CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenues [Abstract]
Collaboration revenue	$ 14,302,000		$ 32,213,000
Operating expenses:
Research and development	28,327,000	$ 22,083,000	61,258,000	$ 40,139,000
General and administrative	15,535,000	9,207,000	30,972,000	17,241,000
Total operating expenses	43,862,000	31,290,000	92,230,000	57,380,000
Loss from operations	(29,560,000)	(31,290,000)	(60,017,000)	(57,380,000)
Other income (expense):
Interest income, net	6,304,000	521,000	10,772,000	574,000
Interest expense	(880,000)	(3,000)	(1,906,000)	(7,000)
Total other income	5,424,000	518,000	8,866,000	567,000
Loss before income taxes	(24,136,000)	(30,772,000)	(51,151,000)	(56,813,000)
Income tax (benefit) provision	(282,000)	0	47,000	0
Net loss	(23,854,000)	(30,772,000)	(51,198,000)	(56,813,000)
Other comprehensive loss:
Unrealized gain (loss) on marketable securities	(93,000)	(218,000)	214,000	(242,000)
Comprehensive loss	$ (23,947,000)	$ (30,990,000)	$ (50,984,000)	$ (57,055,000)
Net loss per share attributable to common stockholders - basic	$ (0.50)	$ (0.84)	$ (1.08)	$ (1.98)
Net loss per share attributable to common stockholders - diluted	$ (0.50)	$ (0.84)	$ (1.08)	$ (1.98)
Weighted-average common shares outstanding - basic	48,106,528	36,609,772	47,441,647	28,729,029
Weighted-average common shares outstanding - diluted	48,106,528	36,609,772	47,441,647	28,729,029