Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock Common Class A	Common Stock Common Class B	Additional Paid In Capital	Treasury Stock Common Class A	Retained (Deficit) Earnings Adoption of accounting standards	Retained (Deficit) Earnings	Accumulated Comprehensive Income(Loss) Adoption of accounting standards	Accumulated Comprehensive Income(Loss)	Non-controlling Interest	Total
Balance at the beginning of the period at Dec. 31, 2018	$ 2	$ 2	$ 270,345	$ (59,088)		$ 19,495		$ 1,155	$ 1,488	$ 233,399
Balance at the beginning of the period (in shares) at Dec. 31, 2018	24,850	19,720
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)						(7,213)			(37)	(7,250)
Issuance of treasury shares for acquisition of Snap Media			(588)	588
Stock-based compensation			3,535							3,535
Vesting of restricted stock	$ 1			(532)						(531)
Vesting of restricted stock (in shares)	184
Repurchases of Class A common stock				(662)						(662)
Issuance of treasury shares for option exercise			(47)	154						107
Other comprehensive income (loss), net of tax								(2,164)		(2,164)
Balance at the end of the period at Sep. 30, 2019	$ 3	$ 2	273,245	(59,540)		12,229		(956)	1,451	226,434
Balance at the end of the period (in shares) at Sep. 30, 2019	25,034	19,720
Balance at the beginning of the period at Jun. 30, 2019	$ 3	$ 2	271,117	(59,573)		15,398		(647)	1,451	227,751
Balance at the beginning of the period (in shares) at Jun. 30, 2019	25,034	19,720
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)						(3,169)				(3,169)
Stock-based compensation			2,175							2,175
Repurchases of Class A common stock				(14)						(14)
Issuance of treasury shares for option exercise			(47)	47
Other comprehensive income (loss), net of tax								(309)		(309)
Balance at the end of the period at Sep. 30, 2019	$ 3	$ 2	273,245	(59,540)		12,229		(956)	1,451	226,434
Balance at the end of the period (in shares) at Sep. 30, 2019	25,034	19,720
Balance at the end of the period at Jun. 30, 2020	$ 3	$ 2	277,154	(61,031)		(35)		(2,598)	1,346	214,841
Balance at the end of the period (in shares) at Jun. 30, 2020	25,439	19,720
Balance at the beginning of the period at Dec. 31, 2019	$ 3	$ 2	274,518	(60,521)		16,075		(792)	1,384	230,669
Balance at the beginning of the period (in shares) at Dec. 31, 2019	25,202	19,720
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)						(10,813)			(118)	(10,931)
Stock-based compensation			3,951							3,951
Vesting of restricted stock				(510)						(510)
Vesting of restricted stock (in shares)	237
Other comprehensive income (loss), net of tax								(1,433)		(1,433)
Balance at the end of the period (ASU 2018-02) at Sep. 30, 2020					$ (53)		$ 53
Balance at the end of the period at Sep. 30, 2020	$ 3	$ 2	278,469	(61,031)		5,262		(2,225)	1,266	221,746
Balance at the end of the period (in shares) at Sep. 30, 2020	25,439	19,720
Balance at the beginning of the period at Jun. 30, 2020	$ 3	$ 2	277,154	(61,031)		(35)		(2,598)	1,346	214,841
Balance at the beginning of the period (in shares) at Jun. 30, 2020	25,439	19,720
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net income (loss)						5,297			(80)	5,217
Stock-based compensation			1,315							1,315
Other comprehensive income (loss), net of tax								373		373
Balance at the end of the period (ASU 2018-02) at Sep. 30, 2020					$ (53)		$ 53
Balance at the end of the period at Sep. 30, 2020	$ 3	$ 2	$ 278,469	$ (61,031)		$ 5,262		$ (2,225)	$ 1,266	$ 221,746
Balance at the end of the period (in shares) at Sep. 30, 2020	25,439	19,720