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Stockholders' Equity - Schedule of Compensation Cost (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 | $ 10,547 | $ 6,762 | $ 3,161
Employee Stock Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense | 8,144 | 4,013 | 1,731
Restricted Stock |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense | 320 | 274 | 186
Restricted Stock Units (RSUs) |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense | 1,905 | 2,120 | 1,226
Non Employee Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |
Total stock-based compensation expense | $ 178 | $ 355 | $ 18

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