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Intangible Assets Intangible Assets - Schedule of Finite-Lived Intangible Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Dec. 30, 2017
Finite-Lived Intangible Assets [Line Items]          
Amortization of Intangible Assets $ 1,400 $ 1,000 $ 2,500 $ 2,100  
Total intangible assets 53,214   53,214   $ 51,798
Accumulated amortization (25,235)   (25,235)   (24,675)
Intangible assets, net 27,979   27,979   27,123
Patents          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 19,833   19,833   20,623
Customer relationships          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 7,669   7,669   7,669
Licenses-related party          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 7,500   7,500   7,500
Acquired technology          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 5,580   5,580   5,580
Trademarks          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 4,168   4,168   4,036
Capitalized software development costs          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets 2,998   2,998   2,699
Other          
Finite-Lived Intangible Assets [Line Items]          
Total intangible assets $ 5,466   $ 5,466   $ 3,691