CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net loss	$ (43,613)	$ (78,729)	$ (47,235)
Foreign currency translation adjustment	(1,895)	(5,075)	(6,015)
Comprehensive loss	$ (45,508)	$ (83,804)	$ (53,250)