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	$ (10,251)	$ (14,678)	$ (27,581)
Other comprehensive loss:
Translation adjustments	(952)	(1,255)	(556)
Adjustment for fair value of hedge derivatives, net of tax	292	(67)	123
Other comprehensive loss	(660)	(1,322)	(433)
Comprehensive loss	$ (10,911)	$ (16,000)	$ (28,014)