customers based on billing terms established in the Company’s contracts. Contract asset relates to the Company’s right to consideration for its completed performance under the contract. At June 30, 2019 and December 31, 2018, there were no contract assets recorded in the Company’s consolidated balance sheet. Accounts receivable are recorded when the right to consideration becomes unconditional. ​ Deferred revenue relates to payments received in advance of performance under the contract. Deferred revenue is recognized as revenue as the Company performs under the contract. The Company had $85,736 in deferred revenue as of December 31, 2018, of which $21,914 and $84,612 was earned in the three and six months ended June 30, 2019. The Company had $67,788 in deferred revenue as of December 31, 2017, of which $15,622 and $66,928, respectively, was earned in the three and six months ended June 30, 2018. No revenue from the performance obligations satisfied in prior periods was recognized during the three and the six months ended June 30, 2019 and 2018.

Fair Value Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2019
Fair Value Measurements
Fair Value Measurements	Note 4 — Fair Value Measurements ​ Fair Value Measurements The Company accounts for fair value in accordance with Accounting Standard Codification 820, Fair Value Measurements and Disclosures Level 1 ​ Level 2 ​ Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities. ​ The Company’s financial assets as of June 30, 2019 are presented below at fair value and were classified within the fair value hierarchy as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 June 30, 2019 Financial Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 99,498 ​ $ — ​ $ — ​ $ 99,498 ​ Other investments ​ ​ — ​ ​ — ​ ​ 1,565 ​ ​ 1,565 ​ Total financial assets ​ $ 99,498 ​ $ — ​ $ 1,565 ​ $ 101,063 ​ ​ The Company’s financial assets as of December 31, 2018 are presented below at fair value and were classified within the fair value hierarchy as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 December 31, 2018 Financial Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 97,834 ​ $ — ​ $ — ​ $ 97,834 Restricted cash ​ ​ 110 ​ ​ — ​ ​ — ​ ​ 110 Other investments ​ ​ — ​ ​ — ​ ​ 1,410 ​ ​ 1,410 Total financial assets ​ $ 97,944 ​ $ — ​ $ 1,410 ​ $ 99,354 ​ The Company’s cash and cash equivalents, which were held in operating bank and money market accounts, are classified within Level 1 of the fair value hierarchy because they are valued using quoted market prices, broker or dealer quotations or alternative pricing sources with reasonable levels of price transparency. The carrying value of accounts receivable and payables approximates fair value due to the short time to expected payment or receipt of cash. The carrying value of other investments approximates fair value, as the Company purchased these investments in fiscal 2017 and there has been no events or changes in circumstances that would have had a significant effect on the fair value of these investments at June 30, 2019 and December 31, 2018.

Cash, Cash Equivalents and Rest

Cash, Cash Equivalents and Restricted Cash	6 Months Ended
	Jun. 30, 2019
Cash, Cash Equivalents and Restricted Cash
Cash, Cash Equivalents and Restricted Cash	Note 5 — Cash, Cash Equivalents and Restricted Cash ​ The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the unaudited condensed consolidated balance sheets that sum to the total of the same amounts shown in the unaudited statements of cash flows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ ​ June 30, ​ 2019 ​ 2018 Cash and cash equivalents at beginning of period ​ $ 97,834 ​ $ 63,764 Restricted cash at beginning of the period ​ 110 ​ 602 Cash, cash equivalents and restricted cash at beginning of period ​ $ 97,944 ​ $ 64,366 Cash and cash equivalents at end of period ​ ​ 99,498 ​ ​ 61,518 Restricted cash at end of the period ​ ​ — ​ ​ 110 Cash, cash equivalents and restricted cash at end of period ​ $ 99,498 ​ $ 61,628 ​

Balance Sheet Components

Balance Sheet Components	6 Months Ended
	Jun. 30, 2019
Balance Sheet Components
Balance Sheet Components	Note 6 — Balance Sheet Components ​ Accounts Receivable, net ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, ​ 2019 2018 Accounts receivable ​ $ 40,184 ​ $ 27,325 ​ Less: Allowance for doubtful accounts ​ — ​ — ​ ​ ​ $ 40,184 ​ $ 27,325 ​ ​ Accounts receivable includes amounts billed and unbilled as of the respective balance sheet dates, but net of platform commissions paid to the Digital Storefronts. The Company had no bad debts during the three and six months ended June 30, 2019 and 2018.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets
Goodwill and Intangible Assets	Note 7 — Goodwill and Intangible Assets ​ Intangible Assets ​ The Company’s intangible assets were acquired primarily in various acquisitions as well as in connection with the purchase of certain trademarks, brand assets and licensed content. The carrying amounts and accumulated amortization expense of the acquired intangible assets at June 30, 2019 and December 31, 2018 were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2019 ​ December 31, 2018 ​ Estimated Gross Accumulated Net Gross Accumulated Net ​ ​ Useful ​ Carrying ​ Amortization ​ Carrying ​ Carrying ​ Amortization ​ Carrying ​ ​ Life ​ Value ​ Expense ​ Value ​ Value ​ Expense ​ Value Intangible assets amortized to cost of revenue: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Titles, content and technology 3 - 5 yrs ​ $ 21,117 ​ $ (14,281) ​ $ 6,836 ​ $ 21,117 ​ $ (12,203) ​ $ 8,914 ​ Carrier contract and related relationships 5 yrs ​ 700 ​ ​ (700) ​ ​ — ​ 700 ​ ​ (648) ​ ​ 52 ​ Trademarks 7 yrs ​ 5,000 ​ ​ (5,000) ​ ​ — ​ 5,000 ​ ​ (4,821) ​ ​ 179 ​ ​ ​ ​ ​ $ 26,817 ​ $ (19,981) ​ $ 6,836 ​ $ 26,817 ​ $ (17,672) ​ $ 9,145 ​ ​ Acquisition-related intangibles included in the above table are finite-lived and are being amortized on a straight-line basis over their estimated lives, which approximate the pattern in which the economic benefits of the intangible assets are realized. The Company has included amortization of acquired intangible assets directly attributable to revenue-generating activities in cost of revenue. ​ During the three months ended June 30, 2019 and 2018, the Company recorded amortization expense in the amounts of $1,056 and $1,468, respectively, in cost of revenue. During the six months ended June 30, 2019 and 2018, the Company recorded amortization expense in the amounts of $2,308 and $2,935, respectively, in cost of revenue. ​ As of June 30, 2019, total expected future amortization related to intangible assets was as follows: ​ ​ ​ ​ ​ ​ Amortization ​ ​ to Be Included in ​ ​ Cost of Year Ending December 31, Revenue 2019 (remaining 6 months) ​ $ 2,078 2020 ​ 3,258 2021 ​ 1,500 Total intangible assets ​ $ 6,836 ​ Goodwill ​ The Company had $116,227 in goodwill as of June 30, 2019 and December 31, 2018. There was no change in this account balance during the six months ended June 30, 2019. In accordance with Accounting Standard Codification 350, Intangibles – Goodwill and Other

Leases

Leases	6 Months Ended
	Jun. 30, 2019
Leases
Leases	Note 8 – Leases ​ Leases 2018 were prepared under the guidance of ASC 840, which is also referred to herein as "legacy GAAP" or the "previous guidance". ​ The new standard provides a number of optional practical expedients in transition. The Company elected the ‘package of practical expedients’, which permits the Company to not reassess under the new standard for prior conclusions about lease identification, lease classification, and initial direct costs. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company elected the short-term lease recognition exemption, and for those leases that qualified, the Company did not recognize ROU assets or lease liabilities, and this included not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. The Company also elected the practical expedient to not separate lease and non-lease components for all of its leases. ​ ​ Certain of the Company’s lease agreements contain lease components (for example, fixed payments such as rent) and non-lease components such as common-area maintenance costs. Both of these types of provisions are accounted for as a single lease component. For such arrangements, there may be a variability in future lease payments as the amount of the non-lease components is typically revised from one period to the next. These variable lease payments, which are primarily comprised of common-area maintenance, utilities, and real estate taxes that are passed on from the lessor in proportion to the space leased by the Company within the entire building or building complex, are recognized in the period in which the obligation for those payments is incurred. ​ The Company does not include any of its renewal options when calculating its lease liability as the Company is not reasonably certain whether it will exercise these renewal options at this time. The weighted-average remaining non-cancelable lease term for the Company’s operating leases was 8.02 years for the six months ended June 30, 2019. The weighted-average discount rate was 6.9% for the six months ended June 30, 2019. Rent expense for the three months ended June 30, 2019 and 2018 was $653 and $1,444, respectively. Rent expense for the six months ended June 30, 2019 and 2018 was $2,004 and $2,889, respectively. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As Previously Reported December 31, 2018 ​ New Lease Standard Adjustment ​ As Adjusted January 1, 2019 Operating lease right of use assets ​ $ — ​ ​ 28,345 ​ $ 28,345 Short-term operating lease liabilities ​ ​ — ​ ​ 3,732 ​ ​ 3,732 Long-term operating lease liabilities ​ ​ — ​ ​ 30,197 ​ ​ 30,197 Deferred rent payable* ​ $ 5,284 ​ ​ (5,284) ​ $ — ​ * As of December 31, 2018, $122 and $5,162 of Deferred rent payable is included within the Accounts payable and Other long-term liabilities line items on the condensed consolidated balance sheet, respectively. ​ During the three months ended June 30, 2019, the Company leased additional space in its San Francisco office, and extended the lease term of one of its office leases in India. As a result of these lease modifications, the Company re-measured the lease liability and adjusted the ROU asset by an aggregate of $2,765 on the modification dates. ​ In June 2019, the Company signed an additional operating lease of approximately 24,500 square feet of office space in Foster City, California (the “Foster City Lease”). The term of this lease is expected to commence in September 2019. The Company will record an ROU asset and lease liability on its balance sheet when the possession of the space is provided to the Company (the “Commencement Date”). The Foster City Lease expires 89 months after the Commencement Date with an option to extend the lease for an additional 5-year period. Future minimum rental payments under this lease during the 89 -month term are $12,565 in aggregate. The Foster City Lease is not reflected on the condensed consolidated balance sheet as of June 30, 2019 and the table below. ​ ​ ​ ​ ​ ​ ​ ​ Operating Year Ending December 31, Leases 2019 (remaining 6 months) ​ $ 3,116 2020 ​ 5,686 2021 ​ 5,316 2022 ​ ​ 5,191 2023 ​ ​ 5,177 Thereafter ​ ​ 21,810 Total lease payments ​ $ 46,296 Less: imputed interest ​ ​ (11,226) Total ​ $ 35,070 ​ As previously disclosed in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 and under the previous lease accounting standard, ASC 840, Leases ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ Operating ​ ​ Lease Year Ending December 31, Payments 2019 ​ $ 5,486 ​ 2020 ​ 5,219 ​ 2021 ​ 4,609 ​ 2022 ​ 4,637 ​ 2023 and thereafter ​ 24,894 ​ ​ ​ $ 44,845 ​ ​ Supplemental information related to the Company’s leases for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ Operating cash flows from operating leases (1) ​ $ 2,853 ​ (1) Does not include certain cash incentives received by the Company in connection with the amendment of an office lease for one of its studios. ​

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies
Commitments and Contingencies	Note 9 — Commitments and Contingencies ​ Minimum Guaranteed Royalties and Developer Commitments ​ The Company has entered into license and publishing agreements with various celebrities, athletes, sports and entertainment organizations, and other well-known brands and properties ​ At June 30, 2019, future unpaid minimum guaranteed royalty commitments were as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Future ​ ​ Minimum ​ ​ Guarantee ​ Commitments 2019 (remaining 6 months) ​ $ 260 2020 ​ 6,900 2021 ​ ​ 6,000 2022 ​ ​ 3,000 2023 and thereafter ​ ​ 6,000 ​ ​ $ 22,160 ​ The amounts included in the table above reflect the Company’s minimum cash obligations for the respective calendar years, but do not necessarily represent the periods in which they will be expensed in the Company’s consolidated financial statements. ​ Licensor commitments include $22,141 of commitments due to licensors that have been recorded in current and long-term liabilities and a corresponding amount in current and long-term assets because payment is not contingent upon performance by the licensor. The classification of commitments between long-term and short-term is determined based on the timing of expected recoupment of earned royalties calculated on projected revenue for the licensed intellectual property games. ​ Indemnification Arrangements ​ The Company has entered into agreements under which it indemnifies each of its officers and directors during his or her lifetime for certain events or occurrences while the officer or director is or was serving at the Company’s request in that capacity. The maximum potential amount of future payments the Company could be required to make under these indemnification agreements is unlimited; however, the Company has a director and officer insurance policy that limits its exposure and enables the Company to recover a portion of any future amounts paid. ​ In the ordinary course of its business, the Company includes standard indemnification provisions in most of its commercial agreements with Digital Storefronts and licensors. Pursuant to these provisions, the Company generally indemnifies these parties for losses suffered or incurred in connection with its games, including as a result of intellectual property infringement, viruses, worms and other malicious software, and legal or regulatory violations. The term of these indemnity provisions is generally perpetual after execution of the corresponding license agreement, and the maximum potential amount of future payments the Company could be required to make under these provisions is often unlimited. To date, the Company has not incurred costs to defend lawsuits or settle indemnified claims of these types and, accordingly, has ​ Contingencies ​ From time to time, the Company is subject to various claims, complaints and legal actions in the normal course of business. The Company assesses its potential liability by analyzing specific litigation and regulatory matters using available information. The Company’s estimate of losses is developed in consultation with inside and outside counsel, which involves a subjective analysis of potential results and outcomes, assuming various combinations of appropriate litigation and settlement strategies. After taking all of the above factors into account, the Company determines whether an estimated loss from a contingency should be accrued by assessing whether a loss is deemed reasonably probable and the amount can be reasonably estimated. The Company further determines whether an estimated loss from a contingency should be disclosed by assessing whether a material loss is deemed reasonably possible. Such disclosure will include an estimate of the additional loss or range of loss or will state that an estimate cannot be made. ​ On March 14, 2018, Jeffrey Tseng, the former Chief Executive Officer of Crowdstar, filed a complaint in the Superior Court of the State of California for the County of Santa Clara against Time Warner Inc., Rachel Lam, Intel Capital Corporation, Middlefield Ventures Inc. and Jose Blanc (collectively, the “Non-Glu Defendants”), the Company and additional yet-to-be-named defendants. The complaint alleged (i) breach of fiduciary duty by the Non-Glu Defendants, (ii) aiding and abetting breach of fiduciary duty by the Company and (iii) intentional interference with contract, intentional interference with prospective economic advantage, negligent interference with prospective economic advantage and unfair competition by each of the defendants, in each case relating to circumstances arising from the Company’s acquisition of Crowdstar and the events leading up to the acquisition. Mr. Tseng was seeking compensatory damages and exemplary damages, each in an amount to be determined at trial, along with costs of suit, reasonable attorneys’ fees and such other relief as the Court may deem proper. The Company and the Non-Glu Defendants filed demurrers in response to Mr. Tseng’s complaint on August 17, 2018, Mr. Tseng filed responses to these demurrers on September 17, 2018, and the Company and the Non-Glu Defendants filed reply briefs in support of their demurrers on October 15, 2018. A hearing with respect to the demurrers was held on November 30, 2018. On January 24, 2019, the judge issued an order sustaining the demurrers on all six claims and gave Mr. Tseng 10 days’ leave to amend his complaint. On March 4, 2019, the Company, the Non-Glu Defendants and Mr. Tseng entered into a settlement agreement pursuant to which Mr. Tseng, on one hand, and the Company and the Non-Glu Defendants, on the other hand, provided mutual releases of claims related to the subject matter of Mr. Tseng’s lawsuit and Mr. Tseng agreed to dismiss his lawsuit with prejudice. The Company did not pay any amounts to Mr. Tseng in settlement of this matter. Mr. Tseng dismissed his lawsuit with prejudice on March 6, 2019 and, accordingly, the Company considers this matter to be resolved. The Company does not believe it is party to any currently pending litigation, the outcome of which is reasonably possible to have a material adverse effect on its operations, financial position or liquidity. However, the ultimate outcome of any litigation is uncertain and, regardless of outcome, litigation can have an adverse impact on the Company because of defense costs, potential negative publicity, diversion of management resources and other factors.

Stockholders' Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2019
Stockholders' Equity
Stockholders' Equity	Note 10 — Stockholders’ Equity ​ Warrants to Purchase Common Stock ​ As of June 30, 2019 and December 31, 2018, 1,600 warrants issued to celebrity licensors and entities affiliated with one of the celebrity licensors were outstanding. These warrants have a weighted average exercise price of $4.61 per share and an average contractual term of 5.44 years. During the three months ended June 30, 2019 and 2018, the Company recognized expenses with respect to these warrants of $0 and $798, respectively. During the six months ended June 30, 2019 and 2018, the Company recognized expenses with respect to these warrants of $0 and $1,046 respectively.

Stock Option and Other Benefit

Stock Option and Other Benefit Plans	6 Months Ended
	Jun. 30, 2019
Stock Option and Other Benefit Plans
Stock Option and Other Benefit Plans	Note 11 — Stock Option and Other Benefit Plans ​ 2007 Equity Incentive Plan ​ In April 2018, the Company’s Board of Directors approved, and in June 2018, the Company’s stockholders approved, the fourth Amended and Restated 2007 Equity Incentive Plan (the “Fourth Amended 2007 Plan”). The Fourth Amended 2007 Plan included an increase of 10,000 shares in the aggregate number of shares of common stock authorized for issuance under the plan. It also removed the limitation on the number of shares that can be issued in any calendar year to a participant. ​ In April 2019, the Company’s Board of Directors approved, and in June 2019, the Company’s stockholders approved, the fifth Amended and Restated 2007 Equity Incentive Plan (the “Fifth Amended 2007 Plan”). The Fifth Amended 2007 Plan includes an increase of 4,600 shares in the aggregate number of shares of common stock authorized for issuance under the plan. ​ Performance-based Equity Awards ​ The Company awards performance-based stock options (“PSOs”) and/or performance-based restricted stock units (“PSUs”) to its executives and certain employees in the Company. These performance-based awards are subject to the achievement of specified performance goals. They become eligible to vest only if the applicable performance goals are achieved and will vest only if the grantee remains employed with the Company through each applicable vesting date. The number of shares that may vest depend on the extent to which the Company achieves the specified performance goals. The fair value of these awards is estimated on the date of grant. The PSOs have a contractual term of 10 years. If the performance goals are not met as of the end of the performance period, no compensation expense is recognized and any previously recognized expense is reversed. The expected cost is based on the awards that are probable to vest and is recognized over the service period. The awards under these programs were granted under the 2007 Equity Incentive Plan. ​ 2007 Employee Stock Purchase Plan ​ In April 2017, the Company’s Board of Directors approved, and in June 2017, the Company’s stockholders approved, the Amended and Restated 2007 Employee Stock Purchase Plan (the “Amended 2007 Purchase Plan”). The Amended 2007 Purchase Plan included an increase of 4,000 shares in the aggregate number of shares of common stock authorized for issuance under the plan and removal of the expiration date of the plan. ​ 2018 Equity Inducement Plan In April 2018, the Compensation Committee of the Company’s Board of Directors adopted the 2018 Equity Inducement Plan (the “2018 Plan”). The 2018 Plan replaced the Company’s 2008 Equity Inducement Plan that expired by its terms in March 2018, and is intended to augment the shares available for issuance under the Fourth Amended 2007 Plan. The Company did not seek stockholder approval for the 2018 Plan. As such, awards under the Inducement Plan will be granted in accordance with Nasdaq Listing Rule 5635(c)(4) and only to persons not previously an employee or director of the Company, or following a bona fide period of non-employment, as an inducement material to such individuals entering into employment with the Company. The Company initially reserved 400 shares of common stock for issuance under the 2018 Plan. ​ RSU Activity ​ A summary of the Company’s RSU activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Units ​ Grant Date ​ Contractual ​ ​ Intrinsic ​ Outstanding Fair Value ​ Term (Years) ​ ​ Value Awarded and unvested, December 31, 2018 3,021 ​ $ 3.01 ​ ​ ​ ​ ​ Granted 878 ​ $ 8.82 ​ ​ ​ ​ ​ Vested (1,013) ​ $ 3.53 ​ ​ ​ ​ ​ Forfeited (132) ​ $ 2.77 ​ ​ ​ ​ ​ Awarded and unvested, June 30, 2019 2,754 ​ $ 4.69 ​ 1.16 ​ $ 19,745 ​ PSU Activity ​ A summary of the Company’s PSU activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Units ​ Grant Date ​ Contractual ​ ​ Intrinsic ​ Outstanding Fair Value ​ Term (Years) ​ ​ Value Awarded and unvested, December 31, 2018 ​ 3,530 ​ $ 5.45 ​ ​ ​ ​ ​ Granted ​ 327 ​ $ 9.16 ​ ​ ​ ​ ​ Vested ​ (538) ​ $ 4.27 ​ ​ ​ ​ ​ Forfeited ​ (179) ​ $ 6.03 ​ ​ ​ ​ ​ Awarded and unvested, June 30, 2019 ​ 3,140 ​ $ 6.01 ​ 1.32 ​ $ 22,544 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PSUs expected to vest at June 30, 2019 ​ 414 ​ $ 4.45 ​ 0.45 ​ $ 2,969 ​ PSO Activity ​ A summary of the Company’s PSO activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Share ​ Exercise ​ Contractual ​ ​ Intrinsic ​ Outstanding Price ​ Term (Years) ​ ​ Value Balance as of December 31, 2018 ​ 6,756 ​ $ 4.51 ​ ​ ​ ​ ​ Exercised ​ (173) ​ $ 3.59 ​ ​ ​ ​ ​ Balance as of June 30, 2019 ​ 6,583 ​ $ 4.54 ​ 8.65 ​ $ 17,393 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PSOs expected to vest at June 30, 2019 ​ 364 ​ $ 3.60 ​ 8.35 ​ $ 1,312 PSO exercisable at June 30, 2019 ​ 3,339 ​ $ 3.60 ​ 8.30 ​ $ 11,961 ​ ​ ​ Stock Option Activity ​ The following table summarizes the Company’s stock option activity for the six months ended June 30, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options Outstanding ​ ​ ​ ​ ​ ​ ​ Weighted Weighted ​ ​ ​ ​ Number ​ Average ​ Average Remaining ​ Aggregate ​ ​ of ​ Exercise ​ Contractual ​ Intrinsic ​ ​ Shares ​ Price ​ Term (Years) ​ Value Balances at December 31, 2018 18,491 $ 3.39 ​ ​ ​ ​ ​ Options granted 538 ​ ​ 8.74 ​ ​ ​ ​ ​ ​ Options canceled (592) ​ ​ 5.42 ​ ​ ​ ​ ​ ​ Options exercised (652) ​ ​ 2.89 ​ ​ ​ ​ ​ ​ Balances at June 30, 2019 17,785 ​ $ 3.50 7.53 ​ $ 65,871 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options exercisable at June 30, 2019 8,607 ​ $ 3.02 6.81 ​ $ 35,780 ​ ​ The aggregate intrinsic value in the preceding table is calculated as the difference between the exercise price of the underlying awards and the quoted closing price of the Company’s common stock on The Nasdaq Global Select Market of $7.18 per share as of June 28, 2019 ​ Stock-Based Compensation ​ The cost of RSUs and PSUs are determined using the fair value of the Company’s common stock based on the quoted closing price of the Company’s common stock on the date of grant. RSUs typically vest and are settled over approximately a four-year period with 25% of the shares vesting on or around the one-year anniversary of the grant date and the remaining shares vesting quarterly thereafter. Compensation cost is amortized on a straight-line basis over the requisite service period. Vesting of PSOs and PSUs requires continuous services by the recipient of those awards and achieving performance-based goals which are solely related to the Company’s operations. ​ Under Accounting Standard Codification 718, Compensation-Stock Compensation ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performance Stock Options ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ 2019 ​ 2018 ​ 2019 ​ 2018 Dividend yield — % — % — % — % Risk-free interest rate — % — % — % 2.36 % Expected volatility — % — % — % 62.6 % Expected term (years) — ​ — ​ — ​ 5.97 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock Options ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ 2019 ​ 2018 ​ 2019 ​ 2018 Dividend yield — % — % — % — % Risk-free interest rate 2.07 % 2.71 % 2.15 % 2.49 % Expected volatility 56.1 % 57.9 % 56.1 % 58.4 % Expected term (years) 4.00 ​ 4.00 ​ 4.00 ​ 4.00 ​ ​ ​ The expected term of stock options gave consideration to early exercises, post-vesting cancellations and the options’ contractual term ranging from 6 to 10 years. The Company does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term for the PSOs as the Company had not granted such awards prior to October 2017. As a result, the Company used the simplified method to calculate the expected term estimate based on the vesting and contractual terms of the PSOs. Under the simplified method, the expected term is equal to the average of the stock-based awards vesting period and their contractual term. The risk-free interest rate for the expected term of the option is based on the U.S. Treasury Constant Maturity Rate as of the date of grant. The Company based its expected volatility on its own historical volatility. The weighted-average fair value of stock options granted during the six months ended June 30, 2019 and 2018 was $3.94 and $1.92 per share, respectively. ​ The following table summarizes the consolidated stock-based compensation expense by line items in the unaudited condensed consolidated statement of operations: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 2018 ​ Research and development ​ $ 1,128 ​ $ 2,728 ​ $ 5,074 ​ $ 5,927 ​ Sales and marketing ​ 55 ​ 609 ​ 881 ​ 1,262 ​ General and administrative ​ 852 ​ 2,006 ​ 2,887 ​ 4,462 ​ Total stock-based compensation expense ​ $ 2,035 ​ $ 5,343 ​ $ 8,842 ​ $ 11,651 ​ ​ Stock-based compensation expense for the three and six months ended June 30, 2019 included a reversal of previously accrued expense of $2,526 due to a decrease in the vesting probability of certain performance-based equity awards. ​ The following table summarizes total compensation expense related to unvested awards not yet recognized as of June 30, 2019: ​ ​ ​ ​ ​ ​ Unrecognized ​ ​ Expense for ​ ​ Awards Stock options ​ $ 15,217 RSUs ​ ​ 11,667 PSUs (1) ​ ​ 632 PSOs (1) ​ ​ 443 Total unrecognized compensation expense ​ $ 27,959 ​ (1) The unrecognized compensation for PSOs and PSUs vesting in FY2021 and FY2022 is excluded in the table above as the Company does not have a reasonable basis upon which to estimate the vesting probability of such awards in those future periods. ​ The unrecognized compensation expense related to stock options and RSUs will be recognized over a weighted average period of 2.25 years and 2.08 years, respectively. The unrecognized compensation expense related to PSOs and PSUs will be recognized over a weighted average period of 0.63 and 0.45 years, respectively.

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2019
Income Taxes
Income Taxes	Note 12 – Income Taxes ​ The Company recorded an income tax expense of $0 and $178 for the three and six months ended June 30, 2019, respectively, and an income tax expense of $207 and $382 for the three and six months ended June 30, 2018, respectively . ​ The Company accounts for uncertain tax positions in accordance with Accounting Standards Codification 740, Income Taxes was $22,630 and $20,718, respectively. As of June 30, 2019 and December 31, 2018, approximately $171 of unrecognized tax benefits, if recognized, would impact the Company’s effective tax rate. The remaining balance, if recognized, would adjust the Company’s deferred tax assets, which are subject to valuation allowance. ​ The Company’s policy is to recognize interest and penalties related to unrecognized tax benefits in income tax expense. The expense related to interest on uncertain tax positions was immaterial during the three months and six months ended June 30, 2019 and 2018. As of June 30, 2019 and December 31, 2018, the Company had a liability of $165 and $150, respectively, related to interest and penalties for uncertain tax positions. ​ The Company is subject to taxation in the United States and various foreign jurisdictions. The material jurisdictions subject to examination by tax authorities are primarily the State of California, United States, Canada, China, and India. The Company’s federal tax returns are open by statute for tax years 1998 and forward and California tax returns are open by statute for tax years 2003 and forward and could be subject to examination by the tax authorities. The Company’s income tax returns in its international locations are open by statute for tax years 2015 and forward. ​ The Company does not provide for federal income taxes on the undistributed earnings of its foreign subsidiaries as such earnings are to be reinvested indefinitely outside the U.S.

Segment Reporting

Segment Reporting	6 Months Ended
	Jun. 30, 2019
Segment Reporting
Segment Reporting	Note 13 — Segment Reporting ​ Accounting Standard Codification 280, Segment Reporting ​ Accordingly, the Company reports as a single reportable segment—mobile games. In the case of Digital Storefronts, revenue is attributed to the geographic location where the end-user makes the purchase. The Company generates its revenue in the following geographic regions: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 2018 ​ United States of America ​ $ 73,835 ​ $ 69,115 ​ $ 146,703 ​ $ 129,931 ​ Americas, excluding the United States ​ 5,979 ​ 5,148 ​ 12,197 ​ 9,943 ​ EMEA ​ 10,902 ​ 10,212 ​ 22,430 ​ 20,204 ​ APAC ​ 4,824 ​ 5,718 ​ 10,095 ​ 11,558 ​ ​ ​ $ 95,540 ​ $ 90,193 ​ $ 191,425 ​ $ 171,636 ​ ​ The Company attributes its long-lived assets, which primarily consist of property and equipment, to a country primarily based on the physical location of the assets. Property and equipment, net of accumulated depreciation and amortization, summarized by geographic location was as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, ​ 2019 2018 United States of America ​ $ 12,305 ​ $ 12,653 ​ Rest of the World ​ 1,024 ​ 1,235 ​ ​ ​ $ 13,329 ​ $ 13,888 ​ ​

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2019
Restructuring.
Restructuring	Note 14 — Restructuring ​ No restructuring charges related to employee and lease termination costs were recorded during the three and six months ended June 30, 2019. During the three and six months ended June 30, 2018, the Company recorded $0 and $80 of restructuring charges related to lease termination costs in the Company’s Long Beach, California office. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Restructuring ​ Restructuring ​ Restructuring ​ ​ ​ Workforce Facility Total ​ Balance as of January 1, 2018 ​ $ 143 ​ $ 616 ​ $ 759 ​ Charges to operations ​ ​ 160 ​ ​ 80 ​ ​ 240 ​ Charges settled in cash ​ ​ (303) ​ ​ (402) ​ ​ (705) ​ Balance as of December 31, 2018 ​ $ - ​ $ 294 ​ $ 294 ​ Non-cash adjustments (1) ​ ​ - ​ ​ (294) ​ ​ (294) ​ Balance as of June 30, 2019 ​ $ - ​ $ - ​ $ - ​ ​ (1) Reflects reclassification of restructuring accrual to operating lease right of use assets.

The Company, Basis of Present_2

The Company, Basis of Presentation and Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2019
The Company, Basis of Presentation and Summary of Significant Accounting Policies
Principles of Consolidation and Basis of Presentation	Principles of Consolidation and Basis of Presentation ​ The accompanying unaudited condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) regarding interim financial reporting. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles in the United States (“GAAP”) for complete financial statements and should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 filed with the SEC on February 28, 2019. In the opinion of management, the accompanying unaudited condensed consolidated financial statements contain all adjustments, consisting only of normal recurring adjustments, which the Company believes are necessary for a fair statement of the Company’s financial position as of June 30, 2019 and its unaudited condensed consolidated results of operations for the three and six months ended June 30, 2019 and 2018, respectively. These unaudited condensed consolidated financial statements are not necessarily indicative of the results to be expected for the entire year. The unaudited condensed consolidated balance sheet presented as of December 31, 2018 has been derived from the audited consolidated financial statements as of that date, and the unaudited condensed consolidated balance sheet presented as of June 30, 2019 has been derived from the unaudited condensed consolidated financial statements as of that date. Certain prior year balances have been reclassified to conform to the current year presentation. Such reclassifications did not materially affect revenue, operating income/(loss), net income/(loss), cash flows, total assets, total liabilities or stockholders’ equity. ​ The unaudited condensed consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated.
Concentration of Credit Risk	Concentration of Credit Risk ​ Financial instruments that potentially subject the Company to a concentration of credit risk consist of cash, cash equivalents and accounts receivable. ​ The Company derives its accounts receivable from revenue earned from customers or through Digital Storefronts located in the United States and other locations outside of the United States. The Company performs ongoing credit evaluations of its customers’ and the Digital Storefronts’ financial condition and, generally, requires no collateral from its customers or the Digital Storefronts. The Company bases its allowance for doubtful accounts on management’s best estimate of the amount of probable credit losses in the Company’s existing accounts receivable. The Company reviews past due balances over a specified amount individually for collectability on a monthly basis. It reviews all other balances quarterly. The Company charges off accounts receivable balances against the allowance when it determines that the amount will not be recovered. ​ The following table summarizes the revenue from customers or aggregate purchases through Digital Storefronts in excess of 10% of the Company’s revenue: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ June 30, ​ ​ 2019 ​ 2018 ​ 2019 ​ 2018 Apple 52.6 % ​ 54.9 % ​ 52.8 % ​ 56.3 % Google 34.6 % ​ 29.9 % ​ 34.4 % ​ 29.7 % ​ At June 30, 2019, Apple Inc. (“Apple”), Google Inc. (“Google”), and Tapjoy Inc. (“Tapjoy”) accounted for 61.5%, 20.7%, and 12.1% of total accounts receivable. At December 31, 2018, Apple, Google, and Tapjoy accounted for 40.8%, 30.3%, and 21.1%, respectively, of total accounts receivable. No other customer or Digital Storefront represented more than 10% of the Company’s total accounts receivable as of these dates.
Operating Leases	Operating Leases ​ The Company determines if an arrangement is a lease at inception. Its operating lease agreements are primarily for real estate space and are included within operating lease right of use (“ROU”) assets and operating lease liabilities on the condensed consolidated balance sheets. ​ ROU assets represent the Company’s right to use an underlying asset for the lease term and operating lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets and operating lease liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As the Company’s leases do not provide an implicit rate, the Company uses its incremental borrowing rate, determined as the rate it would have incurred to borrow based on its credit quality at the inception of the lease over a similar term and in the economic environment where the leased asset is located, to calculate the present value of lease payments. ROU assets also exclude lease incentives. Many of the Company’s lease agreements include options to extend the lease, which the Company does not include in the minimum lease terms unless they are reasonably certain to be exercised. Rental expense for lease payments related to operating leases is recognized on a straight-line basis over the lease term.
Recent Accounting Pronouncements	Recent Accounting Pronouncements ​ Recently Issued Accounting Pronouncements Not Yet Adopted ​ In January 2017, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2017-04, Intangibles—Goodwill and Other (Topic 350) Simplifying the Test for Goodwill Impairment . ​ In August 2018, the FASB issued ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement. ​ In August 2018, the FASB issued ASU 2018-15, Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract

The Company, Basis of Present_3

The Company, Basis of Presentation and Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2019
The Company, Basis of Presentation and Summary of Significant Accounting Policies
Schedule of Revenue Concentration	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ June 30, ​ ​ 2019 ​ 2018 ​ 2019 ​ 2018 Apple 52.6 % ​ 54.9 % ​ 52.8 % ​ 56.3 % Google 34.6 % ​ 29.9 % ​ 34.4 % ​ 29.7 %

Net Income_(Loss) Per Share (Ta

Net Income/(Loss) Per Share (Tables)	6 Months Ended
	Jun. 30, 2019
Net Income/(Loss) Per Share
Computation of Net Loss Per Share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ ​ 2019 2018 ​ 2019 2018 Net income/(loss) ​ $ 2,507 ​ $ (4,415) ​ $ 3,170 ​ $ (11,621) ​ Shares used to compute net income/(loss) per share: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted average shares used to compute basic net income/(loss) per share ​ ​ 145,451 ​ ​ 140,534 ​ ​ 144,951 ​ ​ 139,821 ​ Dilutive potential common shares ​ 14,231 ​ — ​ 14,605 ​ — ​ Weighted average shares used to compute diluted net income/(loss) per share ​ 159,682 ​ 140,534 ​ 159,556 ​ 139,821 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Basic net income/(loss) per share ​ $ 0.02 ​ $ (0.03) ​ ​ 0.02 ​ ​ (0.08) ​ Diluted net income/(loss) per share ​ $ 0.02 ​ $ (0.03) ​ $ 0.02 ​ $ (0.08) ​
Schedule of Anti-Dilutive Securities Excluded from Computation of Diluted Net Loss Per Share	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 ​ 2018 Warrants to purchase common stock ​ ​ — ​ ​ 3,267 ​ ​ — ​ ​ 3,267 Options to purchase common stock ​ ​ 415 ​ ​ 19,574 ​ ​ 313 ​ ​ 18,870 RSUs ​ ​ 7 ​ ​ 4,451 ​ ​ 4 ​ ​ 4,956 ​ ​ ​ 422 ​ ​ 27,292 ​ ​ 317 ​ ​ 27,093

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	6 Months Ended
	Jun. 30, 2019
Revenue from Contracts with Customers
Summary of Revenue from Contracts with Customers	​ The following table summarizes revenue from contracts with customers for the three and six months ended June 30, 2019 and June 30, 2018: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ ​ June 30, ​ ​ ​ 2019 ​ 2018 ​ ​ 2019 ​ ​ 2018 Micro-Transactions (over-time revenue recognition) ​ $ 82,659 $ 77,078 ​ $ 166,203 ​ $ 149,004 Advertisements and offers (point-in-time revenue recognition) ​ 12,864 13,023 ​ ​ 25,194 ​ 22,380 Other (point-in-time revenue recognition) ​ ​ 17 ​ 92 ​ ​ 28 ​ ​ 252 Total Revenue ​ $ 95,540 $ 90,193 ​ $ 191,425 ​ $ 171,636
Information on Receivables, contract assets and contract liabilities	​ ​ ​ ​ ​ ​ ​ ​ June 30, 2019 ​ December 31, 2018 Receivables, which are included in accounts receivable, net $ 40,184 ​ $ 27,325 Contract assets ​ - ​ ​ - Contract liabilities, which are included in deferred revenue $ 88,820 ​ $ 85,736

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2019
Fair Value Measurements
Schedule of Assets and Liabilities Presented at Fair Value	The Company’s financial assets as of June 30, 2019 are presented below at fair value and were classified within the fair value hierarchy as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 June 30, 2019 Financial Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 99,498 ​ $ — ​ $ — ​ $ 99,498 ​ Other investments ​ ​ — ​ ​ — ​ ​ 1,565 ​ ​ 1,565 ​ Total financial assets ​ $ 99,498 ​ $ — ​ $ 1,565 ​ $ 101,063 ​ ​ The Company’s financial assets as of December 31, 2018 are presented below at fair value and were classified within the fair value hierarchy as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Level 1 Level 2 Level 3 December 31, 2018 Financial Assets ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Cash and cash equivalents ​ $ 97,834 ​ $ — ​ $ — ​ $ 97,834 Restricted cash ​ ​ 110 ​ ​ — ​ ​ — ​ ​ 110 Other investments ​ ​ — ​ ​ — ​ ​ 1,410 ​ ​ 1,410 Total financial assets ​ $ 97,944 ​ $ — ​ $ 1,410 ​ $ 99,354

Cash, Cash Equivalents and Re_2

Cash, Cash Equivalents and Restricted Cash (Tables)	6 Months Ended
	Jun. 30, 2019
Cash, Cash Equivalents and Restricted Cash
Reconciliation of cash, cash equivalents and restricted cash	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ ​ June 30, ​ 2019 ​ 2018 Cash and cash equivalents at beginning of period ​ $ 97,834 ​ $ 63,764 Restricted cash at beginning of the period ​ 110 ​ 602 Cash, cash equivalents and restricted cash at beginning of period ​ $ 97,944 ​ $ 64,366 Cash and cash equivalents at end of period ​ ​ 99,498 ​ ​ 61,518 Restricted cash at end of the period ​ ​ — ​ ​ 110 Cash, cash equivalents and restricted cash at end of period ​ $ 99,498 ​ $ 61,628 ​

Balance Sheet Components (Table

Balance Sheet Components (Tables)	6 Months Ended
	Jun. 30, 2019
Balance Sheet Components
Schedule of Components of Accounts Receivable, net	Accounts Receivable, net ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, ​ 2019 2018 Accounts receivable ​ $ 40,184 ​ $ 27,325 ​ Less: Allowance for doubtful accounts ​ — ​ — ​ ​ ​ $ 40,184 ​ $ 27,325 ​

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2019
Goodwill and Intangible Assets
Schedule of Carrying Amounts and Accumulated Amortization of Acquired Intangible Assets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, 2019 ​ December 31, 2018 ​ Estimated Gross Accumulated Net Gross Accumulated Net ​ ​ Useful ​ Carrying ​ Amortization ​ Carrying ​ Carrying ​ Amortization ​ Carrying ​ ​ Life ​ Value ​ Expense ​ Value ​ Value ​ Expense ​ Value Intangible assets amortized to cost of revenue: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Titles, content and technology 3 - 5 yrs ​ $ 21,117 ​ $ (14,281) ​ $ 6,836 ​ $ 21,117 ​ $ (12,203) ​ $ 8,914 ​ Carrier contract and related relationships 5 yrs ​ 700 ​ ​ (700) ​ ​ — ​ 700 ​ ​ (648) ​ ​ 52 ​ Trademarks 7 yrs ​ 5,000 ​ ​ (5,000) ​ ​ — ​ 5,000 ​ ​ (4,821) ​ ​ 179 ​ ​ ​ ​ ​ $ 26,817 ​ $ (19,981) ​ $ 6,836 ​ $ 26,817 ​ $ (17,672) ​ $ 9,145 ​
Schedule of Expected Amortization Related to Intangible Assets	​ ​ ​ ​ ​ ​ Amortization ​ ​ to Be Included in ​ ​ Cost of Year Ending December 31, Revenue 2019 (remaining 6 months) ​ $ 2,078 2020 ​ 3,258 2021 ​ 1,500 Total intangible assets ​ $ 6,836

Leases (Tables)

Leases (Tables)	6 Months Ended
	Jun. 30, 2019
Leases
Material impact on the Company's condensed consolidated balance sheets	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ As Previously Reported December 31, 2018 ​ New Lease Standard Adjustment ​ As Adjusted January 1, 2019 Operating lease right of use assets ​ $ — ​ ​ 28,345 ​ $ 28,345 Short-term operating lease liabilities ​ ​ — ​ ​ 3,732 ​ ​ 3,732 Long-term operating lease liabilities ​ ​ — ​ ​ 30,197 ​ ​ 30,197 Deferred rent payable* ​ $ 5,284 ​ ​ (5,284) ​ $ — ​ * As of December 31, 2018, $122 and $5,162 of Deferred rent payable is included within the Accounts payable and Other long-term liabilities line items on the condensed consolidated balance sheet, respectively.
Schedule of future minimum lease payments	​ ​ ​ ​ ​ ​ ​ Operating Year Ending December 31, Leases 2019 (remaining 6 months) ​ $ 3,116 2020 ​ 5,686 2021 ​ 5,316 2022 ​ ​ 5,191 2023 ​ ​ 5,177 Thereafter ​ ​ 21,810 Total lease payments ​ $ 46,296 Less: imputed interest ​ ​ (11,226) Total ​ $ 35,070 ​ ​ ​ ​ ​ ​ ​ Minimum ​ ​ Operating ​ ​ Lease Year Ending December 31, Payments 2019 ​ $ 5,486 ​ 2020 ​ 5,219 ​ 2021 ​ 4,609 ​ 2022 ​ 4,637 ​ 2023 and thereafter ​ 24,894 ​ ​ ​ $ 44,845 ​
Supplemental Information Operating Cash Flows from Operating Leases	​ ​ ​ ​ ​ ​ ​ Six Months Ended ​ June 30, 2019 Cash paid for amounts included in the measurement of lease liabilities: ​ ​ ​ Operating cash flows from operating leases (1) ​ $ 2,853

Commitments and Contingencies (

Commitments and Contingencies (Tables)	6 Months Ended
	Jun. 30, 2019
Commitments and Contingencies
Schedule of Future Minimum Guaranteed Royalty Commitments	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Future ​ ​ Minimum ​ ​ Guarantee ​ Commitments 2019 (remaining 6 months) ​ $ 260 2020 ​ 6,900 2021 ​ ​ 6,000 2022 ​ ​ 3,000 2023 and thereafter ​ ​ 6,000 ​ ​ $ 22,160

Stock Option and Other Benefi_2

Stock Option and Other Benefit Plans (Tables)	6 Months Ended
	Jun. 30, 2019
Summary of Company's RSU Activity	A summary of the Company’s RSU activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Units ​ Grant Date ​ Contractual ​ ​ Intrinsic ​ Outstanding Fair Value ​ Term (Years) ​ ​ Value Awarded and unvested, December 31, 2018 3,021 ​ $ 3.01 ​ ​ ​ ​ ​ Granted 878 ​ $ 8.82 ​ ​ ​ ​ ​ Vested (1,013) ​ $ 3.53 ​ ​ ​ ​ ​ Forfeited (132) ​ $ 2.77 ​ ​ ​ ​ ​ Awarded and unvested, June 30, 2019 2,754 ​ $ 4.69 ​ 1.16 ​ $ 19,745
Schedule of Assumptions Used to Estimate Fair Value of Options	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Performance Stock Options ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ 2019 ​ 2018 ​ 2019 ​ 2018 Dividend yield — % — % — % — % Risk-free interest rate — % — % — % 2.36 % Expected volatility — % — % — % 62.6 % Expected term (years) — ​ — ​ — ​ 5.97 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Stock Options ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ 2019 ​ 2018 ​ 2019 ​ 2018 Dividend yield — % — % — % — % Risk-free interest rate 2.07 % 2.71 % 2.15 % 2.49 % Expected volatility 56.1 % 57.9 % 56.1 % 58.4 % Expected term (years) 4.00 ​ 4.00 ​ 4.00 ​ 4.00 ​
Schedule of Stock-Based Compensation Expense by Line Item	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 2018 ​ Research and development ​ $ 1,128 ​ $ 2,728 ​ $ 5,074 ​ $ 5,927 ​ Sales and marketing ​ 55 ​ 609 ​ 881 ​ 1,262 ​ General and administrative ​ 852 ​ 2,006 ​ 2,887 ​ 4,462 ​ Total stock-based compensation expense ​ $ 2,035 ​ $ 5,343 ​ $ 8,842 ​ $ 11,651 ​
Schedule of compensation expense related to unvested awards	​ ​ ​ ​ ​ ​ Unrecognized ​ ​ Expense for ​ ​ Awards Stock options ​ $ 15,217 RSUs ​ ​ 11,667 PSUs (1) ​ ​ 632 PSOs (1) ​ ​ 443 Total unrecognized compensation expense ​ $ 27,959 ​ (1) The unrecognized compensation for PSOs and PSUs vesting in FY2021 and FY2022 is excluded in the table above as the Company does not have a reasonable basis upon which to estimate the vesting probability of such awards in those future periods.
PSUs
Summary of Company's RSU Activity	A summary of the Company’s PSU activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Units ​ Grant Date ​ Contractual ​ ​ Intrinsic ​ Outstanding Fair Value ​ Term (Years) ​ ​ Value Awarded and unvested, December 31, 2018 ​ 3,530 ​ $ 5.45 ​ ​ ​ ​ ​ Granted ​ 327 ​ $ 9.16 ​ ​ ​ ​ ​ Vested ​ (538) ​ $ 4.27 ​ ​ ​ ​ ​ Forfeited ​ (179) ​ $ 6.03 ​ ​ ​ ​ ​ Awarded and unvested, June 30, 2019 ​ 3,140 ​ $ 6.01 ​ 1.32 ​ $ 22,544 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PSUs expected to vest at June 30, 2019 ​ 414 ​ $ 4.45 ​ 0.45 ​ $ 2,969
Stock options
Summary of Stock Option Activity	The following table summarizes the Company’s stock option activity for the six months ended June 30, 2019: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options Outstanding ​ ​ ​ ​ ​ ​ ​ Weighted Weighted ​ ​ ​ ​ Number ​ Average ​ Average Remaining ​ Aggregate ​ ​ of ​ Exercise ​ Contractual ​ Intrinsic ​ ​ Shares ​ Price ​ Term (Years) ​ Value Balances at December 31, 2018 18,491 $ 3.39 ​ ​ ​ ​ ​ Options granted 538 ​ ​ 8.74 ​ ​ ​ ​ ​ ​ Options canceled (592) ​ ​ 5.42 ​ ​ ​ ​ ​ ​ Options exercised (652) ​ ​ 2.89 ​ ​ ​ ​ ​ ​ Balances at June 30, 2019 17,785 ​ $ 3.50 7.53 ​ $ 65,871 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Options exercisable at June 30, 2019 8,607 ​ $ 3.02 6.81 ​ $ 35,780 ​
PSOs
Summary of Stock Option Activity	A summary of the Company’s PSO activity for the six months ended June 30, 2019 is as follows: ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Weighted ​ Weighted ​ ​ ​ ​ ​ Number of ​ Average ​ Average Remaining ​ ​ Aggregate ​ ​ Share ​ Exercise ​ Contractual ​ ​ Intrinsic ​ Outstanding Price ​ Term (Years) ​ ​ Value Balance as of December 31, 2018 ​ 6,756 ​ $ 4.51 ​ ​ ​ ​ ​ Exercised ​ (173) ​ $ 3.59 ​ ​ ​ ​ ​ Balance as of June 30, 2019 ​ 6,583 ​ $ 4.54 ​ 8.65 ​ $ 17,393 ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ PSOs expected to vest at June 30, 2019 ​ 364 ​ $ 3.60 ​ 8.35 ​ $ 1,312 PSO exercisable at June 30, 2019 ​ 3,339 ​ $ 3.60 ​ 8.30 ​ $ 11,961 ​ ​

Segment Reporting (Tables)

Segment Reporting (Tables)	6 Months Ended
	Jun. 30, 2019
Segment Reporting
Schedule of Revenues by Geographic Region	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Three Months Ended ​ Six Months Ended ​ ​ ​ June 30, ​ June 30, ​ ​ 2019 2018 ​ 2019 2018 ​ United States of America ​ $ 73,835 ​ $ 69,115 ​ $ 146,703 ​ $ 129,931 ​ Americas, excluding the United States ​ 5,979 ​ 5,148 ​ 12,197 ​ 9,943 ​ EMEA ​ 10,902 ​ 10,212 ​ 22,430 ​ 20,204 ​ APAC ​ 4,824 ​ 5,718 ​ 10,095 ​ 11,558 ​ ​ ​ $ 95,540 ​ $ 90,193 ​ $ 191,425 ​ $ 171,636 ​
Schedule of Long-Lived Assets by Geographic Location	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ June 30, December 31, ​ 2019 2018 United States of America ​ $ 12,305 ​ $ 12,653 ​ Rest of the World ​ 1,024 ​ 1,235 ​ ​ ​ $ 13,329 ​ $ 13,888 ​

Restructuring (Tables)

Restructuring (Tables)	6 Months Ended
	Jun. 30, 2019
Restructuring.
Summary of Restructuring Reserve Activity	​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ Restructuring ​ Restructuring ​ Restructuring ​ ​ ​ Workforce Facility Total ​ Balance as of January 1, 2018 ​ $ 143 ​ $ 616 ​ $ 759 ​ Charges to operations ​ ​ 160 ​ ​ 80 ​ ​ 240 ​ Charges settled in cash ​ ​ (303) ​ ​ (402) ​ ​ (705) ​ Balance as of December 31, 2018 ​ $ - ​ $ 294 ​ $ 294 ​ Non-cash adjustments (1) ​ ​ - ​ ​ (294) ​ ​ (294) ​ Balance as of June 30, 2019 ​ $ - ​ $ - ​ $ - ​

The Company, Basis of Present_4

The Company, Basis of Presentation and Summary of Significant Accounting Policies - Concentration Risks (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Revenues from customers | Apple
Concentration Risk [Line Items]
Concentration risk percentage from customers	52.6	54.9	52.8	56.3
Revenues from customers | Google
Concentration Risk [Line Items]
Concentration risk percentage from customers	34.6	29.9	34.4	29.7
Accounts Receivable | Customer Concentration Risk | Apple
Concentration Risk [Line Items]
Concentration risk percentage from customers			61.5		40.8
Accounts Receivable | Customer Concentration Risk | Google
Concentration Risk [Line Items]
Concentration risk percentage from customers			20.7		30.3
Accounts Receivable | Customer Concentration Risk | Tapjoy
Concentration Risk [Line Items]
Concentration risk percentage from customers			12.1		21.1

Net Income_(Loss) Per Share - B

Net Income/(Loss) Per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Earnings Per Share, Basic and Diluted [Abstract]
Net income/(loss)	$ 2,507	$ (4,415)	$ 3,170	$ (11,621)
Shares used to compute net income/(loss) per share:
Weighted average shares used to compute basic net income/(loss) per share	145,451	140,534	144,951	139,821
Dilutive potential common shares	14,231		14,605
Weighted average shares used to compute diluted net income/(loss) per share	159,682	140,534	159,556	139,821
Basic net income/(loss) per share	$ 0.02	$ (0.03)	$ 0.02	$ (0.08)
Diluted net income/(loss) per share	$ 0.02	$ (0.03)	$ 0.02	$ (0.08)

Net Income_(Loss) Per Share - A

Net Income/(Loss) Per Share - Antidilutive Shares (Details) - shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share	422	27,292	317	27,093
Warrants to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share		3,267		3,267
Stock options
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share	415	19,574	313	18,870
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share	7	4,451	4	4,956
PSOs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share			3,244	4,564
Performance-based stock units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Anti dilutive securities excluded from computation of diluted net loss per share			3,047	1,556

Revenue from Contracts with C_3

Revenue from Contracts with Customers - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Total Revenue	$ 95,540	$ 90,193	$ 191,425	$ 171,636
Deferred revenue	88,820		88,820		$ 85,736	$ 67,788
Micro-Transactions | Over-time revenue recognition
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	82,659	77,078	166,203	149,004
Advertisements and offers | point-in-time revenue recognition
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12,864	13,023	25,194	22,380
Other | point-in-time revenue recognition
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 17	$ 92	$ 28	$ 252

Revenue from Contracts with C_4

Revenue from Contracts with Customers - Contract Balances (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Dec. 31, 2017
Contract Balances
Receivables, which are included in accounts receivable, net	$ 40,184	$ 27,325
Contract assets	0	0
Contract liabilities, which are included in deferred revenue	$ 88,820	$ 85,736	$ 67,788

Revenue from Contracts with C_5

Revenue from Contracts with Customers - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Contract assets	$ 0		$ 0		$ 0
Contract liabilities, which are included in deferred revenue	88,820		88,820		$ 85,736	$ 67,788
Deferred revenue earned and recognized	$ 21,914	$ 15,622	84,612	$ 66,928
Revenue recognized relating to performance obligations satisfied in prior periods			$ 0	$ 0
Revenue, Remaining Performance Obligation, Optional Exemption, Performance Obligation [true false]		true
Maximum
Estimated weighted average useful life of a paying user			8 months
Minimum
Estimated weighted average useful life of a paying user			4 months

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	$ 99,498	$ 97,834
Restricted cash		110
Other Investments	1,565	1,410
Total financial assets	101,063	99,354
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and cash equivalents	99,498	97,834
Restricted cash		110
Total financial assets	99,498	97,944
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Other Investments	1,565	1,410
Total financial assets	$ 1,565	$ 1,410

Cash, Cash Equivalents and Re_3

Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018
Cash, Cash Equivalents and Restricted Cash
Cash and cash equivalents at beginning of period	$ 97,834	$ 61,518	$ 63,764
Restricted cash at beginning of the period	110	110	602
Cash, cash equivalents and restricted cash at beginning of period	97,944	61,628	64,366
Cash and cash equivalents at end of period	99,498	97,834	61,518
Restricted cash at end of the period		110	110
Cash, cash equivalents and restricted cash at end of period	$ 99,498	$ 97,944	$ 61,628

Balance Sheet Components - Acco

Balance Sheet Components - Accounts Receivable (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Balance Sheet Components
Accounts receivable	$ 40,184	$ 27,325
Accounts receivable, net	$ 40,184	$ 27,325

Goodwill And Intangible Asset_2

Goodwill And Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets
Gross Carrying Value	$ 26,817	$ 26,817
Accumulated Amortization Expense	(19,981)	(17,672)
Total intangible assets	6,836	9,145
Titles, content and technology
Finite-Lived Intangible Assets
Gross Carrying Value	21,117	21,117
Accumulated Amortization Expense	(14,281)	(12,203)
Total intangible assets	$ 6,836	8,914
Titles, content and technology | Minimum
Finite-Lived Intangible Assets
Estimated Useful Life	3 years
Titles, content and technology | Maximum
Finite-Lived Intangible Assets
Estimated Useful Life	5 years
Carrier contract and related relationships
Finite-Lived Intangible Assets
Estimated Useful Life	5 years
Gross Carrying Value	$ 700	700
Accumulated Amortization Expense	$ (700)	(648)
Total intangible assets		52
Trademarks
Finite-Lived Intangible Assets
Estimated Useful Life	7 years
Gross Carrying Value	$ 5,000	5,000
Accumulated Amortization Expense	$ (5,000)	(4,821)
Total intangible assets		$ 179

Goodwill And Intangible Asset_3

Goodwill And Intangible Assets - Future Amortization (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Cost of Goods and Services Sold, Depreciation and Amortization [Abstract]
Amortization of intangible assets	$ 1,056	$ 1,468	$ 2,308	$ 2,935
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2019 (remaining 6 months)	2,078		2,078
2020	3,258		3,258
2021	1,500		1,500
Total intangible assets	6,836		6,836
Goodwill	$ 116,227		116,227		$ 116,227
Changes in Goodwill during the year			$ 0

Leases - Narrative (Details)

Leases - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Lease terms
Lease, Practical Expedients, Package [true false]			true
Lessee, Operating Lease, Existence of Option to Extend [true false]			true
Longest extension option	6 years		6 years
Weighted-average remaining non-cancelable lease term	8 years 7 days		8 years 7 days
Weighted-average discount rate	6.90%		6.90%
Rent expense	$ 653	$ 1,444	$ 2,004	$ 2,889
ASC 840, Leases, total commitment for non-cancelable operating leases					$ 44,845
Maximum
Lease terms
Operating leases, remaining lease terms			8 years 5 months 1 day
Minimum
Lease terms
Operating leases, remaining lease terms			9 months

Leases - Material impact on Bal

Leases - Material impact on Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating lease right of use assets	$ 29,650	$ 28,345
Short-term operating lease liabilities	3,796	3,732
Long-term operating lease liabilities	$ 31,274	30,197
Accounts payable
Deferred rent payable			$ 122
Other long-term liabilities
Deferred rent payable			5,162
As Previously Reported
Deferred rent payable			$ 5,284
New Lease Standard Adjustment
Operating lease right of use assets		28,345
Short-term operating lease liabilities		3,732
Long-term operating lease liabilities		30,197
Deferred rent payable		$ (5,284)

Leases - Lease Modifications (D

Leases - Lease Modifications (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2019USD ($)ft²
Square feet | ft²		24,500
Term	89 months	89 months
Option to extend		true
Option to extend, additional term	5 years	5 years
Additional period		The Foster City Lease expires 89 months after the Commencement Date with an option to extend the lease for an additional 5-year period.
Future minimum rental payments	$ 12,565	$ 12,565
Toronto and Burlingame lease extension
Aggregate adjustment to ROU asset	$ 2,765

Leases - Future Minimum Lease P

Leases - Future Minimum Lease Payments under Noncancelable Leases (Details) $ in Thousands	Jun. 30, 2019USD ($)
Leases
2019 (remaining 6 months)	$ 3,116
2020	5,686
2021	5,316
2022	5,191
2023	5,177
Thereafter	21,810
Total lease payments	46,296
Less imputed interest	(11,226)
Total	$ 35,070

Leases - Previous Lease Account

Leases - Previous Lease Accounting Standard, ASC 840, Leases, Total commitment for Non-cancelable Operating Leases (Details) $ in Thousands	Dec. 31, 2018USD ($)
ASC 840, Leases, Minimum Operating Lease Payments
2019	$ 5,486
2020	5,219
2021	4,609
2022	4,637
2023 and thereafter	24,894
Total	$ 44,845

Leases - Supplemental Informati

Leases - Supplemental Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 2,853

Commitments and Contingencies -

Commitments and Contingencies - Minimum Guaranteed Royalties (Details) $ in Thousands	Jun. 30, 2019USD ($)
Guaranteed royalty commitments
Future unpaid minimum guaranteed royalty commitments
2019 (remaining 6 months)	$ 260
2020	6,900
2021	6,000
2022	3,000
2023 and thereafter	6,000
Total future unpaid minimum guaranteed royalty commitments	22,160
Agreements With Various Licensors | Current and long-term liabilities
Future unpaid minimum guaranteed royalty commitments
Total future unpaid minimum guaranteed royalty commitments	22,141
Agreements With Various Licensors | Current and long-term assets
Future unpaid minimum guaranteed royalty commitments
Recoupment of earned royalties	$ 22,141

Commitments and Contingencies_2

Commitments and Contingencies - Other Commitments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Indemnification Agreement | Digital Storefronts
Indemnification Agreements [Abstract]
Indemnification liability recorded	$ 0	$ 0

Stockholders' Equity - Warrants

Stockholders' Equity - Warrants (Details) - Warrants to purchase common stock - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Class of Warrant or Right [Line Items]
Number of shares outstanding under warrant	1,600		1,600		1,600
Weighted average exercise price (per share)	$ 4.61		$ 4.61		$ 4.61
Average contractual term			5 years 5 months 8 days		5 years 5 months 8 days
Recognized expense with respect to warrants	$ 0	$ 798	$ 0	$ 1,046

Stock Option And Other Benefi_3

Stock Option And Other Benefit Plans (Details) - USD ($) shares in Thousands, $ in Thousands	1 Months Ended			3 Months Ended		6 Months Ended
	Apr. 30, 2019	Apr. 30, 2018	Apr. 30, 2017	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation				$ 2,035	$ 5,343	$ 8,842	$ 11,651
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term						6 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term						10 years
Stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted, number of shares						538
PSOs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Contractual term						10 years
2007 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance, increased	4,600	10,000
2007 Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock authorized for issuance, increased			4,000
2018 Equity Inducement Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, reserved for future issuance		400

Stock Option And Other Benefi_4

Stock Option And Other Benefit Plans - RSU, PSU and PSO Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2019USD ($)$ / sharesshares
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded and unvested, Number of Units Outstanding, beginning balance | shares	3,021
Granted, Number of Units Outstanding | shares	878
Vested, Number of Units Outstanding | shares	(1,013)
Forfeited, Number of Units Outstanding | shares	(132)
Awarded and unvested, Number of Units Outstanding, ending balance | shares	2,754
Awarded and unvested, Weighted Average Grant Date Fair Value, beginning balance | $ / shares	$ 3.01
Granted, Weighted Average Grant Date Fair Value | $ / shares	8.82
Vested, Weighted Average Grant Date Fair Value | $ / shares	3.53
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	2.77
Awarded and unvested, Weighted Average Grant Date Fair Value, ending balance | $ / shares	$ 4.69
Awarded and unvested, Weighted Average Remaining Contractual Term (Years)	1 year 1 month 28 days
Aggregate Intrinsic Value | $	$ 19,745
PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded and unvested, Number of Units Outstanding, beginning balance | shares	3,530
Granted, Number of Units Outstanding | shares	327
Vested, Number of Units Outstanding | shares	(538)
Forfeited, Number of Units Outstanding | shares	(179)
Awarded and unvested, Number of Units Outstanding, ending balance | shares	3,140
Expected to vest, Number of Units Outstanding | shares	414
Awarded and unvested, Weighted Average Grant Date Fair Value, beginning balance | $ / shares	$ 5.45
Granted, Weighted Average Grant Date Fair Value | $ / shares	9.16
Vested, Weighted Average Grant Date Fair Value | $ / shares	4.27
Forfeited, Weighted Average Grant Date Fair Value | $ / shares	6.03
Awarded and unvested, Weighted Average Grant Date Fair Value, ending balance | $ / shares	6.01
Expected to vest, Weighted Average Grant Date Fair Value | $ / shares	$ 4.45
Awarded and unvested, Weighted Average Remaining Contractual Term (Years)	1 year 3 months 25 days
Expected to vest, Weighted Average Remaining Contractual Term (Years)	5 months 12 days
Aggregate Intrinsic Value | $	$ 22,544
Expected to vest, Aggregate Intrinsic Value | $	$ 2,969

Stock Option And Other Benefi_5

Stock Option And Other Benefit Plans - Stock Option Activity (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 28, 2019
Quoted closing price of Company's common stock			$ 7.18
Cash proceed from option exercise, net	$ 860	$ 2,456
PSOs
Number of shares, beginning balances	6,756
Options exercised, number of shares	(173)
Number of shares, ending balances	6,583
Options vested and expected to vest, number of shares	364
Options exercisable, number of shares	3,339
Weighted average exercise price, beginning balances	$ 4.51
Options granted, weighted average exercise price	3.59
Weighted average exercise price, ending balances	4.54
Options vested and expected to vest, weighted average exercise price	3.60
Options exercisable, weighted average exercise price	$ 3.60
Weighted average remaining contractual term, options outstanding	8 years 7 months 24 days
Weighted average contractual term, options expected to vest	8 years 4 months 6 days
Weighted average remaining contractual term, Options exercisable	8 years 3 months 18 days
Aggregate intrinsic value, options outstanding	$ 17,393
Aggregate intrinsic value, Options vested and expected to vest	1,312
Aggregate intrinsic value, options exercisable	$ 11,961
Stock options
Number of shares, beginning balances	18,491
Options granted, number of shares	538
Options canceled, number of shares	(592)
Options exercised, number of shares	(652)
Number of shares, ending balances	17,785
Options exercisable, number of shares	8,607
Weighted average exercise price, beginning balances	$ 3.39
Options granted, weighted average exercise price	8.74
Options canceled, weighted average exercise price	5.42
Options exercised, weighted average exercise price	2.89
Weighted average exercise price, ending balances	3.50
Options exercisable, weighted average exercise price	$ 3.02
Weighted average remaining contractual term, options outstanding	7 years 6 months 10 days
Weighted average remaining contractual term, Options exercisable	6 years 9 months 21 days
Aggregate intrinsic value, options outstanding	$ 65,871
Aggregate intrinsic value, options exercisable	$ 35,780

Stock Option And Other Benefi_6

Stock Option And Other Benefit Plans - Weighted Average Assumptions (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Stock Based Compensation Additional Details
Weighted-average fair value of stock options granted			$ 3.94	$ 1.92
Minimum
Stock Based Compensation Additional Details
Contractual term			6 years
Maximum
Stock Based Compensation Additional Details
Contractual term			10 years
PSOs
Black-Sholes Valuation Assumptions
Dividend yield	0.00%	0.00%	0.00%	0.00%
Risk-free interest rate				2.36%
Expected volatility				62.60%
Expected term (years)				5 years 11 months 19 days
Stock Based Compensation Additional Details
Contractual term			10 years
Stock options
Black-Sholes Valuation Assumptions
Dividend yield	0.00%	0.00%	0.00%	0.00%
Risk-free interest rate	2.07%	2.71%	2.15%	2.49%
Expected volatility	56.10%	57.90%	56.10%	58.40%
Expected term (years)	4 years	4 years	4 years	4 years

Stock Option And Other Benefi_7

Stock Option And Other Benefit Plans - Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	$ 2,035	$ 5,343	$ 8,842	$ 11,651
Reversal of stock based compensation expense	2,526		2,526
Total compensation expense related to unvested awards not yet recognized	27,959		27,959
Research and development
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	1,128	2,728	5,074	5,927
Sales and marketing
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	55	609	881	1,262
General and administrative
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total stock-based compensation expense	852	$ 2,006	2,887	$ 4,462
Stock options
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation expense related to unvested awards not yet recognized	15,217		$ 15,217
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Vesting period			4 years
Vesting percentage on or around the one-year anniversary			25.00%
Total compensation expense related to unvested awards not yet recognized	11,667		$ 11,667
Unrecognized compensation expense recognized over weighted average period			2 years 3 months
RSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Unrecognized compensation expense recognized over weighted average period			2 years 29 days
PSOs
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation expense related to unvested awards not yet recognized	443		$ 443
PSOs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Unrecognized compensation expense recognized over weighted average period			7 months 17 days
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Total compensation expense related to unvested awards not yet recognized	$ 632		$ 632
PSUs | Maximum
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Unrecognized compensation expense recognized over weighted average period			5 months 12 days

Income Taxes - (Details)

Income Taxes - (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Income Taxes
Income tax expense (benefit)	$ 0	$ 207	$ 178	$ 382
Unrecognized tax benefits	22,630		22,630		$ 20,718
Unrecognized tax benefits, if recognized, would impact effective tax rate	171		171		171
Liability related to interest and penalties for uncertain tax positions	$ 165		$ 165		$ 150

Segment Reporting - Revenues (D

Segment Reporting - Revenues (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019USD ($)	Jun. 30, 2018USD ($)	Jun. 30, 2019USD ($)segment	Jun. 30, 2018USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items]
Number of Operating Segments | segment			1
Number of Reporting Units | segment			1
Revenues	$ 95,540	$ 90,193	$ 191,425	$ 171,636
United States of America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	73,835	69,115	146,703	129,931
Americas, excluding the United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,979	5,148	12,197	9,943
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	10,902	10,212	22,430	20,204
APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 4,824	$ 5,718	$ 10,095	$ 11,558

Segment Reporting - PPE (Detail

Segment Reporting - PPE (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 13,329	$ 13,888
United States of America
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net of accumulated depreciation and amortization	12,305	12,653
Rest of the World
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net of accumulated depreciation and amortization	$ 1,024	$ 1,235

Restructuring (Details)

Restructuring (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 294	$ 759	$ 759
Charges to operations	$ 0	$ 0	0	80	240
Non-cash charges/adjustments			(294)
Charges settled in cash					(705)
Ending Balance					294
Restructuring Workforce
Restructuring Reserve [Roll Forward]
Beginning Balance				143	143
Charges to operations					160
Charges settled in cash					(303)
Restructuring Facility
Restructuring Reserve [Roll Forward]
Beginning Balance			294	$ 616	616
Charges to operations					80
Non-cash charges/adjustments			$ (294)
Charges settled in cash					(402)
Ending Balance					$ 294