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Royalty Financing Obligation - Schedule of Royalty Financing Obligation (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Aug. 31, 2024
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Debt Instrument, Increase (Decrease), Net [Roll Forward]            
Accretion of imputed interest expense on royalty financing obligation   $ 2,415 $ 2,820 $ 7,008 $ 8,128  
Less: one-time payment for expiration of second tranche $ (2,000)     0   $ (2,000)
Royalty Financing            
Debt Instrument, Increase (Decrease), Net [Roll Forward]            
Royalty financing obligation – beginning balance       37,139 33,490 33,490
Accretion of imputed interest expense on royalty financing obligation   2,415 $ 2,820 7,008 $ 8,128 10,830
Less: royalty payments made to RTW       (6,414)   (5,181)
Royalty financing obligation – ending balance   37,733   37,733   37,139
Less: royalty payable to RTW classified within accrued expenses   (2,905)   (2,905)   (1,890)
Long-term debt   $ 34,828   $ 34,828   $ 35,249