Segment Information and Information about Geographic Areas (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Dec. 31, 2014 USD ($) customer	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) customer item	Sep. 30, 2014 USD ($) customer
Revenue, customers and long-lived assets by geographic area
Number of business segments | item				1
Revenue		$ 54,922	$ 39,287	$ 151,602	$ 107,609
Long-lived assets	$ 16,832	20,995		$ 20,995
Number of Customers accounting for more than ten percent of total revenue member
Revenue, customers and long-lived assets by geographic area
Number of Customers | customer				0	0
Number of Customers accounting for more than ten percent of accounts receivable member
Revenue, customers and long-lived assets by geographic area
Number of Customers | customer	0
United States
Revenue, customers and long-lived assets by geographic area
Revenue		46,518	32,991	$ 128,927	$ 90,766
Long-lived assets	$ 16,265	19,005		19,005
EMEA
Revenue, customers and long-lived assets by geographic area
Revenue		3,657	3,380	10,189	8,884
Long-lived assets	209	310		310
Other
Revenue, customers and long-lived assets by geographic area
Revenue		4,747	$ 2,916	12,486	$ 7,959
Long-lived assets	$ 358	$ 1,680		$ 1,680