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FAIR VALUE MEASUREMENTS (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jul. 01, 2016 | Sep. 28, 2018 | Sep. 29, 2017 | Sep. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment losses |  | $ 0 | $ 0 | $ 6,197,000
Goodwill |  | 11,199,000 | 11,238,000 | 11,196,000
Diving |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Impairment losses | $ 6,197,000 |  | 6,197,000 |
Goodwill |  | 0 | 0 | $ 0
Nonrecurring |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Assets, fair value disclosure, nonrecurring |  | 0 | 0 |
Liabilities, fair value disclosure, nonrecurring |  | $ 0 | $ 0 |

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
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