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INCOME TAXES (Net deferred tax balance) (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Oct. 01, 2016
Income Tax Disclosure [Abstract]    
Inventory reserves $ 589 $ 546
Stock options 422 647
Other accruals and reserves 8,230 4,937
Domestic tax credit carryforwards 17,635 8,011
Net operating loss carryforwards 35,937 31,817
Deferred Tax Assets, Gross 62,813 45,958
Valuation allowance (29,614) (27,381)
Total long-term deferred tax asset (1) 33,199 18,577
Repatriation of foreign earnings, including foreign withholding taxes 20,945 20,119
Depreciable assets 11,262 9,333
Total long-term deferred tax liability 32,207 29,452
Deferred Tax Assets, Net 992  
Total net deferred tax liability   (10,875)
Deferred tax asset 27,771 16,822
Deferred tax liability $ 26,779 $ 27,697