Geographic Information and Concentrations of Risk - Schedule of Geographic Concentration of Net Revenues (Detail) - Net Revenues - Geographic Concentration	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	100.00%	100.00%	100.00%	100.00%
United States and Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	73.80%	96.30%	75.40%	96.20%
Latin America
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	0.10%	0.70%	0.20%	0.70%
Europe, Middle East, Africa and other
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	24.50%	2.80%	22.90%	3.00%
Asia and Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Concentration percentage	1.60%	0.20%	1.50%	0.10%