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Stockholders' Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jan. 02, 2021 | Dec. 28, 2019 | Dec. 29, 2018
Percentage of fair market value of Commons stock date of grant | 100.00% |  |
Share based payment award number of shares of common stock for each share | 1.5 |  |
Total unrecognized compensation cost related to non-vested share-based compensation arrangements | $ 2,000 |  |
Cost is expected to be recognized over a weighted average period | 2 years 18 days |  |
Weighted-average grant date fair value of the options granted | $ 1.06 | $ 1.65 |
Total intrinsic value of options exercised | $ 0 | $ 0 |
Restricted stock units released, value withheld | $ (30) | $ (156) |
Unvested restricted stock awarded | 557,816 | 443,036 |
Restricted Stock Units (RSUs) |  |  |
Grant of non-qualified stock option | $ 10 |  | $ 40
The intrinsic value of the restricted stock units | $ 2.51 |  |
Number of shares, vested | 128,624 | 222,371 |
Restricted stock units released, intrinsic value | $ 300 |  |
Restricted stock units released, Shares withheld | 14,174 |  |
Restricted stock units released, value withheld | $ 30 |  |
Unvested restricted stock awarded | 371,877 | 295,357 |
Weighted-average grant date fair value of restricted stock awarded | $ 1.90 | $ 2.28 |
2008 Equity Incentive Plan |  |  |
Grant of non-qualified stock option | 3,850,000 |  |
Performance Award | Restricted Stock Units (RSUs) |  |  |
Unvested restricted stock awarded | 0 |  |

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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + 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=120381028&loc=d3e5070-113901 + Details
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