UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - 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	$ (8,822)	$ (5,816)	$ (11,983)	$ (16,322)
Unrealized gains (losses) on available for sale securities, net of tax	(138)	0	227	0
Other comprehensive (loss) income	(138)	0	227	0
Comprehensive loss	$ (8,960)	$ (5,816)	$ (11,756)	$ (16,322)