Note 3 - Earnings Per Share (Details) - Basic and diluted earnings per share (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator:
Income from continuing operations attributable to SPAR Group, Inc. (in Dollars)	$ 331	$ 578	$ 244	$ 1,603
Denominator:
Shares used in basic net income per share calculation	20,503	20,275	20,483	20,175
Effect of diluted securities:
Employee stock options	1,278	1,712	1,225	1,507
Shares used in diluted net income per common share calculation	21,781	21,987	21,708	21,682
Basic net income per common share (in Dollars per share)	$ 0.02	$ 0.03	$ 0.01	$ 0.08
Diluted net income per common share (in Dollars per share)	$ 0.02	$ 0.03	$ 0.01	$ 0.07