CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net (loss) income	$ (8,506)	$ (10,831)	$ (17,455)	$ (12,746)
Other comprehensive income (loss):
Foreign currency translation adjustments	(2,204)	2,939	(1,056)	4,789
Comprehensive (loss) income	$ (10,710)	$ (7,892)	$ (18,511)	$ (7,957)