Consolidated Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Collaboration revenues	$ 14,919	$ 9,834
Operating expenses:
Research and development	74,125	56,618
General and administrative	29,525	9,378
Total operating expenses	103,650	65,996
Operating loss	(88,731)	(56,162)
Change in fair value of derivative liability	(84)	(1,919)
Interest income (expense), net	1,936	(3,145)
Net loss	$ (86,879)	$ (61,226)
Share information:
Net loss per share of common stock, basic (in USD per share)	$ (2.59)	$ (28.77)
Net loss per share of common stock, diluted (in USD per share)	$ (2.59)	$ (28.77)
Weighted-average shares of common stock outstanding, basic (in shares)	33,524,197	2,128,069
Weighted-average shares of common stock outstanding, diluted (in shares)	33,524,197	2,128,069
Comprehensive loss
Net loss	$ (86,879)	$ (61,226)
Unrealized gain (loss) on marketable securities	440	(41)
Less: reclassification to net loss of previous unrealized gain on marketable securities	(399)	0
Comprehensive loss	$ (86,838)	$ (61,267)