Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue	$ 429	$ 25,205
Operating expenses:
Research and development	55,050	41,263
General and administrative	20,314	19,991
Total operating expenses	75,364	61,254
Loss from operations	(74,935)	(36,049)
Other income, net	490	545
Net loss	(74,445)	(35,504)
Unrealized (loss)/gain on marketable securities, net of tax	(4,118)	(186)
Comprehensive loss	$ (78,563)	$ (35,690)
Net loss per share, basic and diluted	$ (1.50)	$ (0.73)
Weighted-average common shares outstanding, basic and diluted	49,611,492	48,920,403