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Fair Value Measurements (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Sep. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure | $ 925 |  | $ 925 |  | $ 783
Debt Securities, Trading | 4,444 |  | 4,444 |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (793) |  | (793) |  | (657)
Business Combination, Contingent Consideration, Liability, Noncurrent |  |  |  |  | (4,465)
Fair Value, Net Asset (Liability) | 17,624 |  | 17,624 |  | (4,339)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings |  |  | $ (35) |  |
Fair Value, Liability, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | Contingent consideration |  |
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements |  |  | $ (4,500) |  |
Equity Securities, FV-NI, Current | 13,048 |  | 13,048 |  |
Equity Securities, FV-NI, Unrealized Gain (Loss) | (1,852) | $ 0 | (1,852) | $ 0 |
Debt Securities, Trading, Unrealized Gain (Loss) | (57) | 0 | 62 | 0 |
Debt and Equity Securities, Unrealized Gain (Loss) | 0 | $ (1,909) | 0 | $ (1,790) |
Fair Value, Inputs, Level 1 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Assets, Fair Value Disclosure | 925 |  | 925 |  | 783
Debt Securities, Trading | 4,444 |  | 4,444 |  |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (793) |  | (793) |  | (657)
Fair Value, Net Asset (Liability) | 17,624 |  | 17,624 |  | 126
Equity Securities, FV-NI, Current | 13,048 |  | 13,048 |  |
Fair Value, Inputs, Level 3 [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Business Combination, Contingent Consideration, Liability, Noncurrent | 0 |  | 0 |  | (4,465)
Fair Value, Net Asset (Liability) | $ 0 |  | $ 0 |  | $ (4,465)

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