v3.6.0.2
Intangible assets - Carrying Amount (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Intangible assets      
Historical Cost $ 31,815 $ 30,634  
Accumulated Amortization (18,032) (14,579)  
Net 13,783 16,055 $ 19,676
Venue contracts      
Intangible assets      
Historical Cost 23,601 23,630  
Accumulated Amortization (13,276) (11,104)  
Net 10,325 12,526  
Non-compete agreement      
Intangible assets      
Historical Cost 3,590 3,590  
Accumulated Amortization (2,274) (1,556)  
Net 1,316 2,034  
Technology      
Intangible assets      
Historical Cost 3,520 2,310  
Accumulated Amortization (1,742) (1,295)  
Net 1,778 1,015  
Advertiser relationships      
Intangible assets      
Historical Cost 70 70  
Accumulated Amortization (62) (48)  
Net 8 22  
Patents, trademarks and other      
Intangible assets      
Historical Cost 1,034 1,034  
Accumulated Amortization (678) (576)  
Net $ 356 $ 458