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Note 2 - Earnings Per Share (Tables)
 9 Months Ended
Sep. 30, 2020
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,
  
   
20
20
    
201
9
    
20
20
    
201
9
  
Net Income
   $
1,008,000
     $
802,000
     $
2,171,000
     $
1,880,000
  
                                 
Weighted average shares outstanding – basic
    
1,982,697
      
1,966,003
      
1,975,111
      
1,953,367
  
Effect of dilutive common stock equivalents
    
28,118
      
45,572
      
35,537
      
46,427
  
Adjusted weighted average shares outstanding – diluted
    
2,010,815
      
2,011,575
      
2,010,648
      
1,999,794
  
                                 
Basic earnings per share
   $
0.51
     $
0.41
     $
1.10
     $
0.96
  
Diluted earnings per share
   $
0.50
     $
0.40
     $
1.08
     $
0.94