CONDENSED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating expenses
Research and development	$ 16,616	$ 9,828	$ 46,111	$ 24,950
General and administrative	5,812	3,918	17,431	8,560
Total operating expenses	22,428	13,746	63,542	33,510
Loss from operations	(22,428)	(13,746)	(63,542)	(33,510)
Other income (expense), net:
Change in fair value of preferred stock purchase right liability				(40,163)
Interest income	81	206	295	358
Other expense, net	(6)	(153)	(14)	(149)
Total other income (expense), net	75	53	281	(39,954)
Net loss	(22,353)	(13,693)	(63,261)	(73,464)
Comprehensive loss:
Net loss	(22,353)	(13,693)	(63,261)	(73,464)
Other comprehensive gain (loss)	(36)	3	(33)	6
Comprehensive loss	$ (22,389)	$ (13,690)	$ (63,294)	$ (73,458)
Net loss per share, basic and diluted	$ (0.68)	$ (0.44)	$ (1.93)	$ (6.39)
Weighted average shares used to compute net loss per share, basic and diluted	32,902,723	30,981,441	32,823,829	11,499,327