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Customers That Accounted for at Least ten percent of Consolidated Net Revenue (Detail) - Sales Revenue Net - Customer Concentration Risk [Member]
12 Months Ended
Jan. 02, 2016
Jan. 03, 2015
Dec. 31, 2013
U.S. Government      
Concentration Risk [Line Items]      
Concentration risk, percentage 26.00% 32.00% [1]
Seagate Technology      
Concentration Risk [Line Items]      
Concentration risk, percentage 22.00% 15.00% 37.00%
Northrop Grumman Corporation      
Concentration Risk [Line Items]      
Concentration risk, percentage [1] [1] 11.00%
HGST      
Concentration Risk [Line Items]      
Concentration risk, percentage 15.00% 17.00% [1]
[1] Less than 10%