Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net loss	$ (5,895)	$ (9,628)	$ (19,039)	$ (26,338)
Other comprehensive gain (loss), net of taxes:
Change in cumulative translation adjustment	(6)	(89)	24	(160)
Comprehensive loss	$ (5,901)	$ (9,717)	$ (19,015)	$ (26,498)