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Note 3 - Summary of Significant Accounting Policies (Details Textual) | Oct. 15, 2024 USD ($) | Sep. 30, 2024 USD ($) | Dec. 31, 2023 USD ($) | Sep. 30, 2023
--- | --- | --- | --- | ---
Cash, FDIC Insured Amount |  | $ 250,000 |  |
Cash, Uninsured Amount |  | 1,000,000 |  |
Contract with Customer, Liability |  | $ 104,000 | $ 42,000 |
Subsequent Event [Member] | Termination of Employment, Thomas Seifert, CFO [Member] |  |  |  |
Payments for Legal Settlements | $ 600,000 |  |  |
Subsequent Event [Member] | Termination of Employment, Thomas Seifert, CFO [Member] | Settled Litigation [Member] |  |  |  |
Litigation Settlement, Amount Awarded to Other Party | 150,000 |  |  |
Payments for Legal Settlements | $ 600,000 |  |  |
Closing Rate [Member] |  |  |  |
Foreign Currency Exchange Rate, Translation |  | 1.31 | 1.27 | 1.23
Quarterly Average Rate [Member] |  |  |  |
Foreign Currency Exchange Rate, Translation |  | 1.3 |  | 1.26
Yearly Average Rate [Member] |  |  |  |
Foreign Currency Exchange Rate, Translation |  |  | 1.24 |
Maximum [Member] |  |  |  |
Cash, FDIC Insured Amount |  | $ 250,000 |  |

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