Sale and Closure of Company-Owned Stores - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 01, 2017 USD ($) Store	Jan. 03, 2016 USD ($) Store	Dec. 28, 2014 USD ($) Store
Restructuring and Related Activities [Abstract]
Number of stores closed | Store	1
Reduction of goodwill related to restructuring	$ 0.1
Number of company-owned stores sold | Store		4	14
Pre-tax gain on sale of assets, net of goodwill reduction, charged to general and administrative expenses		$ 0.7	$ 1.7
Reduction of goodwill related to sale of stores		$ 0.2	$ 0.5