Note 3 - Earnings Per Share (Details) - Basic and Diluted Earnings Per Share - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Numerator:
Net income (loss) attributable to SPAR Group, Inc. (in Dollars)	$ 29	$ 577	$ (46)	$ 208
Denominator:
Weighted average shares used in basic net income per share calculation	20,568	20,613	20,565	20,585
Weighted average shares used in diluted net income per share calculation	21,572	21,709	20,565	21,762
Basic and diluted net income (loss) per common share (in Dollars per share)		$ 0.03		$ 0.01