Note 8 - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Aug. 27, 2016	Aug. 29, 2015
Customer Contracts [Member]
Intangible assets acquired	$ 6,088	$ 6,199
Intangible assets acquired, weighted average life in years	14 years 292 days	14 years 328 days
Other Intangible Assets [Member]
Intangible assets acquired	$ 670	$ 1,603
Intangible assets acquired, weighted average life in years	5 years 109 days	5 years 109 days
Goodwill recorded during the period	$ 7,481	$ 10,272
Total intangible assets and goodwill acquired	$ 14,239	$ 18,074