Stock-Based Compensation Recognized within Our Consolidated Financial Statements (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 29, 2020	Dec. 31, 2019	Jan. 01, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Capitalized	[1]	$ 29	$ 294	$ 328
Labor and benefits
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation		2,755	2,372	2,253
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation		$ 7,036	$ 6,546	$ 6,003

[1] Capitalized stock-based compensation relates to our restaurant development personnel and is included in “Property and equipment, net” on our Consolidated Balance Sheets.