Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Loss	$ (4,614)	$ (4,573)	$ (7,365)	$ (9,149)
Other comprehensive income (loss):
Foreign currency translation adjustments	287	276	(1)	(96)
Comprehensive loss	$ (4,327)	$ (4,297)	$ (7,366)	$ (9,245)