v3.26.3
Long-Term Debt - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2024
Jun. 30, 2025
Debt Instrument [Line Items]            
Interest expense, debt $ 3 $ 4 $ 10 $ 7    
Debt instrument, interest rate, effective percentage 13.00% 13.00% 13.00% 13.00%    
Hercules Agreement | Secured Debt            
Debt Instrument [Line Items]            
Debt instrument, face amount         $ 250  
Proceeds from issuance of secured debt         50  
Debt instrument, additional committed amount           $ 50
Debt instrument, face amount, contingently available         150  
Hercules Agreement | Secured Debt | Tranche One            
Debt Instrument [Line Items]            
Debt instrument, face amount, contingently available         $ 50  
Debt instrument, milestone achievement period         90 days  
Hercules Agreement | Secured Debt | Tranche Two            
Debt Instrument [Line Items]            
Debt instrument, additional committed amount         $ 50  
Debt instrument, face amount, contingently available         $ 50  
Debt instrument, milestone achievement period         90 days