Income Taxes - Additional Information (Detail) - USD ($)	9 Months Ended
	Oct. 03, 2021	Sep. 27, 2020	Jan. 03, 2021
Income Tax Contingency [Line Items]
Write-off of deferred tax assets related to share based compensation		$ 300,000
CARES act of 2020, net operating loss (NOL) carryback description	the CARES Act allows companies with a net operating loss (“NOL”) in either 2018, 2019 or 2020 to carry back those losses five years.
CARES act of 2020, net operating loss carryback period	5 years
Income tax refund received			$ 2,100,000
Unrecognized tax benefits	$ 0		0
Unrecognized tax benefits, period	over the next 12 months
Accrued interest or penalties	$ 0		0
California [Member]
Income Tax Contingency [Line Items]
Disaster recovery credit related to fire	$ 200,000
Earliest Tax Year [Member] | Federal [Member]
Income Tax Contingency [Line Items]
Income tax returns in period	2017
Earliest Tax Year [Member] | State and Local [Member]
Income Tax Contingency [Line Items]
Income tax returns in period	2016
California Enterprise Zone Tax Credits [Member]
Income Tax Contingency [Line Items]
Deferred tax assets valuation allowance	$ 400,000		$ 700,000
Tax credits carry forward latest expiration year	2024
Change in valuation allowance	$ 300,000