Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Jan. 02, 2018
Income Tax Disclosure [Line Items]
Federal income taxes (percent)	21.00%	21.00%	35.00%
Tax reform	$ 0	$ (291,000)	$ (29,111,000)
Effective income tax rates (percent)	(3.80%)	26.00%	(46.50%)
Valuation allowance	$ 0	$ 0
Liability for uncertain tax positions	200,000	200,000
Unrecognized tax benefits that would impact effective tax rate	200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0
Domestic Tax Authority
Income Tax Disclosure [Line Items]
Operating loss carryforwards	0
Tax credit carryforward	0	0
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	0
Tax credit carryforward	$ 100,000	$ 100,000