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Note 9 - Allowance for Loan Losses and Credit Quality Information (Details Textual)
$ in Thousands
3 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest $ 4,536   $ 4,621  
Impaired Financing Receivable, Related Allowance 442   406  
Loan Receivable for Which Value of Collateral Sufficient to Repay 900   900  
Financing Receivable, Troubled Debt Restructuring $ 997   1,051  
Financing Receivable, Modifications, Number of Contracts 1 2    
Financing Receivable, Troubled Debt Restructuring, Subsequent Default $ 0 $ 0    
Financing Receivable, Troubled Debt Restructuring, Reserves $ 200   $ 200  
Percentage Reserves For Loan Losses On Troubled Debt Restructurings 2.40%   2.60%  
Loans and Leases Receivable, Allowance $ 9,584 10,132 $ 9,279 $ 10,699
Financing Receivable, Deferred Loans with Granted Loan Modifications 0 $ 34,500    
Nonperforming Financial Instruments [Member]        
Impaired Financing Receivable, Related Allowance 400   400  
Financing Receivable, Troubled Debt Restructuring 974   1,022  
Nonperforming Financial Instruments [Member] | Classified [Member]        
Financing Receivable, Troubled Debt Restructuring 200      
Performing Financial Instruments [Member]        
Financing Receivable, Troubled Debt Restructuring $ 23   $ 29  
Performing Financial Instruments [Member] | Classified [Member]        
Financing Receivable, Modifications, Number of Contracts 0