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Income Taxes - Textual (Details) | 12 Months Ended
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Sep. 30, 2023 USD ($)
Operating Loss Carryforwards [Line Items] |
Undistributed earnings | $ 6,400,000
Federal |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards, utilized amount | 84,900,000
Net operating loss carryforwards | 0
Federal | Research tax credit carryforward |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward | 54,400,000
State |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards | 25,400,000
State | Research tax credit carryforward |
Operating Loss Carryforwards [Line Items] |
Tax credit carryforward | 47,000,000
Foreign |
Operating Loss Carryforwards [Line Items] |
Net operating loss carryforwards | $ 46,900,000

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