CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (6,202)	$ (3,225)
Other comprehensive income (loss):
Foreign currency translation adjustment, net of taxes	41	(259)
Total comprehensive loss	$ (6,161)	$ (3,484)