Consolidated statements of comprehensive loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (76,677)	$ (37,560)	$ (42,590)
Other comprehensive income (loss):
Net unrealized gain (loss) on marketable debt securities	(191)		14
Total comprehensive loss	$ (76,868)	$ (37,560)	$ (42,576)