Information about Geographic Areas - Classification of Revenue by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 25,232	$ 23,933	$ 22,627	$ 14,697	$ 22,315	$ 15,693	$ 13,066	$ 11,593	$ 86,489	$ 62,667	$ 47,593
Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									60,330	41,265	32,244
Europe & Middle East
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									18,497	14,807	9,174
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 7,662	$ 6,595	$ 6,175