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Commitments and Contingencies - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]    
Rental expenses $ 365,000 $ 11,000
Material capital commitments under non-cancellable data licensing agreements 11,414,000  
Data and media costs incurred 924,000 41,000
Provision for claims $ 0 $ 0