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Intangible Assets - Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
Dec. 28, 2019
Dec. 29, 2018
Cost    
Total cost $ 57,399 $ 55,158
Accumulated amortization    
Accumulated amortization (30,148) (27,234)
Total 27,251 27,924
Patents    
Cost    
Total cost 23,242 21,323
Accumulated amortization    
Accumulated amortization (9,251) (8,868)
Customer relationships    
Cost    
Total cost 7,669 7,669
Accumulated amortization    
Accumulated amortization (5,688) (4,921)
Licenses-related party    
Cost    
Total cost 7,500 7,500
Accumulated amortization    
Accumulated amortization (5,984) (5,252)
Acquired technology    
Cost    
Total cost 5,580 5,580
Accumulated amortization    
Accumulated amortization (4,182) (3,624)
Trademarks    
Cost    
Total cost 4,614 4,190
Accumulated amortization    
Accumulated amortization (2,195) (1,889)
Capitalized software development costs    
Cost    
Total cost 3,328 3,430
Accumulated amortization    
Accumulated amortization (2,137) (1,983)
Other    
Cost    
Total cost 5,466 5,466
Accumulated amortization    
Accumulated amortization $ (711) $ (697)