Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (4,885)	$ (2,791)
Other comprehensive income (loss), net of tax (1):
Foreign currency translation adjustment	601	(676)
Unrealized gain (loss) on derivative instruments, net (2)	27	(20)
Other comprehensive income (loss), net of tax	628	(696)
Total comprehensive loss	$ (4,257)	$ (3,487)