Segment Information - Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 28,773	$ 55,397	$ 101,476	$ 171,831
Property and equipment, net	7,131		7,131		$ 6,713
Total Intangible Assets, Net	8,986		8,986		17,575
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	11,223	34,497	49,151	116,537
Property and equipment, net	5,020		5,020		4,566
Total Intangible Assets, Net					17,575
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	17,550	20,900	52,325	55,294
Property and equipment, net	2,111		2,111		2,147
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	269	44	703	161
Property and equipment, net	55		55		129
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,703	7,946	17,819	22,025
Property and equipment, net	2,056		2,056		2,018
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	354		354		438
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,702		1,702		$ 1,580
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,849	8,197	21,450	23,270
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,729	4,713	12,353	9,838
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 11,578	$ 12,910	$ 33,803	$ 33,108