Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Finite Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 11,112,000		$ 11,112,000		$ 11,962,000
Amortization expense	400,000	$ 400,000	900,000	$ 900,000
Novartis
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,857,000		24,857,000		24,857,000
Accumulated Amortization	13,745,000		13,745,000		12,895,000
Impairment	0		0		0
Net Carrying Amount	11,112,000		11,112,000		11,962,000
Novartis | Patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,728,000		21,728,000		21,728,000
Accumulated Amortization	12,545,000		12,545,000		11,770,000
Impairment	0		0		0
Net Carrying Amount	9,183,000		$ 9,183,000		$ 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		$ 3,129,000
Accumulated Amortization	1,200,000		1,200,000		1,125,000
Impairment	0		0		0
Net Carrying Amount	$ 1,929,000		$ 1,929,000		$ 2,004,000
Useful Lives			21 years		21 years