Unaudited Consolidated 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
Statement of Comprehensive Income [Abstract]
Collaboration revenues	$ 3,827	$ 2,578	$ 10,630	$ 6,103
Operating expenses:
Research and development	19,551	15,557	54,710	38,536
General and administrative	6,620	3,772	22,201	8,407
Total operating expenses	26,171	19,329	76,911	46,943
Operating loss	(22,344)	(16,751)	(66,281)	(40,840)
Change in fair value of derivative liability	0	(668)	(84)	(1,369)
Interest income (expense), net	941	(908)	641	(2,278)
Pre-tax loss	(21,403)	(18,327)	(65,724)	(44,487)
Income tax expense	0	0	(197)	0
Net loss	$ (21,403)	$ (18,327)	$ (65,921)	$ (44,487)
Share information:
Net loss per share of common stock, basic (in USD per share)	$ (0.53)	$ (8.37)	$ (2.11)	$ (21.14)
Net loss per share of common stock, diluted (in USD per share)	$ (0.53)	$ (8.37)	$ (2.11)	$ (21.14)
Weighted-average shares of common stock outstanding, basic (in shares)	40,285,858	2,189,265	31,209,904	2,104,105
Weighted-average shares of common stock outstanding, diluted (in shares)	40,285,858	2,189,265	31,209,904	2,104,105
Comprehensive loss
Net loss	$ (21,403)	$ (18,327)	$ (65,921)	$ (44,487)
Unrealized gain (loss) on marketable securities	108	37	414	(160)
Comprehensive loss	$ (21,295)	$ (18,290)	$ (65,507)	$ (44,647)