STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Collaboration revenue	$ 5,729	$ 1,260
Operating expenses:
Research and development	73,123	75,655
General and administrative	22,927	18,393
Total operating expense	96,050	94,048
Loss from operations	(90,321)	(92,788)
Other income (expense), net
Interest income	2,223	281
Change in fair value of convertible preferred stock purchase right liability		(6,084)
Total other income (expense), net	2,223	(5,803)
Net loss	(88,098)	(98,591)
Net unrealized loss on marketable securities	(598)	(321)
Comprehensive loss	$ (88,696)	$ (98,912)
Net loss per share, basic	$ (2.36)	$ (2.97)
Net loss per share, diluted	$ (2.36)	$ (2.97)
Weighted-average shares outstanding, basic	37,358,425	33,196,712
Weighted-average shares outstanding, diluted	37,358,425	33,196,712