Condensed Consolidated Statements of Operations and Comprehensive Loss (unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Collaboration revenue	$ 598	$ 458	$ 1,130	$ 868
Operating expenses:
Research and development	13,264	10,799	31,502	23,395
General and administrative	5,139	4,570	10,957	9,697
Impairment of property and equipment	1,883	1,592	1,883	1,592
Impairment of right-of-use assets	22,836		22,836
Restructuring and other related charges	6,450		6,450
Total operating expenses	49,572	16,961	73,628	34,684
Loss from operations	(48,974)	(16,503)	(72,498)	(33,816)
Other income:
Interest income	855	897	1,941	1,969
Total other income	855	897	1,941	1,969
Loss before income tax expense	(48,119)	(15,606)	(70,557)	(31,847)
Income tax expense	(12)	(12)	(26)	(26)
Net loss	(48,131)	(15,618)	(70,583)	(31,873)
Unrealized holding loss on short-term investments, net of tax	(29)	(15)	(37)	(37)
Comprehensive loss	$ (48,160)	$ (15,633)	$ (70,620)	$ (31,910)
Net loss per share attributable to common stockholders- basic	$ (0.74)	$ (0.36)	$ (1.09)	$ (0.79)
Net loss per share attributable to common stockholders- diluted	$ (0.74)	$ (0.36)	$ (1.09)	$ (0.79)
Weighted-average common shares outstanding-basic	65,459,678	43,676,387	64,739,520	40,273,472
Weighted-average common shares outstanding-diluted	65,459,678	43,676,387	64,739,520	40,273,472