CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (9,818)	$ (782)	$ (23,161)	$ (21,721)
Other comprehensive income (loss):
Foreign currency translation adjustments	(67)	(47)	(50)	(2)
Comprehensive loss	$ (9,885)	$ (829)	$ (23,211)	$ (21,723)