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Note 2 - Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended
September
30,
    
For the
Nine
Months Ended
September
30,
  
   
201
8
    
201
7
    
201
8
    
201
7
  
Net Income
   $
658,000
     $
595,000
     $
1,481,000
     $
1,290,000
  
                                 
Weighted average shares outstanding – basic
    
1,945,553
      
1,868,969
      
1,916,817
      
1,857,682
  
Effect of dilutive common stock equivalents
    
70,984
      
138,850
      
61,700
      
140,456
  
Adjusted weighted average shares outstanding – diluted
    
2,016,537
      
2,007,819
      
1,978,517
      
1,998,138
  
                                 
Basic earnings per share
   $
0.34
     $
0.32
     $
0.77
     $
0.69
  
Diluted earnings per share
   $
0.33
     $
0.30
     $
0.75
     $
0.65