Note 3 - Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net (loss) income attributable to SPAR Group, Inc.	$ (92)	$ 383	$ (137)	$ 590
Weighted average shares used in basic net income per share calculation (in shares)	20,556	20,584	20,562	20,585
Weighted average shares used in diluted net income per share calculation (in shares)	20,556	21,525	20,562	21,687
Basic and diluted net (loss) income per common share (in dollars per share)		$ 0.02	$ (0.01)	$ 0.03