Condensed Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue:
License and development support revenue (including related party amounts of $0, $0, $0 and $251, respectively)				$ 251
Operating Expenses [Abstract]
Research and development (including related party amounts of $27, $1,172, $50 and $1,459, respectively)	$ 17,861	$ 12,333	$ 34,914	23,488
General and administrative	4,949	3,857	10,068	7,444
Total operating expenses	22,810	16,190	44,982	30,932
Loss from operations	(22,810)	(16,190)	(44,982)	(30,681)
Other income (expense), net:
Interest income	1,561	676	3,425	1,326
Change in fair value of SAFEs (including related party amounts of $0, $1,895, $0 and $2,112, respectively)		(2,352)		(2,620)
Other income (expense), net	(5)	23	(8)	169
Total other income (expense), net	1,556	(1,653)	3,417	(1,125)
Net loss	$ (21,254)	$ (17,843)	$ (41,565)	$ (31,806)
Net loss per share - basic	$ (0.87)	$ (22)	$ (1.71)	$ (39.24)
Net loss per share - diluted	$ (0.87)	$ (22)	$ (1.71)	$ (39.24)
Weighted average common shares outstanding - basic	24,378,823	811,210	24,360,502	810,484
Weighted average common shares outstanding - diluted	24,378,823	811,210	24,360,502	810,484
Other comprehensive income (loss):
Unrealized gain (loss) on investments, net	$ 2	$ (86)	$ 131	$ (187)
Comprehensive loss	$ (21,252)	$ (17,929)	$ (41,434)	$ (31,993)