CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net loss	$ (7,113)	$ (3,945)	$ (19,826)	$ (21,866)
Other comprehensive income loss, net of tax:
Foreign currency translation adjustment	36	108	331	(224)
Other comprehensive income loss	36	108	331	(224)
Comprehensive loss	$ (7,077)	$ (3,837)	$ (19,495)	$ (22,090)