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Organization (Details) - USD ($) $ in Thousands			12 Months Ended			20 Months Ended
	Oct. 21, 2025	Sep. 11, 2024	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2025
Product Information [Line Items]
Net loss			$ 1,079,586	$ 221,315	$ 614,928
Net cash used in operating activities			322,930	142,106	76,760
Accumulated deficit			2,294,159	1,214,573		$ 2,294,159
Cash and cash equivalents			225,266	104,862	$ 71,425	225,266
Short-term investments			488,182	$ 307,487		488,182
Private placement
Product Information [Line Items]
Proceeds from issuance of common stock	$ 500,037	$ 235,000	500,037
Distribution Agreement
Product Information [Line Items]
Proceeds from issuance of common stock			$ 106,498			$ 150,721

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