CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (8,724)	$ (4,802)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	147	(304)
Other comprehensive income (loss)	147	(304)
Comprehensive loss	$ (8,577)	$ (5,106)