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Note 10 - Borrowings (Details Textual) - USD ($)
Apr. 25, 2024
Aug. 15, 2023
Jun. 06, 2022
Dec. 31, 2024
Dec. 31, 2023
Long-Term Debt       $ 19,952,000  
Bank Term Funding Program (BTFP) [Member] | Federal Reserve Bank Advances [Member]          
Short-Term Debt       0 $ 83,100,000
Short-Term Debt, Weighted Average Interest Rate, at Point in Time         4.41%
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  
Debt Instrument, Covenant, Maximum Modified Texas Ratio       20.00%  
Debt Instrument, Modified Texas Ratio       22.70%  
Credit Agreement With Commercial Bank [Member]          
Debt Instrument, Term (Year)   15 years      
Debt Instrument, Face Amount   $ 400,000      
Debt Instrument, Interest Rate, Stated Percentage   6.50%      
Long-Term Debt       $ 0 $ 388,000
Promissory Note [Member]          
Debt Instrument, Term (Year)     4 years    
Debt Instrument, Face Amount     $ 4,000,000    
Debt Instrument, Interest Rate, Stated Percentage     3.35%    
Long-Term Debt       2,500,000 3,100,000
Debt Instrument, Periodic Payment     $ 150,000    
Federal Home Loan Bank of Des Moines [Member]          
Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds       245,300,000 280,900,000
Federal Home Loan Bank, Advance, Maturity, Year One       $ 27,000,000 $ 24,000,000
Federal Home Loan Bank of Des Moines [Member] | Weighted Average [Member]          
Federal Home Loan Bank, Advances, Interest Rate       4.42% 5.51%
Federal Home Loan Bank of Des Moines [Member] | F H L B Advances Maturing August 2026 [Member]          
Long-Term Federal Home Loan Bank Advances       $ 15,000,000  
Federal Home Loan Bank of Des Moines [Member] | F H L B Advances Maturing October 2029 [Member]          
Long-Term Federal Home Loan Bank Advances       $ 1,500,000