CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net loss	$ (28,865)	$ (29,765)	$ (93,101)	$ (74,496)
Other comprehensive loss, net of tax:
Net unrealized loss on available-for-sale marketable securities	(16)	(122)	(15)	(10)
Total comprehensive loss	$ (28,881)	$ (29,887)	$ (93,116)	$ (74,506)