Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended
	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Jan. 01, 2017
Income Tax Contingency [Line Items]
Deferred tax assets valuation allowance		$ 0		$ 0
Write-off of deferred tax assets related to share based compensation	$ 200,000		$ 800,000
Unrecognized tax benefits		$ 0		0
Unrecognized tax benefits, period		Over the next 12 months
Accrued interest or penalties		$ 0		$ 0
Earliest Tax Year [Member] | Federal [Member]
Income Tax Contingency [Line Items]
Income tax returns in period		2013
Earliest Tax Year [Member] | State and Local [Member]
Income Tax Contingency [Line Items]
Income tax returns in period		2012