Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2024
Finite Lived Intangible Assets [Line Items]
Net Carrying Amount	$ 7,711		$ 7,711		$ 8,562
Amortization expense	400	$ 400	900	$ 900
Novartis
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	24,857		24,857		24,857
Accumulated Amortization	17,146		17,146		16,295
Impairment	0		0		0
Net Carrying Amount	7,711		7,711		8,562
Novartis | Patents
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,728		21,728		21,728
Accumulated Amortization	15,649		15,649		14,873
Impairment	0		0		0
Net Carrying Amount	$ 6,079		$ 6,079		$ 6,855
Useful Lives (in years)	14 years		14 years		14 years
Novartis | License
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,129		$ 3,129		$ 3,129
Accumulated Amortization	1,497		1,497		1,422
Impairment	0		0		0
Net Carrying Amount	$ 1,632		$ 1,632		$ 1,707
Useful Lives (in years)	21 years		21 years		21 years