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Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Sep. 30, 2023
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Net Carrying Amount | $ 8,987 |  | $ 8,987 |  | $ 10,262
Amortization expense | 400 | $ 400 | 1,300 | $ 1,300 |
Novartis |  |  |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 24,857 |  | 24,857 |  | 24,857
Accumulated Amortization | 15,870 |  | 15,870 |  | 14,595
Impairment | 0 |  | 0 |  | 0
Net Carrying Amount | 8,987 |  | 8,987 |  | 10,262
Novartis | Patents |  |  |  |  |
Finite Lived Intangible Assets [Line Items] |  |  |  |  |
Gross Carrying Amount | 21,728 |  | 21,728 |  | 21,728
Accumulated Amortization | 14,485 |  | 14,485 |  | 13,321
Impairment | 0 |  | 0 |  | 0
Net Carrying Amount | $ 7,243 |  | $ 7,243 |  | $ 8,407
Useful Lives | 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 | 1,385 |  | 1,385 |  | 1,274
Impairment | 0 |  | 0 |  | 0
Net Carrying Amount | $ 1,744 |  | $ 1,744 |  | $ 1,855
Useful Lives | 21 years |  | 21 years |  | 21 years

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 55 -Paragraph 40 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482640/350-30-55-40 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482686/350-30-45-2 + Details
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