Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,801)	$ (1,581)	$ (8,617)	$ (10,801)
Other comprehensive loss:
Foreign currency translation adjustments	140	(145)	120	(417)
Comprehensive loss	$ (2,661)	$ (1,726)	$ (8,497)	$ (11,218)