Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Condensed Consolidated Statements of Comprehensive Income (Loss)
Net loss	$ (4,725)	$ (5,239)
Other comprehensive (loss) income, net of tax
Foreign currency translation adjustments	(891)	(34)
Unrealized (loss) gain on marketable securities	(60)	16
Comprehensive loss	(5,676)	(5,257)
Comprehensive loss attributable to non-controlling interest	(24)	(82)
Comprehensive loss attributable to common stockholders	$ (5,652)	$ (5,175)