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	$ 880	$ 1,882	$ 1,175	$ 4,474
Operating expenses:
Research and development	17,849	25,019	34,564	42,850
General and administrative	10,323	11,098	21,843	21,857
Total operating expenses	28,172	36,117	56,407	64,707
Loss from operations	(27,292)	(34,235)	(55,232)	(60,233)
Other income, net	3,509	165	6,670	235
Net loss	$ (23,783)	$ (34,070)	$ (48,562)	$ (59,998)
Net loss per share, basic	$ (0.38)	$ (0.83)	$ (0.8)	$ (1.47)
Net loss per share, diluted	$ (0.38)	$ (0.83)	$ (0.8)	$ (1.47)
Weighted-average common shares outstanding, basic	61,794	40,890	60,764	40,768
Weighted-average common shares outstanding, diluted	61,794	40,890	60,764	40,768
Comprehensive loss:
Net loss	$ (23,783)	$ (34,070)	$ (48,562)	$ (59,998)
Other comprehensive gain (loss):
Unrealized (loss) gain on marketable securities	(549)	22	(403)	(671)
Total other comprehensive (loss) gain	(549)	22	(403)	(671)
Comprehensive loss	$ (24,332)	$ (34,048)	$ (48,965)	$ (60,669)