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Note 11 - Income Taxes - Rate Reconciliation of Income Tax Rate (Details) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Federal tax benefit at statutory rate 21.00% 21.00%
US Federal statutory tax rate $ 5,671,648  
State tax, net of federal benefit 0.00% [1] 4.40%
State and local income tax, net of federal (national) income tax effect (a) [1] $ 0  
Research and development credits 4.20% 3.20%
Tax credits $ 1,121,821  
Tax credits (4.20%)  
Change in valuation allowance (22.90%) (27.30%)
Changes in valuation allowances $ 6,188,171  
Share-based compensation 0.00% (1.10%)
Nontaxable or nondeductible items $ 605,298  
Nontaxable or nondeductible items (2.30%)  
Other (2.30%) (0.20%)
Total provision $ 0  
Total provision 0.00% 0.00%
[1] State taxes in Illinois and Massachusetts made up the majority of the tax effect in this category