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 |