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Income Taxes - Additional Information (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 28, 2019 | Dec. 29, 2018 | Dec. 30, 2017
Income Taxes [Line Items] |  |  |
2017 TCJA provisional tax benefit |  | $ 2,900 | $ 1,700
Statutory federal income tax | 21.00% | 21.00% | 35.00%
Valuation allowance | $ 615 | $ 615 |
Federal |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards | $ 1,000 |  |
Federal | Minimum |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration year | 2025 |  |
Federal | Maximum |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration year | 2027 |  |
State |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards | $ 1,000 |  |
State | Minimum |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration year | 2028 |  |
State | Maximum |  |  |
Income Taxes [Line Items] |  |  |
Operating loss carryforwards, expiration year | 2034 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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