Note 13 - Purchase of Interest in Subsidiaries (Detail) - The effects of the above transactions on the net income attributed to the Company and transfers from the non-controlling interest (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Net income attributed to SPAR Group, Inc.	$ 2,930	$ 2,214
Increase/(Decrease) in SPAR Group, Inc. paid in capital for sale/purchase of subsidiaries common stock	164	(159)
Change from net income attributed to SPAR Group, Inc. and transfer from/to non-controlling interest	$ 3,094	$ 2,055