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Note 2 - Accounting Policies (Details Textual) - USD ($)
Sep. 30, 2019
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Loans Receivable Held-for-sale, Amount $ 4,103,000    
Loans Serviced By Entity But Owned By a Third Party 13,100,000      
Servicing Asset at Amortized Cost, Ending Balance 196,000 $ 156,000   $ 37,000
Servicing Asset at Amortized Cost, Fair Value 276,000      
Operating Lease, Right-of-Use Asset 3,267,000      
Operating Lease, Liability, Total 3,364,000      
Accounting Standards Update 2016-02 [Member]        
Operating Lease, Right-of-Use Asset     $ 3,400,000  
Operating Lease, Liability, Total     $ 3,400,000  
Commercial Real Estate Portfolio Segment [Member]        
Loans Receivable Held-for-sale, Amount 2,900,000      
Commercial Portfolio Segment [Member]        
Loans Receivable Held-for-sale, Amount $ 1,200,000