Segment Information - Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 43,799	$ 68,178
Property and equipment, net	13,474		14,854
Total Intangible Assets, Net	53,159		56,510
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	15,706	26,050
Property and equipment, net	6,600		7,421
Total Intangible Assets, Net	53,159		56,474
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	28,093	42,128
Property and equipment, net	6,874		7,433
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,124	652
Property and equipment, net	836		942
Total Intangible Assets, Net	0		36
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	17,495	26,522
Property and equipment, net	3,282		3,581
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,027	6,745
Property and equipment, net	3,135		3,396
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	7,208	8,560
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,745		2,893
Other Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,260	11,217
Property and equipment, net	147		185
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	11		17
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	9,474	14,954
Property and equipment, net	$ 2,756		$ 2,910