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Note 3 - Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) - USD ($) |  | 12 Months Ended
--- | --- | ---
Apr. 18, 2022 | Dec. 31, 2022 | Dec. 31, 2021
Reverse Stock Split, Fractional Shares, Cash, Multiple | $ 12.93 |  |
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill) |  | $ 0 | $ 8,639,000
Income Tax Expense (Benefit), Total |  | $ (0) | $ (443,893)

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