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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. 03, 2020 | Dec. 28, 2018 | Dec. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | $ 10,547 | $ 6,762 | $ 3,161
Amounts capitalized as part of inventory | 1,017 | 637 | 372
Total stock-based compensation expense, gross | 11,564 | 7,399 | 3,533
Cost of Sales |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 52 | 15 | 8
General and Administrative |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 4,010 | 2,635 | 1,487
Marketing and Selling |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | 3,318 | 1,805 | 805
Research and Development Expense |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense, net | $ 3,167 | $ 2,307 | $ 861

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