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Intangible assets, net - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Mar. 31, 2017
Jun. 30, 2018
Jun. 30, 2017
Finite-Lived Intangible Assets [Line Items]          
Write-off of long-lived assets         $ 3,626
Amortization expense $ 3,213 $ 3,147   $ 6,421 $ 6,258
Software Developed for Internal Use [Member]          
Finite-Lived Intangible Assets [Line Items]          
Intangible assets that have not started amortization $ 1,655     $ 1,655  
Q Interactive Acquisition [Member] | Acquired Proprietary Technology and Trade Names [Member]          
Finite-Lived Intangible Assets [Line Items]          
Write-off of long-lived assets     $ 3,626