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Stockholders' Equity - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jul. 02, 2021 | Jul. 03, 2020 | Jul. 02, 2021 | Jul. 03, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total stock-based compensation expense, net | $ 3,992 | $ 2,918 | $ 7,322 | $ 5,839
Amounts capitalized as part of inventory | 390 | 291 | 699 | 560
Total stock-based compensation expense, gross | 4,382 | 3,209 | 8,021 | 6,399
Cost of Sales |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total stock-based compensation expense, net | 54 | 30 | 89 | 52
General and Administrative |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total stock-based compensation expense, net | 1,815 | 1,209 | 3,254 | 2,294
Selling and Marketing |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total stock-based compensation expense, net | 953 | 812 | 1,786 | 1,867
Research and Development Expense |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Total stock-based compensation expense, net | $ 1,170 | $ 867 | $ 2,193 | $ 1,626

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