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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%