Consolidated Statements of Comprehensive Income and (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net loss	$ (17,325)	$ (12,589)	$ (7,266)
Other comprehensive income (loss)
Foreign currency translation adjustment	(886)	2,080	(4,150)
Comprehensive loss	$ (18,211)	$ (10,509)	$ (11,416)