Income Taxes - Additional Information (Detail) - USD ($)	9 Months Ended
	Oct. 01, 2017	Oct. 02, 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		$ 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	2014
Earliest Tax Year [Member] | State and Local [Member]
Income Tax Contingency [Line Items]
Income tax returns in period	2012