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Note 8 - Other Real Estate Owned (OREO) (Tables)
 12 Months Ended
Dec. 31, 2018
Notes Tables  
Other Real Estate, Roll Forward [Table Text Block]
(Amounts in thousands)
  
Years Ended December 31,
  
OREO
  
2018
    
2017
    
2016
  
Balance at beginning of year
   $
35
     $
759
     $
1,423
  
Additions
    
140
      
1,071
      
189
  
Dispositions
    
(144
 )    
(1,743
 )    
(745
 )
Valuation adjustments
    
—
      
(52
 )    
(108
 )
Total
   $
31
     $
35
     $
759