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