v3.26.1
Note 7 - Interest Rate Swaps (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Jul. 31, 2025
Jun. 21, 2024
Investment, Variable Interest Rate, Type [Extensible Enumeration] Base Rate [Member]      
Deferred Income Tax Expense (Benefit) $ 148,594 $ (50,555)    
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 94,523 340,121    
Secured Debt        
Derivative, Variable Interest Rate 3.75%      
Interest Rate Swap [Member]        
Interest Rate Derivative Liabilities, at Fair Value $ 132,274      
Deferred Income Tax Expense (Benefit) 37,751 135,839    
Accumulated Other Comprehensive Income (Loss), Net of Tax $ 94,523 340,121    
Interest Rate Derivative Assets, at Fair Value   $ 475,960    
Interest Rate Swap [Member] | Fourth IRSA With Co-Bank [Member]        
Debt Instrument, Face Amount     $ 43,750,000  
Derivative, Notional Amount     $ 43,750,000  
Debt, Weighted Average Interest Rate     7.56%  
CoBank [Member]        
Debt Instrument, Covenants, Percentage of Debt Under IRSAs 35.00%      
Debt Instrument, Face Amount       $ 180,000,000
Debt, Weighted Average Interest Rate 7.32%