Quarterly report pursuant to Section 13 or 15(d)

Geographic information (Details)

v3.10.0.1
Geographic information (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Revenues $ 19,960 $ 17,812 $ 59,788 $ 58,137  
Long-lived Assets 43,849   43,849   $ 43,252
UNITED STATES          
Revenues 18,741 16,663 56,753 55,081  
Long-lived Assets 43,463   43,463   43,104
UNITED STATES | Owned restaurants [Member]          
Revenues 15,312 13,189 45,908 42,100  
Long-lived Assets 38,215   38,215   37,907
UNITED STATES | Owned food, beverage and other operations [Member]          
Revenues 1,960 2,144 6,048 8,460  
Long-lived Assets 5,164   5,164   5,088
UNITED STATES | Managed and licensed operations [Member]          
Revenues 1,469 1,330 4,797 4,521  
Long-lived Assets 84   84   109
Non-US [Member]          
Revenues 1,219 1,149 3,035 3,056  
Long-lived Assets 386   386   148
Non-US [Member] | Owned restaurants [Member]          
Revenues 0 0 0 0  
Long-lived Assets 0   0   0
Non-US [Member] | Owned food, beverage and other operations [Member]          
Revenues 0 0 0 0  
Long-lived Assets 83   83   0
Non-US [Member] | Managed and licensed operations [Member]          
Revenues 1,219 $ 1,149 3,035 $ 3,056  
Long-lived Assets $ 303   $ 303   $ 148