Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 61,902	$ 47,435
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	56,021	40,872
Americas, excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	579	1,297
Europe, Middle East, India, Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,643	3,893
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,659	$ 1,373