CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net loss	$ (16,340)	$ (19,920)	$ (15,622)
Other comprehensive loss
Foreign currency translation	71	(71)	0
Comprehensive loss	$ (16,269)	$ (19,991)	$ (15,622)