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Note 3 - Summary of Significant Accounting Policies (Details Textual) | Jun. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jun. 30, 2023
--- | --- | --- | ---
Cash, FDIC Insured Amount | $ 250,000 |  |
Cash, Uninsured Amount | 4,400,000 |  |
Contract with Customer, Liability | $ 142,000 | $ 42,000 |
Closing Rate [Member] |  |  |
Foreign Currency Exchange Rate, Translation | 1.28 | 1.27 | 1.23
Yearly Average Rate [Member] |  |  |
Foreign Currency Exchange Rate, Translation | 1.27 | 1.24 | 1.22
Maximum [Member] |  |  |
Cash, FDIC Insured Amount | $ 250,000 |  |

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