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Note 5 - Allowance for Loan Losses, Nonperforming Assets and Impaired Loans - Restructurings By Class (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
Number of contracts 3 0
Pre-modification outstanding principal balance $ 2,826  
Post-modification outstanding principal balance [1] $ 2,826  
Commercial Real Estate Portfolio Segment [Member]    
Number of contracts 1  
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate, Owner Occupied [Member]    
Number of contracts 1  
Pre-modification outstanding principal balance $ 102  
Post-modification outstanding principal balance [1] $ 102  
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate Other [Member]    
Number of contracts 2  
Pre-modification outstanding principal balance $ 2,724  
Post-modification outstanding principal balance $ 2,724  
[1] Post-modification outstanding recorded investment considers amounts immediately following the modification. Amounts do not reflect balances at the end of the period.