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Intangible Assets, Net - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Amortization expenses $ 698 $ 6
Purchased intellectual property litigation costs and internally developed software ,capitalized 3,428  
Estimated amortization expenses of intangible assets for 2016 10,282  
Estimated amortization expenses of intangible assets for 2017 10,455  
Estimated amortization expenses of intangible assets for 2018 10,455  
Estimated amortization expenses of intangible assets for 2019 10,455  
Estimated amortization expenses of intangible assets for 2020 10,265  
Estimated amortization expenses of intangible assets after 2020 35,533  
Purchased IP and Capitalized Litigation Costs [Member]    
Finite-Lived Intangible Assets [Line Items]    
Unamortized intangible assets 1,384  
Purchased intellectual property litigation costs and internally developed software ,capitalized 1,198  
Software Developed for Internal Use [Member]    
Finite-Lived Intangible Assets [Line Items]    
Unamortized intangible assets 2,090  
Purchased intellectual property litigation costs and internally developed software ,capitalized $ 2,230