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 Earnings	Accumulated Comprehensive Income	Non-controlling Interest	Total
Balance at the beginning of the period at Dec. 31, 2017	$ 3	$ 2	$ 265,329	$ (57,303)	$ 30,401	$ 472		$ 238,904
Balance at the beginning of the period (in shares) at Dec. 31, 2017	25,171	20,801
Condensed Consolidated Statements of Changes in Stockholders' Equity
Net loss					(7,559)			(7,559)
Stock-based compensation			996					996
Repurchases of Class A common stock				(34)				(34)
Exercise of warrants	$ 0		20					20
Exercise of warrants (in shares)	2
Other comprehensive income, net of tax						1,150		1,150
Balance at the end of the period at Mar. 31, 2018	$ 3	$ 2	266,345	(57,337)	22,842	1,622		233,477
Balance at the end of the period (in shares) at Mar. 31, 2018	25,173	20,801
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 loss					(1,686)		(47)	(1,733)
Issuance of treasury shares for acquisition of Snap Media			(588)	588
Stock-based compensation			917					917
Repurchases of Class A common stock				(513)				(513)
Adoption of accounting standards | ASU 2018-02					(53)	53
Other comprehensive income, net of tax						(678)		(678)
Balance at the end of the period at Mar. 31, 2019	$ 2	$ 2	$ 270,674	$ (59,013)	$ 17,756	$ 530	$ 1,441	$ 231,392
Balance at the end of the period (in shares) at Mar. 31, 2019	24,850	19,720