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Note 2 - Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended
June 30,
    
For the Six Months Ended
June 30,
  
   
20
20
    
201
9
    
20
20
    
201
9
  
Net Income
   $
731,000
     $
665,000
     $
1,163,000
     $
1,078,000
  
                                 
Weighted average shares outstanding – basic
    
1,978,421
      
1,953,452
      
1,971,276
      
1,946,944
  
Effect of dilutive common stock equivalents
    
24,738
      
48,238
      
40,567
      
46,815
  
Adjusted weighted average shares outstanding – diluted
    
2,003,159
      
2,001,690
      
2,011,843
      
1,993,759
  
                                 
Basic earnings per share
   $
0.37
     $
0.34
     $
0.59
     $
0.55
  
Diluted earnings per share
   $
0.36
     $
0.33
     $
0.58
     $
0.54