Note 14 - Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Net income attributable to SPAR Group, Inc.	$ 892	$ 3,268
Shares used in basic net income per share calculation (in shares)	20,559	20,578
Stock options and unvested restricted shares (in shares)	1,014	1,252
Shares used in diluted net income per share calculations (in shares)	21,573	21,830
Basic net income per common share: (in dollars per share)	$ 0.04	$ 0.16
Diluted net income per common share: (in dollars per share)	$ 0.04	$ 0.15