SEGMENT INFORMATION Sales by country (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Oct. 03, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 27, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net	$ 119,172	$ 164,634	$ 145,227	$ 107,438	$ 194,733	$ 180,517	$ 114,206	$ 79,113	$ 536,471	$ 568,569	$ 534,938
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									169,557	144,134	124,272
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									56,610	140,586	150,271
Malaysia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									48,825	46,033	23,799
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									31,413	34,480	17,680
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									47,220	31,645	14,652
Philippines [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									42,575	31,371	30,257
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									40,687	31,284	36,949
Hong Kong [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									15,482	23,709	28,911
Singapore [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									17,430	21,934	35,833
Vietnam [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									4,354	11,355	4,639
Thailand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									13,852	9,386	9,143
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									11,580	8,496	5,822
All Other Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue, Net									$ 36,886	$ 34,156	$ 52,710