SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Reconciliation of Cash, Cash Equivalents and Restricted Cash (Details) $ in Thousands	2 Months Ended	3 Months Ended	6 Months Ended
Dec. 31, 2018 USD ($) operating_segment	Dec. 31, 2018 USD ($) reporting_segment	Jun. 29, 2019 USD ($)	Apr. 29, 2018 USD ($)	Jun. 29, 2019 USD ($)	Apr. 29, 2018 USD ($)	Oct. 28, 2018 USD ($)	Oct. 29, 2017 USD ($)
Accounting Policies [Abstract]
Number of reportable segments	3	3
Loss on disposition of business			$ 0	$ 6,686	$ 0	$ 6,686
Cash and cash equivalents			87,496		87,496		$ 54,272
Restricted cash			3,989		3,989
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	$ 147,607	$ 147,607	$ 91,485	$ 35,512	$ 91,485	$ 35,512		$ 65,794

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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