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Note 15 - Derivative Financial Instruments (Details Textual) - Interest Rate Swap [Member] | Jun. 26, 2023 USD ($) | Dec. 31, 2023 USD ($) | Jun. 16, 2022 USD ($) | Oct. 12, 2021 USD ($) | Oct. 17, 2014
--- | --- | --- | --- | --- | ---
Eurobank [Member] |  |  |  |  |
Derivative, Number of Instruments Held, Total |  | 1 |  |  | 1
Derivative, Notional Amount |  | $ 20,000,000 |  | $ 10,000,000 |
Derivative, Fixed Interest Rate |  |  |  | 1.09% |
Derivative Instruments Not Designated as Hedging Instruments, Gain | $ 846,000 |  |  |  |
Piraeus Bank S.A. [Member] |  |  |  |  |
Derivative, Notional Amount |  |  | $ 20,000,000 |  |
Derivative, Fixed Interest Rate |  |  | 3.41% |  |

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