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Note 17 - Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Commitments to Extend Credit [Table Text Block]
(In thousands)   2017   2016
         
Loan commitments:                
Fixed rate   $
933
     $
4,542
  
Adjustable rate    
8,245
      
10,661
  
                 
Standby letters of credit    
1,246
      
1,245
  
Unused lines of credit on credit cards    
5,660
      
5,463
  
Undisbursed commercial and personal lines of credit    
32,302
      
32,125
  
Undisbursed portion of construction loans in process    
25,020
      
19,037
  
Undisbursed portion of home equity lines of credit    
44,494
      
33,490
  
                 
    $
117,900
     $
106,563