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Note 7 - Servicing (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Servicing Assets at Fair Value [Table Text Block]
   
(in thousands)
  
   
2019
    
2018
    
2017
  
Fair value at beginning of year
   $
1,313
     $
1,270
     $
1,247
  
Capitalized servicing rights – new loan sales
    
192
      
164
      
183
  
Disposals (amortization based on loan payments and payoffs)
    
(186
 )    
(147
 )    
(129
 )
Change in fair value
    
(258
 )    
26
      
(31
 )
Fair value at end of year
   $
1,061
     $
1,313
     $
1,270