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Note 11 - Borrowed Funds (Details Textual) - USD ($)
48 Months Ended
Sep. 30, 2020
Sep. 30, 2025
Dec. 31, 2022
Dec. 31, 2021
Unsecured Line of Credit [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 14,500,000  
Secured Line of Credit [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     9,000,000  
Federal Home Loan Bank Advances [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     60,500,000  
Federal Reserve Bank Advances [Member]        
Line of Credit Facility, Maximum Borrowing Capacity     $ 25,400,000  
Loan to Fund Merger Consideration [Member]        
Debt Instrument, Face Amount $ 17,000,000      
Payments of Debt Issuance Costs 28,126      
Proceeds from Issuance of Long-term Debt, Total $ 16,971,874      
Debt Instrument, Interest Rate, Stated Percentage 4.10%   4.10% 4.10%
Long-Term Debt, Maturity, Year Five     $ 9,916,667  
Loan to Fund Merger Consideration [Member] | Forecast [Member]        
Debt Instrument, Periodic Payment, Total   $ 646,472