Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets, Net - Additional Information (Detail)

v3.10.0.1
Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Finite Lived Intangible Assets Future Amortization Expense [Abstract]        
Definite-lived assets amortization period     3 years  
Amortization expense of definite-lived assets $ 291 $ 48 $ 905 $ 144