Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net loss	$ (1,920)	$ (1,773)	$ (6,114)	$ (9,409)
Other comprehensive (loss) income:
Foreign currency translation adjustments	0	0	(3)	2
Comprehensive loss	$ (1,920)	$ (1,773)	$ (6,117)	$ (9,407)