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Note 1 - Presentation of Interim Information (Details Textual) - USD ($)
$ in Thousands
Jul. 16, 2020
Jun. 30, 2020
Dec. 31, 2019
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total   $ (325) $ 1,137
SBA CARES Act Paycheck Protection Program [Member]      
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total   $ 1,500  
SBA CARES Act Paycheck Protection Program [Member] | Subsequent Event [Member]      
Financing Receivable, before Allowance for Credit Loss, Total $ 45,500    
SBA CARES Act Paycheck Protection Program [Member] | Subsequent Event [Member] | Loans With Two Year Term [Member]      
Financing Receivable, before Allowance for Credit Loss, Total $ 45,000