Fair Value Measurements - Summary of Changes in The Fair Value of Level 3 (Details) - USD ($) $ in Thousands		6 Months Ended	12 Months Ended
		Dec. 31, 2024	Dec. 31, 2025
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Change in fair value of Convertible Notes payable	[1]	$ 12,600	$ 21,584
Convertible Notes Payable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance			107,600
Convertible Notes payable issuance		95,000
Change in fair value of Convertible Notes payable		12,600	21,584
Conversion of convertible notes into common stock and pre-funded warrants upon the Closing			$ (129,184)
Ending Balance		$ 107,600

[1] Includes related party amount of $4.6 million for the year ended December 31, 2025 and $2.7 million for the period from June 18, 2024 (inception) to December 31, 2024 (see Note 13).