Note 11 - Impairment of Long-Lived Assets, Store Closings, Discontinued Operations and Property Held for Sale (Details) - Assets and Liabilities for All Discontinued Operations - USD ($) $ in Thousands	Aug. 26, 2015	Aug. 27, 2014	Aug. 28, 2013	Aug. 29, 2012
Note 11 - Impairment of Long-Lived Assets, Store Closings, Discontinued Operations and Property Held for Sale (Details) - Assets and Liabilities for All Discontinued Operations [Line Items]
Assets related to discontinued operations—current	$ 24	$ 52
Property and equipment	4,536	991	$ 449	$ 602
Assets related to discontinued operations—non-current	4,014	4,204
Liabilities related to discontinued operations—current	417	590
Liabilities related to discontinued operations—non-current	190	278
Discontinued Operations [Member]
Note 11 - Impairment of Long-Lived Assets, Store Closings, Discontinued Operations and Property Held for Sale (Details) - Assets and Liabilities for All Discontinued Operations [Line Items]
Prepaid expenses	24	52
Assets related to discontinued operations—current	24	52
Property and equipment	2,211	2,817
Other assets	1,803	1,387
Assets related to discontinued operations—non-current	4,014	4,204
Deferred income taxes	343	308
Accrued expenses and other liabilities	74	282
Liabilities related to discontinued operations—current	417	590
Other liabilities	190	278
Liabilities related to discontinued operations—non-current	$ 190	$ 278