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Stock-Based Compensation - Schedule of non-vested PSU activity (Details) - Performance stock units ("PSUs") [Member] - $ / shares |  | 12 Months Ended
--- | --- | ---
Sep. 03, 2019 | Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward] |  |  |  |
Non-vested, beginning of year |  | 1,361,896 |  |
Granted |  | 2,846,962 |  | 1,560,535
Forfeited |  | (1,272,743) |  |
Non-vested, end of year |  | 2,936,115 | 1,361,896 |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] |  |  |  |
Non-vested, beginning of year |  | $ 5.60 |  |
Granted | $ 0.79 | 3.42 | $ 3.42 | $ 5.64
Forfeited |  | 4.23 |  |
Non-vested, end of year |  | $ 4.08 | $ 5.60 |

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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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- 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=116856206&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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- Details
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