Basis of Presentation and Summary of Significant Accounting Policies - Schedule of Property and Equipment Estimated Useful Lives (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Jan. 02, 2018
Property, Plant and Equipment [Line Items]
Pre-opening costs	$ 1,650,000	$ 1,584,000	$ 1,591,000
Leasehold improvements
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	20 years
Estimated useful lives of assets	Shorter of useful life (typically 20 years) or lease term
Buildings under capital leases
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	20 years
Estimated useful lives of assets	Shorter of useful life (typically 20 years) or lease term
Minimum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	20 years
Minimum | Restaurant and other equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	3 years
Maximum | Buildings
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	35 years
Maximum | Restaurant and other equipment
Property, Plant and Equipment [Line Items]
Estimated useful lives of assets (in years)	15 years