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Revenue Recognition: Franchising - Other (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jun. 30, 2018
Jul. 01, 2017
Marketing Fees        
Revenue recognition        
Revenue $ 0.3 $ 0.3 $ 0.6 $ 0.6
Software License Fees        
Revenue recognition        
Revenue $ 0.1 $ 0.1 $ 0.2 $ 0.2