BASIS OF PRESENTATION and ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 24, 2019	Jan. 25, 2020	Jan. 26, 2019	Jan. 25, 2020	Jan. 26, 2019	Jul. 28, 2019	Jul. 27, 2019
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		97,795		97,795
Operating lease liability		110,164		110,164
Cumulative adjustment						$ 3,514
Financing obligations		(23,856)		(23,856)
Net assets for leases		(231,322)		(231,322)			$ (224,890)
Rent expense		$ 677		$ 1,354
Depreciation expense related to leases			$ 107		215
Interest expense related to leases			$ 537		$ 1,077
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]
Payment for acquisition, net of cash acquired	$ 5,203
Goodwill	$ 529