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Note 4 - Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
 
 
Three Months Ended
March 31
,
 
 
 
20
17
 
 
20
16
 
Numerator:
                
Net loss attributable to SPAR Group, Inc.
 
$
(244
)
   $
(139
 )
                 
Denominator:
                
Weighted average shares used in basic and diluted net income per share calculation
 
 
20,649
 
    
20,563
  
                 
                 
Basic and diluted net loss per common share
 
$
(0.01
)
 
$
(0.01
)