Segment Information and Information about Geographic Areas - Net Revenues of Customer by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]
Net revenues, Total	$ 47,443	$ 37,268	$ 92,688	$ 72,064
North America [Member]
Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]
Net revenues, Total	40,218	32,287	78,211	62,419
Other [Member]
Entity Wide Portfolio Carrying Amount, Major Customer [Line Items]
Net revenues, Total	$ 7,225	$ 4,981	$ 14,477	$ 9,645