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Balance Sheet Accounts - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Property, Plant and Equipment [Line Items] |  |
Depreciation and amortization expense for property and equipment | $ 4.8 | $ 3.8
Buildings |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, reclassification | 162.7 | 76.0
Construction In Progress Reclassified To Building |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, reclassification | (162.7) |
Manufacturing equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, reclassification | $ 2.6 |
Manufacturing equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Useful life | 7 years |
Manufacturing equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Useful life | 10 years |
Construction In Progress Reclassified To Manufacturing Equipment |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, reclassification | $ (2.6) |
Manufacturing Facility |  |
Property, Plant and Equipment [Line Items] |  |
Useful life | 39 years |
Construction in progress |  |
Property, Plant and Equipment [Line Items] |  |
Property, plant and equipment, reclassification |  | $ (76.0)

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