Information about Geographic Areas - Classification of Revenue by Geography (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 13,066	$ 10,881	$ 24,659	$ 19,632
Americas [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	8,133	7,387	15,656	13,376
Europe & Middle East [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	3,012	2,130	5,955	3,893
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 1,921	$ 1,364	$ 3,048	$ 2,363