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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 7,857 5,305
Domestic tax credit carryforwards 17,635 8,011
Net operating loss carryforwards 35,937 31,817
Deferred Tax Assets, Gross 62,440 46,326
Valuation allowance (29,614) (27,381)
Total long-term deferred tax asset 32,826 18,945
Foreign withholding tax on undistributed earnings 20,945 20,119
Fixed and intangible assets 11,262 9,333
Total long-term deferred tax liability 32,207 29,452
Total net deferred tax asset / (liability) 619  
Total net deferred tax asset / (liability)   (10,507)
Deferred tax asset 27,771 16,822
Deferred tax liability $ 27,152 $ 27,329