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Note 10 - Income Taxes (Details Textual) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Deferred Tax Liabilities, Gross | $ 1,746,000 | $ 2,007,000
Deferred Tax Assets, Net of Valuation Allowance | 1,773,000 | 2,015,000
Deferred Tax Assets, Valuation Allowance | $ 3,018,000 | 2,965,000
Open Tax Year | 2021 2022 2023 2024 |
Income Tax Examination, Penalties and Interest Accrued | $ 0 | 0
Income Taxes Paid, Net | 34,000 | $ 200,000
Operating Loss Carryforwards | 6,000,000 |
Operating Loss Carryforwards, Not Subject to Expiration | 2,100,000 |
State and Local Jurisdiction [Member] |  |
Operating Loss Carryforwards | $ 16,300,000 |

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