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Note 2 - Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
For the Three Months Ended March 31,
  
   
20
20
    
20
19
  
Net Income
   $
432,000
     $
413,000
  
                 
Weighted average shares outstanding – basic
    
1,964,132
      
1,940,363
  
Effect of dilutive common stock equivalents
    
67,362
      
51,416
  
Adjusted weighted average shares outstanding – diluted
    
2,031,494
      
1,991,779
  
                 
Basic earnings per share
   $
0.22
     $
0.21
  
Diluted earnings per share
   $
0.21
     $
0.21