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Amounts Recognized in Consolidated Financial Statements of Operations with Respect to Stock Based Compensation Plan (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 27, 2021
Sep. 28, 2020
Sep. 27, 2021
Sep. 28, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized $ 4,944 $ 4,479 $ 12,503 $ 11,961
Cost of goods sold        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized 1,284 1,173 3,310 2,643
Selling and marketing        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized 731 557 1,819 1,299
General and administrative        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized 2,542 2,705 6,912 7,872
Research and development        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense recognized $ 387 $ 44 $ 462 $ 147