Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Operating expenses:
Research and development	$ 46,664	$ 23,872	$ 74,899	$ 42,496
General and administrative	6,091	6,293	13,638	12,802
Total operating expenses	52,755	30,165	88,537	55,298
Loss from operations	(52,755)	(30,165)	(88,537)	(55,298)
Other (expense) income:
Interest income	441	210	671	375
Other income (expense), net	10	0	(21)	0
Total other (expense) income, net	451	210	650	375
Net loss	$ (52,304)	$ (29,955)	$ (87,887)	$ (54,923)
Net loss per share basic	$ (1.01)	$ (0.58)	$ (1.70)	$ (1.09)
Net loss per share diluted	$ (1.01)	$ (0.58)	$ (1.70)	$ (1.09)
Weighted-average common shares outstanding used in net loss per share—basic and diluted	51,679,536	51,216,254	51,640,706	50,349,193
Comprehensive loss:
Net loss	$ (52,304)	$ (29,955)	$ (87,887)	$ (54,923)
Other comprehensive loss:
Unrealized gains (losses) on marketable securities, net	(226)	27	(887)	(14)
Comprehensive loss	$ (52,530)	$ (29,928)	$ (88,774)	$ (54,937)