Information about Geographic Areas - Classification of Revenue by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 23,933	$ 15,693	$ 61,257	$ 40,352
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	16,784	10,929	43,188	26,584
Europe & Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4,934	3,400	12,667	9,355
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,215	$ 1,364	$ 5,402	$ 4,413