Condensed Consolidated Statements of Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (6,740)	$ (5,446)	$ (13,197)	$ (17,717)
Other comprehensive loss, net of tax:
Foreign currency translation adjustments	6	5	(23)	7
Other comprehensive (loss) income, net of tax	6	5	(23)	7
Comprehensive loss	$ (6,734)	$ (5,441)	$ (13,220)	$ (17,710)