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Note 8 - Loans & Allowance for Loan Losses (Details Textual)
3 Months Ended
Mar. 31, 2023
USD ($)
Contract
Loan
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Accounts Notes And Loans Receivable [Line Items]      
Total troubled debt restructuring $ 4,557,000   $ 4,672,000
Over drafts reclassified as loans receivables     132,000
Net unearned (fees) costs (196,000)   (252,000)
Loans and leases receivable, impaired, commitment to lend 7,000   5,000
Financing receivables, impaired, troubled debt restructuring, write-down $ 0 $ 0  
Financing receivable, modifications, subsequent default, number of contracts | Contract 0    
Interest income on non-accrual loans $ 14,000    
Performing Financial Instruments [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Total troubled debt restructuring 4,224,000   4,301,000
Nonperforming Financial Instruments [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Total troubled debt restructuring $ 333,000   $ 371,000
Residential Portfolio Segment [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Mortgage loan on real estate number of loan in foreclosure | Loan 1    
Mortgage loans in process of foreclosure, amount $ 116,000    
Residential Portfolio Segment [Member] | Maximum [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Loan to value ratio 80.00%