Note 3 - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net income (loss) attributable to SPAR Group, Inc.	$ 283	$ 29	$ 143	$ (46)
Weighted average common shares – basic (in shares)	20,569	20,568	20,566	20,565
Weighted average common shares – diluted (in shares)	21,328	21,572	21,331	20,565
Basic and diluted income per common share: (in dollars per share)	$ 0.01		$ 0.01