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Note 5 - Loans Receivable and the Allowance for Loan Losses (Details Textual)
12 Months Ended
Dec. 31, 2023
USD ($)
Loan
Contract
Dec. 31, 2022
USD ($)
Loan
Dec. 31, 2021
USD ($)
Accounts Notes And Loans Receivable [Line Items]      
Over drafts reclassified as loans receivables   $ 132,000  
Interest income on non-accrual loans $ 557,000    
Total troubled debt restructuring 0 4,672,000  
Net unearned (fees) costs (238,000) (252,000)  
Financing receivables, impaired, troubled debt restructuring, write-down $ 0 0 $ 0
Financing receivable, modifications, subsequent default, number of contracts | Contract 0    
Loans and leases receivable, impaired, commitment to lend   5,000  
Performing Financial Instruments [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Total troubled debt restructuring   4,301,000  
Nonperforming Financial Instruments [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Total troubled debt restructuring   $ 371,000  
Commercial Portfolio Segment [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Revolving lines of credit $ 77,328,000    
Retail Portfolio Segment [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Revolving lines of credit $ 4,534,000    
Residential Portfolio Segment [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Mortgage loan on real estate number of loan in foreclosure | Loan 0 1  
Mortgage loans in process of foreclosure, amount   $ 120,000  
Residential Portfolio Segment [Member] | Maximum [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Loan to value ratio   80.00%  
Commercial and Industrial [Member] | Commercial Portfolio Segment [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Revolving lines of credit $ 71,886,000    
Residential Buildings and Dwellings [Member] | Credit Concentration Risk [Member] | Commercial Real Estate [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Concentration of loans to lessors percentage of total loans 21.50% 20.00%  
Nonresidential Buildings [Member] | Credit Concentration Risk [Member] | Commercial Real Estate [Member]      
Accounts Notes And Loans Receivable [Line Items]      
Concentration of loans to lessors percentage of total loans 24.70% 22.50%