Information about Geographic Areas - Classification of Revenue by Geography (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 10,120	$ 8,389	$ 7,218	$ 5,676	$ 6,493	$ 6,035	$ 5,943	$ 4,502	$ 31,403	$ 22,973	$ 17,800
North America [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									21,855	15,906	14,044
Europe & Middle East [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									5,775	4,167	2,918
Asia Pacific [Member] | Reportable Geographical Components [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue									$ 3,773	$ 2,900	$ 838