CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (36,256)	$ (15,191)	$ (11,985)
Other comprehensive loss, net of tax
Foreign currency translation adjustment	(631)	(414)	(1,475)
Other comprehensive loss	(631)	(414)	(1,475)
Comprehensive loss	$ (36,887)	$ (15,605)	$ (13,460)