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Note 4 - Fair Value Measurements (Details) - Non-recurring Fair Value Measurements Related to Impaired Property and Equipment (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 19, 2014	Nov. 20, 2013
Company Owned Restaurants [Member] \| Fair Value, Inputs, Level 3 [Member] \| Continuing Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement	$ 6,446
Company Owned Restaurants [Member] \| Continuing Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement	6,446
Property and equipment - Total impairments
Corporate Assets [Member] \| Fair Value, Inputs, Level 3 [Member] \| Discontinued Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement		1,144
Corporate Assets [Member] \| Discontinued Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement		1,144
Property and equipment - Total impairments

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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