Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Finite Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 10,262,000	$ 11,962,000
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	14,595,000	12,895,000
Impairment	0	0
Net Carrying Amount	10,262,000	11,962,000
Novartis | Patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,728,000	21,728,000
Accumulated Amortization	13,321,000	11,770,000
Impairment	0	0
Net Carrying Amount	$ 8,407,000	$ 9,958,000
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	1,274,000	1,125,000
Impairment	0	0
Net Carrying Amount	$ 1,855,000	$ 2,004,000
Useful Lives	21 years	21 years