Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Collaboration revenue	$ 458	$ 525	$ 868	$ 993
Operating expenses:
Research and development	10,799	10,793	23,395	19,298
General and administrative	4,570	4,132	9,697	8,020
Loss on impairment of long-lived assets	1,592		1,592
Total operating expenses	16,961	14,925	34,684	27,318
Loss from operations	(16,503)	(14,400)	(33,816)	(26,325)
Other income:
Interest income	897	34	1,969	48
Total other income	897	34	1,969	48
Loss before income tax expense	(15,606)	(14,366)	(31,847)	(26,277)
Income tax expense	(12)		(26)
Net loss	(15,618)	(14,366)	(31,873)	(26,277)
Unrealized holding loss on short-term investments, net of tax	(15)		(37)
Comprehensive loss	$ (15,633)	$ (14,366)	$ (31,910)	$ (26,277)
Net loss per share attributable to common stockholders- basic	$ (0.36)	$ (0.42)	$ (0.79)	$ (1.12)
Net loss per share attributable to common stockholders- diluted	$ (0.36)	$ (0.42)	$ (0.79)	$ (1.12)
Weighted-average common shares outstanding-basic	43,676,387	33,946,428	40,273,472	23,535,442
Weighted-average common shares outstanding-diluted	43,676,387	33,946,428	40,273,472	23,535,442