Unaudited Condensed Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Collaboration revenue	$ 2,517	$ 1,813	$ 5,622	$ 5,767
Operating expenses:
Research and development	11,892	13,737	42,681	38,007
General and administrative	6,438	6,098	19,783	16,585
Total operating expenses	18,330	19,835	62,464	54,592
Loss from operations	(15,813)	(18,022)	(56,842)	(48,825)
Other income:
Interest income	4,245	1,326	10,307	1,831
Total other income	4,245	1,326	10,307	1,831
Net loss	(11,568)	(16,696)	(46,535)	(46,994)
Other comprehensive gain (loss):
Unrealized gain (loss) on available-for-sale securities, net	(115)	(370)	360	(2,007)
Comprehensive loss	$ (11,683)	$ (17,066)	$ (46,175)	$ (49,001)
Net loss per common share, basic	$ (0.25)	$ (0.4)	$ (1.08)	$ (1.13)
Net loss per common share, diluted	$ (0.25)	$ (0.4)	$ (1.08)	$ (1.13)
Weighted-average shares of common stock outstanding, basic	45,708,649	41,526,524	43,117,403	41,431,023
Weighted-average shares of common stock outstanding diluted	45,708,649	41,526,524	43,117,403	41,431,023