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EQUITY INVESTMENTS (Details) - USD ($) $ in Thousands	Mar. 30, 2019		Jan. 30, 2019	Sep. 29, 2018
Equity Method Investments [Abstract]
Non-marketable equity securities	$ 5,000	[1]	$ 5,000	$ 0
Equity method investments	1,301			1,373
Equity investments	$ 6,301			$ 1,373
[1] On January 30, 2019, the Company made a $5.0 million investment in one of our collaborative partners, over which the Company does not have significant influence. During the three and six months ended March 30, 2019, there was no impairment or adjustment to the observable price.

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Equity Method Investments [Abstract]

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI) and investment in equity security without readily determinable fair value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of investment in equity security without readily determinable fair value.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
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