SEGMENT INFORMATION Sales by country (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Oct. 03, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 145,844	$ 216,414	$ 156,400	$ 108,534	$ 119,172	$ 164,634	$ 145,227	$ 107,438	$ 627,192	$ 536,471	$ 568,569
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									211,448	169,557	144,134
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									129,128	56,610	140,586
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									42,368	48,825	46,033
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									28,256	31,413	34,480
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									47,806	47,220	31,645
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									8,272	42,575	31,371
HUNGARY
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									5,436	4,350	1,235
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									70,593	40,687	31,284
Hong Kong [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									8,625	15,482	23,709
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									8,770	17,430	21,934
Vietnam [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									3,785	4,354	11,355
Thailand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									11,782	13,852	9,386
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									13,043	11,580	8,496
All Other Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									$ 37,880	$ 32,536	$ 32,921