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Note 18 - Income Taxes - Effective Income Tax Reconciliation (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Federal statutory income tax rate         21.00% 21.00%
State income taxes         0.00% 0.00%
Permanent differences         0.10% 0.10%
Change in effective state income tax rate         0.00% 0.00%
True up prior year tax return         (0.50%) (0.50%)
Change in valuation allowance         (20.60%) (20.60%)
Net effective income tax rate 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%