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Note 19 - Income Taxes - Effective Income Tax Rate Reconciliation (Details)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Statutory rate 21.00% 21.00%
State tax 3.10% 4.50%
Stock-based compensation expense (1.40%) (1.40%)
Change in valuation allowance (16.50%) (19.50%)
Warrant/equity expenses (4.00%) (3.70%)
Expiration of tax attributes (2.20%) 0.00%
Impairment of assets 0.00% (0.90%)
Other 0.00% (0.10%)
Total 0.00% 0.00%