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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]      
Reserve for product warranty, beginning of period $ 1,194 $ 2,412 $ 2,245
Provision for product warranty 2,099 1,093 3,521
Product warranty costs paid (1,751) (2,311) (3,354)
Reserve for product warranty, end of period $ 1,542 $ 1,194 $ 2,412