Segment Information - Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 37,610	$ 55,146
Property and equipment, net	7,325		$ 6,713
Total Intangible Assets, Net	14,388		17,575
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23,152	37,765
Property and equipment, net	4,950		4,566
Total Intangible Assets, Net			17,575
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14,458	17,381
Property and equipment, net	2,375		2,147
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19	78
Property and equipment, net	102		129
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,419	7,618
Property and equipment, net	2,273		2,018
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	406		438
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,867		$ 1,580
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,223	7,235
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,797	2,450
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 9,020	$ 9,685