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Stock-Based Compensation - Schedule of non-vested RSU activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares |  |  | 12 Months Ended
--- | --- | --- | ---
Sep. 03, 2019 | Apr. 01, 2019 | Jan. 01, 2022 | Jan. 02, 2021 | Dec. 28, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |  |
Non-vested, beginning of year |  |  | 647,299 |  |
Granted |  |  | 245,848 |  |
Vested |  |  | (285,554) |  |
Forfeited |  |  | (101,582) |  |
Non-vested, end of year |  |  | 506,011 | 647,299 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |  |
Non-vested, beginning of year |  |  | $ 3.39 |  |
Granted | $ 1.18 | $ 1.68 | 13.32 | $ 3.20 | $ 3.33
Vested |  |  | 3.93 |  |
Forfeited |  |  | 3.78 |  |
Non-vested, end of year |  |  | $ 7.71 | $ 3.39 |

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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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Period Type: | duration

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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Number of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
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- Details
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