Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 53,889	$ 44,921	$ 167,775	$ 137,444
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	48,125	38,709	149,436	118,091
Americas, excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	688	1,128	1,991	3,635
Europe, Middle East, India, Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,223	3,804	11,122	11,786
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,853	$ 1,280	$ 5,226	$ 3,932