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Note 14 - Financial Instruments With Off-balance Sheet Risk (Tables)
 12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Commitment to Extended Credit [Table Text Block]
(In thousands)
  
 
 
 
  
 
 
 
   
As of December 31,
 
   
2017
    
2016
  
Commitments to extend credit:
  
 
 
 
  
 
 
 
Unused lines of credit
   $
63,760
      
39,063
  
Undisbursed construction loans
    
7,930
      
21,224
  
Home equity lines of credit
    
19,727
      
20,846
  
Future loan commitments
    
24,675
      
15,755
  
Financial standby letters of credit
    
1,133
      
1,482
  
    $
117,225
      
98,370