Revenue from Contracts with Customers - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 25, 2020	Dec. 25, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Loyalty Rewards Program, Points Needed For One Reward	$ 100
Loyalty Rewards Program, Award Earned	$ 10
Loyalty Rewards Program, Expiration Period For Inactivity	6 years
Revenue allocated to loyalty points not redeemed	$ 1,000,000	$ 1,100,000
Loyalty rewards program, expected loyalty points redemption period (in years)	1 year
Unsatisfied performance obligations	$ 5,999,000
Franchise license
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Franchise agreement term (in years)	20 years
Franchise agreement renewal term (in years)	20 years
Hardware Services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Unsatisfied performance obligations	$ 0
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Satisfied over renewal term (in years)	10 years
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Satisfied over renewal term (in years)	20 years