Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net loss	$ (11,637)	$ (7,179)	$ (12,155)
Other comprehensive income (loss), net of tax
Foreign currency translation gain (loss)	84	(886)	(3,265)
Foreign currency translation loss realized upon divestiture of subsidiary	0	2,180	0
Other comprehensive income (loss):	84	1,294	(3,265)
Total comprehensive loss	$ (11,553)	$ (5,885)	$ (15,420)