Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net (loss) income	$ (7,517)	$ 2,253	$ 41
Unrealized (loss) gain on marketable securities	(1)	(3)	8
Foreign currency translation adjustment	(9,288)	(4,207)	(3,953)
Unrealized gain on derivative instruments	80	57	37
Other comprehensive loss, net of tax (1)	(9,209)	(4,153)	(3,908)
Total comprehensive loss	$ (16,726)	$ (1,900)	$ (3,867)