COMMITMENTS AND CONTINGENCIES (Details) - USD ($)	12 Months Ended
Sep. 29, 2018	Sep. 30, 2017
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]
Lease Expiration Year	2033
Security Deposit Liability	$ 388,000
Operating Leases, Rent Expense, Net	14,649,000	$ 13,547,000
Operating Leases, Rent Expense, Contingent Rentals	5,454,000	4,420,000
Operating Leases, Future Minimum Payments Due	$ 72,396,000
Sequoia Dc [Member]
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]
Lessee, Operating Lease, Renewal Term	15 years
Lease Expiration Date	Nov. 30, 2032
Operating Leases, Future Minimum Payments Due	$ 1,200,000
Impairment Losses Related to Real Estate Partnerships		$ 283,000
Additional Lease Extension Option [Member] \| Sequoia Dc [Member]
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]
Lessee, Operating Lease, Renewal Term	5 years
Construction [Member] \| Sequoia Dc [Member] \| Leasehold Improvements [Member]
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]
Cost of Goods and Services Sold	$ 11,000,000

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Lease expiration year.

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No definition available.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Impairment losses measured as the amount by which the carrying amount of the business or real estate partnerships exceeds the fair value of the business or partnership.

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Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

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No definition available.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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The increases or decreases in lease payments that result from changes occurring after the inception of the lease in the factors (other than the passage of time) on which lease payments are based, except that any escalation of minimum lease payments relating to increases in construction or acquisition cost of the leased property or for increases in some measure of cost or value during the construction or preconstruction period, are excluded from contingent rentals. Contingent rentals also may include amounts for which the triggering events have not yet occurred or the specified targets for which have not yet been achieved (such as sales based percentage rent), but which events are considered probable of occurring or which specified targets are considered probable of being achieved.

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Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

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This element represents money paid in advance to protect the provider of a product or service, such as a lessor, against damage or nonpayment by the buyer or tenant (lessee) during the term of the agreement. Such damages may include physical damage to the property, theft of property, and other contractual breaches. Security deposits held may be interest or noninterest bearing.

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