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Long-Term Deferred Expenses | 12 Months Ended
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Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract] |
Long-Term Deferred Expenses | 9. Long-term deferred expenses Long-term deferred expenses consist of the following:
|  | Weighted average amortization period |  |  | As of December 31, |
|  |  | 2012 |  |  | 2013 |
Rent of advertising spaces |  |  | 5 years |  |  | $ | — |  |  | $ | 484 |
Concession approval fees |  |  | 3 years |  |  |  | — |  |  |  | 433 |
|  |  |  |  |  | $ | — |  |  | $ | 917 |
The amortization of the long-term deferred expenses was allocated to the cost of revenues of $66, $0 and $0 for the years ended December 31, 2013, 2012 and 2011, respectively.

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