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Note 12 - Commitments and Contingent Liabilities (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2020
Jan. 01, 2020
Dec. 31, 2019
Dec. 31, 2017
Loan Commitments, Not Unconditionally Cancellable   $ 37,456      
Unfunded Loan Commitments   277,878   $ 265,311  
Guarantor Obligations, Current Carrying Value   580   550  
Reserve for Unfunded Commitments     $ 2,160    
Other Liabilities [Member]          
Reserve for Unfunded Commitments   101   2,160  
Financial Standby Letter of Credit [Member]          
Letters of Credit Outstanding, Amount   2,357   3,099  
Commercial Standby Letters of Credit [Member]          
Letters of Credit Outstanding, Amount   0   $ 0  
Customer Refunds [Member]          
Loss Contingency Accrual, Ending Balance $ 5,843 1,433     $ 5,542
Loss Contingency Accrual, Period Increase (Decrease), Total $ 301        
Loss Contingency Accrual, Payments   $ 4,410