Segment Information - Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 49,964	$ 65,438	$ 93,763	$ 133,616
Property and equipment, net	12,346		12,346		14,854
Total Intangible Assets, Net	49,844		49,844		56,510
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,025	30,078	34,731	56,128
Property and equipment, net	5,812		5,812		7,421
Total Intangible Assets, Net					56,474
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	30,939	35,360	59,032	77,488
Property and equipment, net	6,534		6,534		7,433
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	579	434	1,703	1,086
Property and equipment, net	846		846		942
Total Intangible Assets, Net	0		0		36
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,600	19,432	33,095	45,954
Property and equipment, net	3,095		3,095		3,581
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,953	8,046	14,980	14,791
Property and equipment, net	2,978		2,978		3,396
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	2,674	5,627	9,882	18,456
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,586		2,586		2,893
Other Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	4,973	5,759	8,233	12,707
Property and equipment, net	117		117		185
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,130	3,697	11,169	8,962
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,630	11,797	13,065	21,486
Property and equipment, net	7		7		17
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	14,760	15,494	24,234	30,448
Property and equipment, net	$ 2,593		$ 2,593		$ 2,910