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Note 5 - Loans Held for Sale (Details Textual) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance $ 18,000,000 $ 15,300,000
Loans Serviced By Entity But Owned By a Third Party 13,500,000 13,600,000
Servicing Asset, Total 198,000  
Servicing Asset at Fair Value, Amount, Ending Balance 272,000  
Commercial Portfolio Segment [Member]    
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance 11,700,000 10,200,000
Commercial Real Estate Portfolio Segment [Member]    
Financing Receivable, Held-for-Sale, Not Part of Disposal Group, after Valuation Allowance, Ending Balance $ 6,300,000 $ 5,100,000