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Note 13 - Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Year ended December 31,
(in thousands, except per share data)
  
201
9
    
201
8
  
Basic
 
 
 
 
  
 
 
 
Net income attributable to Intelligent Systems Corporation
   $
10,969
     $
6,244
  
Weighted average common shares outstanding
    
8,873
      
8,796
  
Earnings per share
   $
1.24
     $
0.71
  
                 
Diluted
 
 
 
 
  
 
 
 
Net income attributable to Intelligent Systems Corporation
   $
10,969
     $
6,244
  
Weighted average common shares outstanding
    
8,873
      
8,796
  
Effect of dilutive potential common shares: stock options
    
95
      
152
  
Total
    
8,968
      
8,948
  
Earnings per share
   $
1.22
     $
0.70