CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (5,515)	$ (6,617)
Foreign currency translation adjustments related to continuing operations	190	792
Comprehensive loss	$ (5,325)	$ (5,825)