Condensed Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operating expenses:
Research and development	$ 23,403	$ 24,688	$ 70,547	$ 62,084
General and administrative	10,135	8,985	32,886	26,908
Total operating expenses	33,538	33,673	103,433	88,992
Loss from operations	(33,538)	(33,673)	(103,433)	(88,992)
Other income (expense), net:
Interest and other income, net	1,282	70	2,011	248
Total other income (expense), net	1,282	70	2,011	248
Net loss	(32,256)	(33,603)	(101,422)	(88,744)
Other comprehensive income (loss):
Net unrealized gain (loss) on available-for-sale securities	(389)	1	(1,011)	26
Net comprehensive loss	$ (32,645)	$ (33,602)	$ (102,433)	$ (88,718)
Net loss per share, basic (in dollars per share)	$ (0.57)	$ (0.61)	$ (1.81)	$ (1.63)
Net loss per share, diluted (in dollars per share)	$ (0.57)	$ (0.61)	$ (1.81)	$ (1.63)
Weighted-average shares of common stock, basic (in shares)	56,318,571	54,977,085	56,093,091	54,549,747
Weighted-average shares of common stock, diluted (in shares)	56,318,571	54,977,085	56,093,091	54,549,747