BASIS OF PRESENTATION and ACCOUNTING POLICIES (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jun. 24, 2019 USD ($) store	Apr. 25, 2020 USD ($)	Apr. 27, 2019 USD ($)	Apr. 25, 2020 USD ($)	Apr. 27, 2019 USD ($)	Jul. 28, 2019 USD ($)	Jul. 27, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Payment for acquisition, net of cash acquired				$ (64)	$ 0
Goodwill		$ 12,586		12,586			$ 12,650
Operating lease assets		94,838		94,838
Operating lease liability		107,183		107,183
Cumulative adjustment						$ 3,514
Financing obligations		(23,695)		(23,695)
Net assets for leases		(230,886)		(230,886)			$ (224,890)
Rent expense		$ 677		$ 2,031
Depreciation expense related to leases			$ 91		305
Interest expense related to leases			$ 535		$ 1,612
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease assets						99,415
Operating lease liability						111,139
Cumulative adjustment						3,514
Financing obligations						17,442
Net assets for leases						$ 12,543
Gourmet Garage Specialty Markets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Number of stores | store	3
Payment for acquisition, net of cash acquired	$ 5,203
Goodwill	529
Trade name intangible asset	$ 1,485