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Note 4 - Loans (Details Textual)
$ in Thousands
12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Loans Receivable with Variable Rates of Interest $ 104,261 $ 105,251    
Loans and Leases Receivable, Related Parties, Ending Balance 923 3,884    
Interest Income Forgone on Loans 354 $ 281 $ 383  
Minimum Default Loan Limit To Be Considered For Individually Evaluation Of Impaired Financing Receivable 100      
Financing Receivable, Modifications, Number of Contracts   0 0  
Financing Receivable, Allowance for Credit Loss, Ending Balance 5,264 $ 4,513 $ 4,735 $ 2,334
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 0      
Maximum [Member]        
Loan To Value Ratio 0.80      
Restructured Loans [Member]        
Financing Receivable, Allowance for Credit Loss, Ending Balance $ 116 0    
Paycheck Protection Program Loans [Member ] | Real Estate Loan [Member] | Financial Assets Non Purchased Loans [Member]        
Loans and Leases Receivable Business   5,789    
Paycheck Protection Program Loans [Member ] | Real Estate Loan [Member] | Financial Assets Non Purchased Loans [Member]        
Loans and Leases Receivable Business $ 80      
Consumer Loan [Member] | Maximum [Member]        
Loan To Value Ratio 0.80      
Commercial Real Estate [Member] | Maximum [Member]        
Loan To Value Ratio 0.80      
Commercial Real Estate [Member] | Minimum [Member]        
Loan To Value Ratio 0.50      
Letter of Credit [Member] | Director [Member]        
Commitment to Extend Letter of Credit, Maximum Availability $ 2,275 2,275    
Loans and Leases Receivable, Related Parties, Ending Balance $ 0 $ 0