Income Taxes - Additional Information (Detail) - USD ($)	4 Months Ended	6 Months Ended	12 Months Ended
	Jan. 01, 2019	Dec. 29, 2015	Jan. 01, 2019	Jan. 02, 2018	Jan. 03, 2017
Income Tax Disclosure [Line Items]
Federal income taxes (percent)			21.00%	35.00%
Tax reform			$ (29,100,000)
Successor
Income Tax Disclosure [Line Items]
Federal income taxes (percent)			21.00%	35.00%	35.00%
Tax reform	$ (300,000)		$ (291,000)	$ (29,111,000)	$ 0
Effective income tax rates (percent)		42.30%	26.00%	(46.50%)	42.30%
Valuation allowance	0		$ 0	$ 0
Liability for uncertain tax positions	200,000		200,000	200,000
Unrecognized tax benefits that would impact effective tax rate	200,000		200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0		0
Domestic Tax Authority | Successor
Income Tax Disclosure [Line Items]
Operating loss carryforwards	0		0
Tax credit carryforward	0		0	0
State and Local Jurisdiction [Member]
Income Tax Disclosure [Line Items]
Tax credit carryforward				$ 600,000
State and Local Jurisdiction [Member] | Successor
Income Tax Disclosure [Line Items]
Operating loss carryforwards	0		0
Tax credit carryforward	$ 100,000		$ 100,000