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Stockholders' Equity and Share-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Aug. 18, 2020 | Jan. 01, 2022 | Jan. 02, 2021 | Dec. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Net proceeds from issuance of common stock |  |  | $ 60,461 |
Compensation costs |  | $ 778 |  |
Amounts capitalized to internally-developed software |  | 6,334 | 4,769 | $ 4,907
Website and Software Development |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Amounts capitalized to internally-developed software |  | 2,159 | 659 | 55
Public equity offering |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Issuance of common stock, net of underwriters' offering expenses and commissions (in shares) | 4,000 |  |  |
Offering price (in dollars per share) | $ 13.00 |  |  |
Net proceeds from issuance of common stock | $ 48,831 |  |  |
Over-Allotment Option |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Issuance of common stock, net of underwriters' offering expenses and commissions (in shares) | 900 |  |  |
Net proceeds from issuance of common stock | $ 11,700 |  |  |
Period of underwriters option | 30 days |  |  |
Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation costs |  | 15,779 |  |
Stock options and Restricted stock units |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation costs |  | $ 15,685 | $ 7,778 | $ 3,656

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