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Note 13 - Net Income Per Share (Tables)
12 Months Ended
Dec. 31, 2020
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
   
Year Ended December 31,
 
   
2020
   
2019
 
Numerator:
               
Net income attributable to SPAR Group, Inc.
  $
3,367
    $
2,419
 
                 
Denominator:
               
Shares used in basic net income per share calculation    
21,110
     
20,916
 
Effect of diluted securities:
               
Stock options and unvested restricted shares
   
45
     
241
 
Shares used in diluted net income per share calculations
   
21,155
     
21,157
 
                 
Basic net income per common share:   $
0.16
    $
0.12
 
Diluted net income per common share:
  $
0.16
    $
0.11