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Income Taxes - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 03, 2020
Jun. 28, 2019
Jul. 03, 2020
Jun. 28, 2019
Income Taxes [Line Items]        
Income tax expense (benefit) $ 556,000 $ 1,131,000 $ (602,000) $ 1,620,000
Unrecognized tax benefits related to uncertain tax positions 0   $ 0  
Percentage of deduction in GILTI     50.00%  
Income tax reconciliation of global intangible low-taxed income 4,137,000 $ 5,635,000 $ 5,400,000 $ 7,699,000
Valuation allowance, deferred tax asset, increase (decrease), amount     4,745,000  
Valuation allowance, deferred tax asset, increase (decrease), amount, COVID effect     1,369,000  
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax 136,000   136,000  
US        
Income Taxes [Line Items]        
Deferred tax assets, valuation allowance 36,530,000   36,530,000  
Deferred Tax Assets, Net 4,881,000   4,881,000  
Federal        
Income Taxes [Line Items]        
Valuation allowance, deferred tax asset, increase (decrease), amount     3,003,000  
Deferred Tax Assets, Net 4,439,000   4,439,000  
State        
Income Taxes [Line Items]        
Valuation allowance, deferred tax asset, increase (decrease), amount     373,000  
Deferred Tax Assets, Net $ 306,000   $ 306,000