Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (9,007)	$ (9,366)	$ 2,227
Other comprehensive income (loss):
Foreign currency translation adjustments	(238)	(717)	99
Comprehensive income (loss) attributable to common stockholders	$ (9,245)	$ (10,083)	$ 2,326