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Note 1 - Presentation of Interim Information (Details Textual) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total $ (133) $ 1,137
SBA CARES Act Paycheck Protection Program [Member]    
Financing Receivable, before Allowance for Credit Loss, Total 45,900  
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total 1,300  
SBA CARES Act Paycheck Protection Program [Member] | Loans With Two Year Term [Member]    
Financing Receivable, before Allowance for Credit Loss, Total $ 44,800