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Income Taxes - Additional Information (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Oct. 02, 2020 | Sep. 27, 2019 | Oct. 02, 2020 | Sep. 27, 2019
Income Taxes [Line Items] |  |  |  |
Income tax expense | $ 1,489,000 | $ 760,000 | $ 887,000 | $ 2,380,000
Reversal of valuation allowance | 154,000 |  |  |
Unrecognized tax benefits related to uncertain tax positions | 0 |  | $ 0 |
Percentage of deduction in GILTI |  |  | 50.00% |
Valuation allowance, deferred tax asset, increase (decrease), amount |  |  | $ 4,591,000 |
Valuation allowance, deferred tax asset, increase (decrease), amount, COVID effect |  |  | 1,215,000 |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 136,000 |  | 136,000 |
US |  |  |  |
Income Taxes [Line Items] |  |  |  |
Deferred tax assets, valuation allowance | 35,745,000 |  | 35,745,000 |
Deferred Tax Assets, Net | 4,727,000 |  | 4,727,000 |
Federal |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance, deferred tax asset, increase (decrease), amount |  |  | 3,003,000 |
Deferred Tax Assets, Net | 4,307,000 |  | 4,307,000 |
State |  |  |  |
Income Taxes [Line Items] |  |  |  |
Valuation allowance, deferred tax asset, increase (decrease), amount |  |  | 373,000 |
Deferred Tax Assets, Net | $ 284,000 |  | $ 284,000 |

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- Definition Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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