Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net income (loss)	$ 2,510	$ (7,857)	$ (263)	$ (14,630)
Other comprehensive loss, net of tax
Foreign currency translation adjustments	(267)	(70)	(271)	(24)
Comprehensive income (loss)	2,243	(7,927)	(534)	(14,654)
Comprehensive income attributable to non-controlling interest	452	183	905	274
Comprehensive income (loss) attributable to common stockholders	$ 1,791	$ (8,110)	$ (1,439)	$ (14,928)