BASIS OF PRESENTATION and ACCOUNTING POLICIES Revenue Recognition (Details)	3 Months Ended
Oct. 27, 2018 USD ($)
Cost of Sales [Member]
Revenue from External Customer [Line Items]
Prior Period Reclassification Adjustment	$ 47,000
Operating Expense [Member]
Revenue from External Customer [Line Items]
Prior Period Reclassification Adjustment	$ 913,000

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration