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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Data and media costs incurred | $ 844 | $ 405 | $ 2,104 | $ 705
Capital commitment under non-cancellable data licensing agreements, Total | 14,947 |  | 14,947 |
Purchased IP and Capitalized Litigation Costs [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Intangible assets written off |  |  | 4,055 |
Minimum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Estimated possible loss from pending litigation | 3,000 |  | 3,000 |
Maximum [Member] |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Estimated possible loss from pending litigation | $ 6,000 |  | $ 6,000 |

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