Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (945)	$ (1,753)	$ (2,234)	$ (1,969)
Other comprehensive income (loss):
Foreign currency translation adjustments	(43)	(594)	61	(178)
Unrealized losses from marketable securities, net of tax	0	(2)	0	(3)
Total other comprehensive income	(43)	(596)	61	(181)
Comprehensive income (loss)	$ (988)	$ (2,349)	$ (2,173)	$ (2,150)