CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (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	$ 43,735	$ 0	$ 87,165	$ 0
Operating expenses:
Research and development	22,191	18,958	71,593	50,924
General and administrative	7,532	6,978	23,639	20,745
Total operating expenses	29,723	25,936	95,232	71,669
Income (loss) from operations	14,012	(25,936)	(8,067)	(71,669)
Other income:
Interest and other income	4,051	799	10,926	1,682
Total other income	4,051	799	10,926	1,682
Income (loss) before benefit from income taxes	18,063	(25,137)	2,859	(69,987)
Benefit from income taxes	17,398	0	0	0
Net income (loss)	$ 35,461	$ (25,137)	$ 2,859	$ (69,987)
Net income (loss) per share, basic (in dollars per share)	$ 1.07	$ (0.80)	$ 0.09	$ (2.24)
Net income (loss) per share, diluted (in dollars per share)	$ 1.02	$ (0.80)	$ 0.08	$ (2.24)
Weighted-average common shares outstanding, basic (in shares)	33,281,287	31,298,052	32,942,958	31,273,612
Weighted-average common shares outstanding, diluted (in shares)	34,775,451	31,298,052	34,289,411	31,273,612
Other comprehensive income (loss):
Unrealized gain (loss) on marketable securities	$ 509	$ (482)	$ 1,561	$ (2,747)
Total other comprehensive gain (loss)	509	(482)	1,561	(2,747)
Total comprehensive income (loss)	$ 35,970	$ (25,619)	$ 4,420	$ (72,734)