Selected Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 11,088	$ 7,886	$ 5,224	$ 3,798	$ 2,332	$ 789	$ 216	$ 334	$ 27,996	$ 3,671	$ 1,092
General and administrative	3,649	4,752	3,211	2,059	1,167	346	79	64	13,671	1,656	103
Total operating expenses	14,737	12,638	8,435	5,857	3,499	1,135	295	398	41,667	5,327	1,195
Loss from operations	(14,737)	(12,638)	(8,435)	(5,857)	(3,499)	(1,135)	(295)	(398)	(41,667)	(5,327)	(1,195)
Interest and other income (loss), net	27	32	36	5	1		2		100	3	(3)
Net loss	$ (14,710)	$ (12,606)	$ (8,399)	$ (5,852)	$ (3,498)	$ (1,135)	$ (293)	$ (398)	$ (41,567)	$ (5,324)	$ (1,198)
Net loss per share, basic and diluted	$ (0.51)	$ (0.43)	$ (0.33)	$ (0.49)	$ (0.29)	$ (0.10)	$ (0.03)	$ (0.05)	$ (1.74)	$ (0.51)	$ (0.20)
Weighted-average number of shares outstanding, basic and diluted	29,061,076	29,001,213	25,161,038	11,964,205	11,871,494	11,724,100	9,746,868	8,758,995	23,858,552	10,532,942	6,051,712