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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

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