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Stockholders' Equity - Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jan. 01, 2021 | Jan. 03, 2020 | Dec. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | $ 12,146 | $ 10,547 | $ 6,762
Amounts capitalized as part of inventory | 1,129 | 1,017 | 637
Total stock-based compensation expense, gross | 13,275 | 11,564 | 7,399
Cost of Sales |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 112 | 52 | 15
General and Administrative |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 4,925 | 4,010 | 2,635
Marketing and Selling |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 3,471 | 3,318 | 1,805
Research and Development Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | $ 3,638 | $ 3,167 | $ 2,307

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