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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	9 Months Ended
	May 06, 2015	May 07, 2014
Company Owned Restaurants [Member] \| Continuing Operations [Member] \| Fair Value, Inputs, Level 3 [Member]
Continuing Operations
Property and equipment - Fair value measurement	$ 5,043	$ 3,498
Company Owned Restaurants [Member] \| Continuing Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement	5,043	3,498
Property and equipment - Total impairments	(218)	(1,539)
Corporate Assets [Member] \| Discontinued Operations [Member] \| Fair Value, Inputs, Level 2 [Member]
Continuing Operations
Property and equipment - Fair value measurement	660
Corporate Assets [Member] \| Discontinued Operations [Member] \| Fair Value, Inputs, Level 3 [Member]
Continuing Operations
Property and equipment - Fair value measurement	903	1,567
Corporate Assets [Member] \| Discontinued Operations [Member]
Continuing Operations
Property and equipment - Fair value measurement	1,563	1,567
Property and equipment - Total impairments	$ (90)	$ (762)

- 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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