Condensed Statements of Operations and Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Operating expenses:
Research and development (including $27 and $32,128 for a related party)	$ 30,753	$ 45,042
General and administrative (including $322 and $230 for a related party)	15,399	6,690
Total operating expenses	46,152	51,732
Loss from operations	(46,152)	(51,732)
Other income (expense), net:
Change in fair value of tranche liability (including $331 and $19,064 for a related party)	365	21,012
Change in fair value of derivative liabilities (including $1,165 and $2,039 for a related party)	1,229	2,084
Interest expense (including $1,384 and $2,656 for a related party)	(1,443)	(2,701)
Loss on extinguishment and on issuance of convertible promissory notes (including $169 and $34,692 for a related party)	(186)	(38,018)
Other income, net	2,749	188
Total other income (expense), net	2,714	(17,435)
Net loss	$ (43,438)	$ (69,167)
Net loss per share attributable to common stockholders - basic	$ (2.85)	$ (51.77)
Net loss per share attributable to common stockholders - diluted	$ (2.85)	$ (51.77)
Weighted-average shares outstanding - basic	15,267,817	1,335,925
Weighted-average shares outstanding - diluted	15,267,817	1,335,925
Comprehensive loss:
Net loss	$ (43,438)	$ (69,167)
Other comprehensive income:
Unrealized gain on marketable securities, net of tax	6	0
Total other comprehensive income	6	0
Comprehensive loss	$ (43,432)	$ (69,167)