Note 17 - 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]
 
 
Contractual Amount
 
 
 
2016
 
 
2015
 
Commitments to extend credit:
                
Unused portion of commercial lines of credit
 
$
75,454
 
   $
70,488
 
Unused portion of credit card lines of credit
 
 
4,983
 
    
4,396
 
Unused portion of home equity lines of credit
 
 
25,057
 
    
23,164
 
Standby letters of credit and financial guarantees written
 
 
1,582
 
    
1,555