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COMMITMENTS, CONTINGENCIES AND CONCENTRATIONS (Significant customer concentrations as a percentage of total accounts receivable) (Details) (Accounts Receivable [Member], Customer Concentration Risk [Member])
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Haoseng Industrial Co., Ltd [Member]
   
Concentration Risk [Line Items]    
Customer concentrations risk percentage 21.50% 11.90%
Siliconware Precision Industries Co. Limited [Member]
   
Concentration Risk [Line Items]    
Customer concentrations risk percentage   19.50%
STATS ChipPAC Ltd [Member]
   
Concentration Risk [Line Items]    
Customer concentrations risk percentage   14.50%