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Note 5 - Other Real Estate Owned (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Other Real Estate Assets Acquired in Foreclosure Roll Forward [Table Text Block]
   
December
31, 2017
  
   
Bank
    
ALC
    
Total
  
   
(Dollars in Thousands)
  
Beginning balance
   $
4,353
     $
505
     $
4,858
  
Transfers from loans
    
—
      
87
      
87
  
Sales proceeds
    
(649
)
    
(199
)
    
(848
)
Gross gains
    
14
      
—
      
14
  
Gross losses
    
(20
)
    
(101
)
    
(121
)
Net gains (losses)
    
(6
)
    
(101
)
    
(107
)
Impairment
    
(171
)
    
(27
)
    
(198
)
Ending balance
   $
3,527
     $
265
     $
3,792
  
   
December 31, 2016
  
   
Bank
    
ALC
    
Total
  
   
(Dollars in Thousands)
  
Beginning balance
   $
5,327
     $
711
     $
6,038
  
Transfers from loans
    
273
      
199
      
472
  
Sales proceeds
    
(1,016
)
    
(281
)
    
(1,297
)
Gross
gains
    
16
      
37
      
53
  
Gross losses
    
(77
)
    
(80
)
    
(157
)
Net gains (losses)
    
(61
)
    
(43
)
    
(104
)
Impairment
    
(170
)
    
(81
)
    
(251
)
Ending balance
   $
4,353
     $
505
     $
4,858