XML 50 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Financial Statement Components - Components of Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Payables And Accruals [Abstract]    
Accrued compensation and benefits $ 19,285 $ 18,578
Accrued sales, use and telecom related taxes 16,961 11,828
Accrued marketing 11,928 7,020
Other accrued expenses 37,540 17,551
Total accrued liabilities $ 85,714 $ 54,977