Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 44,921	$ 46,274	$ 137,444	$ 109,405
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	38,709	39,745	118,091	93,376
Americas, excluding US
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,128	1,296	3,635	3,306
Europe, Middle East, India, Africa
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,804	3,608	11,786	9,370
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 1,280	$ 1,625	$ 3,932	$ 3,353