Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 51,984	$ 45,087	$ 113,886	$ 92,522
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	45,290	38,510	101,311	79,382
Americas, excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	724	1,210	1,303	2,506
Europe, Middle East, India, Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,256	4,088	7,899	7,982
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,714	$ 1,279	$ 3,373	$ 2,652