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Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Income Taxes [Line Items]
Income tax benefit			$ 5,600,000
Corporate income tax rate	21.00%	21.00%	21.00%	35.00%
Gross amount of unrecognized tax benefits	$ 0	$ 306,000	$ 750,000	$ 1,259,000
Impact to effective tax rate for unrecognized tax benefits	0
Unrecognized tax benefit, accrued interest	0	$ 100,000
Domestic Tax Authority
Income Taxes [Line Items]
Federal net operating loss carryforwards	3,100,000
State and Local Jurisdiction
Income Taxes [Line Items]
State net operating loss carryforwards	5,300,000
Credit carryforwards	$ 4,600,000
Operating loss carryforwards expiration date	Dec. 31, 2040

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Income Taxes [Line Items]

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible domestic operating loss carryforwards. Excludes state and local operating loss carryforwards.

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Amount, before allocation of a valuation allowances, of deferred tax assets attributable to deductible tax credit carryforwards including, but not limited to, research, foreign, general business, alternative minimum tax, and other deductible tax credit carryforwards.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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