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
Revenues [Abstract]
Collaboration revenue		$ 2,004		$ 7,316
Operating expenses:
Research and development	$ 9,832	15,172	$ 19,477	30,723
General and administrative	5,308	5,322	11,307	10,598
Restructuring and other charges	683		3,265
Total operating expenses	15,823	20,494	34,049	41,321
Loss from operations	(15,823)	(18,490)	(34,049)	(34,005)
Other income (expense):
Investment income	1,920	1,381	4,034	2,677
Other income (expense)	235	(6)	228	(6)
Total other income, net	2,155	1,375	4,262	2,671
Loss before income taxes	(13,668)	(17,115)	(29,787)	(31,334)
Income tax expense	(62)		(89)
Net loss	(13,730)	(17,115)	(29,876)	(31,334)
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities	(37)	35	(302)	307
Total comprehensive loss	$ (13,767)	$ (17,080)	$ (30,178)	$ (31,027)
Net loss per share:
Net loss per share, basic	$ (0.28)	$ (0.44)	$ (0.62)	$ (0.83)
Net loss per share, diluted	$ (0.28)	$ (0.44)	$ (0.62)	$ (0.83)
Weighted-average common shares outstanding, basic	48,258,111	39,292,710	48,258,111	37,783,486
Weighted-average common shares outstanding, diluted	48,258,111	39,292,710	48,258,111	37,783,486