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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2023
Finite Lived Intangible Assets [Line Items] |  |  |
Net Carrying Amount | $ 6,861 | $ 8,562 |
Amortization expense | 1,700 | 1,700 | $ 1,700
Novartis |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 24,857 | 24,857 |
Accumulated Amortization | 17,996 | 16,295 |
Impairment | 0 | 0 |
Net Carrying Amount | 6,861 | 8,562 |
Novartis | Patents |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | 21,728 | 21,728 |
Accumulated Amortization | 16,426 | 14,873 |
Impairment | 0 | 0 |
Net Carrying Amount | $ 5,302 | $ 6,855 |
Useful Lives | 14 years | 14 years |
Novartis | License |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Amount | $ 3,129 | $ 3,129 |
Accumulated Amortization | 1,570 | 1,422 |
Impairment | 0 | 0 |
Net Carrying Amount | $ 1,559 | $ 1,707 |
Useful Lives | 21 years | 21 years |

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