Impairment of Long-Lived Assets, Discontinued Operations, Property Held for Sale and Store Closings - Assets and Liabilities for All Discontinued Operations (Details) - USD ($) $ in Thousands	Mar. 11, 2020	Aug. 28, 2019	Aug. 29, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property and equipment	$ 13,770	$ 16,488
Assets related to discontinued operations—non-current	1,813	1,813
Liabilities related to discontinued operations—current	5	$ 14
Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Property and equipment	1,813		$ 1,813
Assets related to discontinued operations—non-current	1,813		1,813
Accrued expenses and other liabilities	5		14
Liabilities related to discontinued operations—current	$ 5		$ 14

Amount classified as accrued liabilities attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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