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Note 10 - Borrowings (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2019
Dec. 31, 2020
Federal Home Loan Bank Percentage of Fair Value of Collateral 45.00%    
Long-term Line of Credit, Total $ 0   $ 0
Revolving Credit Facility [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000    
Notes Payable to Banks [Member]      
Proceeds from Issuance of Long-term Debt, Total   $ 11,200  
Debt Instrument, Interest Rate, Effective Percentage   4.24%  
Notes Payable to Banks [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate   2.50%  
Line of Credit [Member]      
Line of Credit Facility, Maximum Borrowing Capacity   $ 3,000  
Line of Credit [Member] | Minimum [Member]      
Debt Instrument, Interest Rate, Stated Percentage 3.50%    
Line of Credit [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate 2.50%    
Federal Home Loan Bank [Member]      
Line of Credit Facility, Remaining Borrowing Capacity $ 145,900    
Federal Reserve Bank Borrowings [Member]      
Line of Credit Facility, Remaining Borrowing Capacity 57,200    
Long-term Line of Credit, Total $ 0   $ 0
Mortgage Loans Freeof Other Pledges Liensand Encumbrances [Member]      
Federal Home Loan Bank Percentage of Fair Value of Collateral 80.00%    
Investment Securities Freeof Other Pledges Liensand Encumbrances [Member]      
Federal Home Loan Bank Percentage of Fair Value of Collateral 95.00%