Note 14 - Net Income Per Share (Details) - Basic and Diluted Earnings Per Share (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income attributable to SPAR Group, Inc. (in Dollars)	$ 3,268	$ 3,350
Denominator:
Shares used in basic net income per share calculation	20,578	20,490
Effect of diluted securities:
Stock options and unvested restricted shares	1,252	1,244
Shares used in diluted net income per share calculations	21,830	21,734
Basic net income per common share: (in Dollars per share)	$ 0.16	$ 0.16
Diluted net income per common share: (in Dollars per share)	$ 0.15	$ 0.15