Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Revenue:
Collaboration revenue		$ 32,923
License and development support revenue (including related party amounts of $251 and $569, respectively)	$ 251	569
Total revenue	251	33,492
Operating Expenses [Abstract]
Research and development (including related party amounts of $3,168 and $3,832, respectively)	50,328	50,251
General and administrative	17,205	13,912
Total operating expenses	67,533	64,163
Loss from operations	(67,282)	(30,671)
Other income, net:
Interest income	5,349	2,535
Change in fair value of SAFEs (including related party amounts of $2,911 and $573, respectively)	(3,597)	(707)
Other income, net	157	195
Total other income, net	1,909	2,023
Loss before provision for income taxes	(65,373)	(28,648)
Provision for income taxes	0	(72)
Net loss	$ (65,373)	$ (28,720)
Net income (loss) per share - basic	$ (5.81)	$ (35.78)
Net income (loss) per share - diluted	$ (5.81)	$ (35.78)
Weighted average common shares outstanding - basic	11,258,851	802,747
Weighted average common shares outstanding - diluted	11,258,851	802,747
Other comprehensive income (loss):
Unrealized gain (loss) on investments	$ (437)	$ 308
Comprehensive loss	$ (65,810)	$ (28,412)