Note 2 - Acquisitions (Details) - Acquisitions $ in Thousands	12 Months Ended
	Aug. 29, 2015 USD ($)	Aug. 30, 2014 USD ($)	Aug. 31, 2013 USD ($)
Acquisitions [Abstract]
Number of businesses acquired	7	7	7
Tangible assets acquired	$ 4,179	$ 949	$ 7,494
Intangible assets and goodwill acquired	18,190	2,686	23,326
Liabilities assumed	(10)		(106)
Acquisition of businesses	$ 22,359	$ 3,635	$ 30,714