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Note 16 - Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Years Ended December 31,
 
   
2016
    
2015
    
2014
  
                   
(As restated)
  
Net income-(numerator)
   $
6,961,262
    $
4,683,213
    $
4,089,622
 
                         
Weighted average shares outstanding
for basic EPS-(denominator)
    
9,493,700
     
9,521,392
     
9,619,124
 
Dilutive effect of stock options and restricted stock awards
    
29,065
     
21,009
     
19,034
 
Adjusted shares for diluted EPS
    
9,522,765
     
9,542,401
     
9,638,158
 
                         
Net income per common share
                        
Basic
   $
0.73
    $
0.49
    $
0.43
 
Diluted
   $
0.73
    $
0.49
    $
0.42