Information about Geographic Areas - Classification of Revenue by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 34,592	$ 22,627	$ 52,656	$ 37,324
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	27,341	16,319	39,552	26,404
Europe & Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5,237	4,880	9,653	7,733
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2,014	$ 1,428	$ 3,451	$ 3,187