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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Reserve for product warranty activity) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Apr. 02, 2016
Mar. 28, 2015
Apr. 02, 2016
Mar. 28, 2015
Movement in Standard and Extended Product Warranty, Increase (Decrease) [Roll Forward]        
Reserve for product warranty, beginning of period $ 1,617 $ 1,215 $ 1,856 $ 1,542
Addition from business combination 0 547 0 547
Provision for product warranty 972 1,038 1,358 1,237
Product warranty costs paid (718) (951) (1,343) (1,477)
Reserve for product warranty, end of period $ 1,871 $ 1,849 $ 1,871 $ 1,849