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Note 7 - Long-term Debt - Long-term Debt (Details) (Parentheticals) - Debt Instruments, Excluding Paycheck Protection Program Liability [Member] | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2023 | Sep. 30, 2023
Term Loans, Two [Member] |  |
Interest rate | 1.30% | 1.30%
Seller Note [Member] |  |
Interest rate | 4.00% | 4.00%
Maturity date | Sep. 30, 2025 | Sep. 30, 2025

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