Segment Information - Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 35,093	$ 61,288	$ 72,703	$ 116,434
Property and equipment, net	7,253		7,253		$ 6,713
Total Intangible Assets, Net	11,202		11,202		17,575
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14,776	44,275	37,928	82,040
Property and equipment, net	4,925		4,925		4,566
Total Intangible Assets, Net					17,575
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	20,317	17,013	34,775	34,394
Property and equipment, net	2,328		2,328		2,147
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	415	39	434	117
Property and equipment, net	78		78		129
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,697	6,461	12,116	14,079
Property and equipment, net	2,250		2,250		2,018
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	369		369		438
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,881		1,881		$ 1,580
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,378	7,838	13,601	15,073
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,827	2,675	8,624	5,125
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 13,205	$ 10,513	$ 22,225	$ 20,198