Segment Information - Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 47,049	$ 49,964	$ 95,736	$ 93,763
Property and equipment, net	7,625		7,625		$ 9,786
Total Intangible Assets, Net	36,730		36,730		43,224
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	18,472	19,025	39,644	34,731
Property and equipment, net	3,796		3,796		4,558
Total Intangible Assets, Net					43,224
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	28,577	30,939	56,092	59,032
Property and equipment, net	3,829		3,829		5,228
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	242	579	287	1,703
Property and equipment, net	377		377		672
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	21,625	15,600	38,810	33,095
Property and equipment, net	1,611		1,611		2,438
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,862	7,953	20,555	14,980
Property and equipment, net	1,609		1,609		2,427
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,761	2,674	6,144	9,882
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	5,186	1,388	5,935	1,627
Property and equipment, net	1,839		1,839		2,115
Other Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,816	3,585	6,176	6,606
Property and equipment, net	2		2		11
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,825	6,130	7,187	11,169
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,885	8,630	9,808	13,065
Property and equipment, net	2		2		3
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,710	$ 14,760	16,995	$ 24,234
Property and equipment, net	$ 1,841		$ 1,841		$ 2,118