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 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Revenues $ 20,311 $ 19,898 $ 39,828 $ 40,325  
Long-lived Assets 43,282   43,282   $ 43,252
UNITED STATES          
Revenues 19,244 18,618 38,012 38,418  
Long-lived Assets 43,169   43,169   43,104
UNITED STATES | Owned restaurants [Member]          
Revenues 15,520 14,683 30,596 28,911  
Long-lived Assets 38,134   38,134   37,907
UNITED STATES | Owned food, beverage and other operations [Member]          
Revenues 2,083 2,431 4,088 6,316  
Long-lived Assets 4,951   4,951   5,088
UNITED STATES | Managed and licensed operations [Member]          
Revenues 1,641 1,504 3,328 3,191  
Long-lived Assets 84   84   109
Non-US [Member]          
Revenues 1,067 1,280 1,816 1,907  
Long-lived Assets 113   113   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 0   0   0
Non-US [Member] | Managed and licensed operations [Member]          
Revenues 1,067 $ 1,280 1,816 $ 1,907  
Long-lived Assets $ 113   $ 113   $ 148