CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2020	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (13,161)	$ (18,253)	$ (28,834)	$ (28,310)
Other comprehensive income (loss)
Unrealized gain (loss) on available-for-sale securities, net of tax	(669)	(307)	(1,643)	(307)
Adjustment for net gain (loss) realized on available-for-sale securities and included in net income, net of tax	0	0	1	0
Total change in other comprehensive income (loss)	(669)	(307)	(1,642)	(307)
Comprehensive loss	$ (13,830)	$ (18,560)	$ (30,476)	$ (28,617)