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SEGMENT INFORMATION Long-lived assets by countries (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Oct. 01, 2016
Oct. 03, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets $ 97,589 $ 69,420 $ 58,354
United States [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets 43,440 18,570 7,429
Singapore [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets 31,553 33,286 36,754
China [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets 11,148 7,459 7,386
Israel [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets 4,549 4,810 3,701
All Other Segments [Member]      
Revenues from External Customers and Long-Lived Assets [Line Items]      
Long-Lived Assets $ 6,899 $ 5,295 $ 3,084