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Organization and Other Matters - Additional Information (Detail)		1 Months Ended
	Sep. 29, 2013 State	Oct. 09, 2013 IPO [Member] Subsequent Event [Member]	Sep. 29, 2013 Company Operated Shops [Member] Store	Dec. 30, 2012 Company Operated Shops [Member] Store	Sep. 29, 2013 Opened Shops [Member] Store	Dec. 30, 2012 Opened Shops [Member] Store	Sep. 29, 2013 Closed Shops [Member] Store	Dec. 30, 2012 Closed Shops [Member] Store	Sep. 29, 2013 First Franchise Locations [Member] Domestic Operations [Member] Store	Dec. 30, 2012 First Franchise Locations [Member] Domestic Operations [Member] Store	Sep. 29, 2013 First Franchise Locations [Member] International Operation [Member] Store	Dec. 30, 2012 First Franchise Locations [Member] International Operation [Member] Store
Nature Of Business And Basis Of Presentation [Line Items]
Number of sandwich works and shops operation states	18
Number of shops			288	264	25	31	1	1	7	5	12	10
Initial public offering of common stock		8,625,000
Initial public offering period		On October 9, 2013, the Company completed an initial public offering of 8,625,000 shares of common stock.