Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail)	3 Months Ended	6 Months Ended
	Jul. 02, 2017 USD ($)	Jul. 01, 2018 USD ($) Country State	Jul. 02, 2017 USD ($)	Dec. 31, 2017 USD ($)	Apr. 02, 2017 USD ($)	Jan. 01, 2017 USD ($)
Accounting Policies [Abstract]
Number of States in which Entity Operates | State		47
Number of foreign countries in which Entity operates | Country		14
Related Party Transaction [Line Items]
Restricted cash	$ 115,000	$ 207,000	$ 115,000	$ 112,000		$ 268,000
Deferred financing costs, net		10,433,000		11,993,000
Cash, cash equivalents and restricted cash, at Carrying Value	89,577,000	89,094,000	89,577,000	$ 67,312,000	$ 89,577,000	$ 61,291,000
Contributions from franchisees to advertising and media funds		$ 1,300,000	1,200,000
Depreciation and Amortization [Member]
Related Party Transaction [Line Items]
Reclassification adjustment	1,831,520.0		3,725,246.0
Other Expense [Member]
Related Party Transaction [Line Items]
Reclassification adjustment	$ 25,800,000.0		$ 52,200,000.0