CONDENSED 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
Income Statement [Abstract]
Collaboration revenue	$ 1,393		$ 2,206
Operating expenses:
Research and development	18,920	$ 19,707	37,305	$ 33,834
General and administrative	5,532	4,054	11,836	8,353
Total operating expense	24,452	23,761	49,141	42,187
Loss from operations	(23,059)	(23,761)	(46,935)	(42,187)
Other income (expense), net
Interest income, net	395	176	593	232
Change in fair value of preferred stock right liability				(6,084)
Total other income (expense), net	395	176	593	(5,852)
Net loss	(22,664)	(23,585)	(46,342)	(48,039)
Net unrealized (loss) gain on marketable securities	(407)	41	(1,482)	(23)
Comprehensive loss	$ (23,071)	$ (23,544)	$ (47,824)	$ (48,062)
Net loss per share, basic and diluted	$ (0.61)	$ (0.64)	$ (1.25)	$ (1.65)
Weighted-average shares outstanding, basic and diluted	37,293,557	36,595,112	37,211,174	29,088,267