Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 269	$ (18,776)	$ (26,983)
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(342)	(19)	211
Comprehensive loss	(73)	(18,795)	(26,772)
Comprehensive income attributable to non-controlling interest	1,544	599	269
Comprehensive loss attributable to common stockholders	$ (1,617)	$ (19,394)	$ (27,041)