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BALANCE SHEET COMPONENTS (Narrative) (Details) - USD ($) $ in Thousands		Dec. 30, 2017	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Severance	[1]	$ 3,555	$ 3,828
Chief Financial Officer [Member] | CFO Severance [Member]
Restructuring Cost and Reserve [Line Items]
Severance		$ 1,200
[1] Includes the restructuring plan discussed in Note 2, severance payable in connection with the November 2017 departure of the Company's CFO of $1.2 million, and other severance payments.

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Liability for amount due employees, in addition to wages and any other money that employers owe employees, when their employment ends through a layoff or other termination. For example, a company may provide involuntarily terminated employees with a lump sum payment equal to one week's salary for every year of employment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Postemployment Benefits
-URI http://asc.fasb.org/extlink&oid=6519534

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