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Note 9 - Borrowed Funds (Details Textual)
$ in Thousands
Dec. 31, 2021
USD ($)
Jan. 31, 2021
Dec. 31, 2020
USD ($)
Long-term Line of Credit, Total $ 0   $ 0
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 407,800    
Loans from Other Federal Home Loan Banks 20,000    
Deposits with Other Federal Home Loan Banks 138,500    
Federal Home Loan Bank, Advances, General Debt Obligations, Maximum Amount Available 249,300    
Federal Home Loan Bank Advances, Maturing 2023 to 2025 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total $ 15,000    
Federal Home Loan Bank Advances, Number of Advances Outstanding   3  
Federal Home Loan Bank Advances, Maturing 2023 to 2025 [Member] | Minimum [Member]      
Federal Home Loan Bank, Advances, Interest Rate 1.65%    
Federal Home Loan Bank Advances, Maturing 2023 to 2025 [Member] | Maximum [Member]      
Federal Home Loan Bank, Advances, Interest Rate 2.79%    
Federal Home Loan Bank Advances, Maturing 2023 to 2025, Advance 1 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total $ 5,000    
Federal Home Loan Bank Advances, Maturing 2023 to 2025, Advance 2 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total 5,000    
Federal Home Loan Bank Advances, Maturing 2023 to 2025, Advance 3 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total 5,000    
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 2 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 3 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 4 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 5 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 6 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023, Advance 1 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     5,000
Federal Home Loan Bank Advances, Maturing 2020 to 2023 [Member]      
Federal Home Loan Bank, Advances, Par Value, Total     30,000
Line of Credit [Member]      
Long-term Line of Credit, Total 2,100   2,100
Line of Credit Facility, Maximum Borrowing Capacity $ 4,500   $ 4,500
Debt Instrument, Interest Rate, Stated Percentage 4.25%   4.25%
Line of Credit Facility, Remaining Borrowing Capacity $ 2,400    
Maturity Overnight [Member]      
Federal Home Loan Bank, Advances, Par Value, Total $ 5,000    
Federal Home Loan Bank, Advances, Interest Rate 0.28%