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Significant Accounting Policies (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2026
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Franchisor Disclosure [Line Items]            
Off-balance sheet concentrations of credit risk   $ 0   $ 0   $ 0
Equity securities without readily determinable fair value, impairment loss       0 $ 0  
Restricted cash   3,100,000   3,100,000   3,100,000
Research and development expense due to cost share payments to related party   $ 97,019,000 $ 102,696,000 200,865,000 $ 218,923,000  
AVLAYAH            
Franchisor Disclosure [Line Items]            
Research and development expense due to cost share payments to related party       $ 12,600,000    
Royalty Pharma | Royalty Agreement            
Franchisor Disclosure [Line Items]            
Authorized funding           $ 275,000,000.0
Royalty rate           9.25%
Proceeds received $ 200,000,000.0