Note 11 - Impairment of Long-Lived Assets, Discontinued Operations and Property Held for Sale (Details) - Impairment Charges to Income From Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended												4 Months Ended				12 Months Ended
	May 08, 2013		Feb. 13, 2013		Nov. 21, 2012		May 09, 2012		Feb. 15, 2012		Nov. 23, 2011		Aug. 31, 2013		Aug. 29, 2012		Aug. 28, 2013	Aug. 29, 2012	Aug. 31, 2011
Note 11 - Impairment of Long-Lived Assets, Discontinued Operations and Property Held for Sale (Details) - Impairment Charges to Income From Operations [Line Items]
Provision for asset impairments																	$ 615	$ 451	$ 84
Net loss (gain) on disposition of property and equipment																	(1,723)	278	(1,574)
																	$ (1,108)	$ 729	$ (1,490)
Effect on EPS:
Basic (in Dollars per share)	$ 0.09	[1]	$ 0.01	[1]	$ 0.01	[1]	$ 0.09	[1]	$ 0.04	[1]	$ 0.01	[1]	$ 0.02	[1]	$ 0.11	[1]	$ 0.11	$ 0.24	$ 0.10
Assuming dilution (in Dollars per share)																	$ 0.04	$ (0.03)	$ 0.05
Dispostion of Property Plant and Equipment Impairment [Member]
Effect on EPS:
Basic (in Dollars per share)																	$ 0.04	$ (0.03)	$ 0.05

[1] The quarters ended August 28, 2013 and August 29, 2012 consists of four four-week periods. All other quarters presented represent three four-week periods.