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SIGNIFICANT ACCOUNTING POLICIES (Details 5) - Net Sales - Customer Concentration | 12 Months Ended
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Jul. 28, 2018 | Jul. 29, 2017 | Jul. 30, 2016
Low |  |  |
Concentration of Credit Risk |  |  |
Threshold percentage to qualify as major customer | 10.00% |  |
Whole Foods Market |  |  |
Concentration of Credit Risk |  |  |
Sales to major customer (as a percent) | 37.00% | 33.00% | 35.00%

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