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Intangible Assets Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
Jul. 04, 2015
Jan. 03, 2015
Finite-Lived Intangible Assets [Line Items]    
Total cost $ 42,961 $ 40,786
Total accumulated amortization (14,925) (13,015)
Intangible assets, net 28,036 27,771
Patents    
Finite-Lived Intangible Assets [Line Items]    
Total cost 21,081 20,459
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Total cost 7,669 7,669
Acquired technology    
Finite-Lived Intangible Assets [Line Items]    
Total cost 5,580 5,580
Trademarks    
Finite-Lived Intangible Assets [Line Items]    
Total cost 3,772 3,562
Capitalized software development costs    
Finite-Lived Intangible Assets [Line Items]    
Total cost 2,332 2,066
Other    
Finite-Lived Intangible Assets [Line Items]    
Total cost $ 2,527 $ 1,450