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Note 5 - Loans Held for Sale (Details Textual) - USD ($)
6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance $ 7,600,000 $ 15,300,000
Real Estate Owned, Transfer to Real Estate Owned 8,000,000  
Loans Serviced By Entity But Owned By a Third Party 14,900,000 13,600,000
Servicing Asset, Total 221,000  
Servicing Asset at Fair Value, Amount, Ending Balance 283,000  
Commercial Portfolio Segment [Member]    
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance 2,800,000 10,200,000
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance $ 4,800,000 $ 5,100,000