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Note 9 - Borrowings (Details Textual) - USD ($)
Apr. 25, 2024
Jun. 06, 2022
Jun. 30, 2025
Dec. 31, 2024
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds     $ 235,700,000 $ 245,300,000
Long-Term Federal Home Loan Bank Advances     $ 27,500,000 $ 43,500,000
Federal Home Loan Bank of Des Moines [Member] | Weighted Average [Member]        
Federal Home Loan Bank, Advances, Interest Rate     4.16% 4.42%
Promissory Note and Line of Credit Agreement [Member]        
Debt Instrument, Term (Year) 2 years      
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000,000      
Long-Term Line of Credit     $ 1,000,000 $ 1,000,000
Debt Instrument, Covenant, Maximum Modified Texas Ratio     20.00%  
Debt Instrument, Modified Texas Ratio       22.70%
Promissory Note [Member]        
Debt Instrument, Term (Year)   4 years    
Debt Instrument, Face Amount   $ 4,000,000    
Debt Instrument, Periodic Payment   $ 150,000    
Debt Instrument, Interest Rate, Stated Percentage   3.35%    
Long-Term Debt     $ 2,200,000 $ 2,500,000