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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)
 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Finite Lived Intangible Assets [Line Items]      
Net Carrying Amount $ 8,562,000 $ 10,262,000  
Amortization expense 1,700,000 1,700,000 $ 1,700,000
Novartis      
Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 24,857,000 24,857,000  
Accumulated Amortization 16,295,000 14,595,000  
Impairment 0 0  
Net Carrying Amount 8,562,000 10,262,000  
Novartis | Patents      
Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount 21,728,000 21,728,000  
Accumulated Amortization 14,873,000 13,321,000  
Impairment 0 0  
Net Carrying Amount $ 6,855,000 $ 8,407,000  
Useful Lives 14 years 14 years  
Novartis | License      
Finite Lived Intangible Assets [Line Items]      
Gross Carrying Amount $ 3,129,000 $ 3,129,000  
Accumulated Amortization 1,422,000 1,274,000  
Impairment 0 0  
Net Carrying Amount $ 1,707,000 $ 1,855,000  
Useful Lives 21 years 21 years