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	$ (5,902)	$ (16,704)	$ (9,740)	$ (17,959)
Other comprehensive loss, net of applicable tax:
Foreign currency translation adjustments	(357)	(283)	(236)	(485)
Comprehensive loss	$ (6,259)	$ (16,987)	$ (9,976)	$ (18,444)