Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Finite Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 9,412,000		$ 9,412,000		$ 10,262,000
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	15,445,000		15,445,000		14,595,000
Impairment	0		0		0
Net Carrying Amount	9,412,000		9,412,000		10,262,000
Novartis | Patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,728,000		21,728,000		21,728,000
Accumulated Amortization	14,097,000		14,097,000		13,321,000
Impairment	0		0		0
Net Carrying Amount	$ 7,631,000		$ 7,631,000		$ 8,407,000
Useful Lives	14 years		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	1,348,000		1,348,000		1,274,000
Impairment	0		0		0
Net Carrying Amount	$ 1,781,000		$ 1,781,000		$ 1,855,000
Useful Lives	21 years		21 years		21 years