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Note 14 - Financial Instruments with Off-Balance Sheet Risk (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block]
   
December
31,
  
   
20
16
    
20
15
  
Financial instruments whose contract amounts represent credit risk:
                
Commitments to extend credit
  
$
130,252
     $
125,934
  
Standby letters of credit
  
 
20,499
      
15,248
  
Mortgage loans sold with potential recourse
  
 
17,526
      
17,571