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Note 15 - Income Taxes (Details Textual) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Dec. 31, 2025 | Dec. 31, 2024
Income Tax Expense (Benefit) |  | $ 11,570 | $ 10,056
Effective Income Tax Rate Reconciliation, Percent |  | (1.12%) | (0.47%)
Other Noncash Income Tax Expense | $ 563,252 |  |
Income Tax Examination, Penalties and Interest Expense |  | $ 0 |
Deferred Tax Assets, Net of Valuation Allowance |  | 0 |
Domestic Tax Jurisdiction [Member] |  |  |
Operating Loss Carryforwards |  | 17,496,754 |
Operating Loss Carryforwards, Not Subject to Expire |  | 16,055,226 |
Operating Loss Carryforwards, Subject to Expire |  | 1,441,528 |
Tax Credit Carryforward, Amount |  | 901,466 |
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards |  | 7,670,528 |
Operating Loss Carryforwards, Not Subject to Expire |  | 7,513,712 |
Operating Loss Carryforwards, Subject to Expire |  | 156,816 |
Tax Credit Carryforward, Amount |  | $ 745,316 |
Maximum [Member] |  |  |
Effective Income Tax Rate Reconciliation, Percent |  | 1.00% | 1.00%

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