Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (2,506)	$ (2,637)
Other comprehensive income:
Foreign currency translation adjustments	116	429
Unrealized gains (losses) from marketable securities, net of tax	1	(3)
Total other comprehensive income	117	426
Comprehensive loss	$ (2,389)	$ (2,211)