Segment Information - Geographical Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 54,109	$ 63,725	$ 187,725	$ 216,796
Property and equipment, net	15,660		15,660		17,713
Total Intangible Assets, Net	59,869		59,869		70,284
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	21,205	21,321	77,333	75,611
Property and equipment, net	7,974		7,974		8,572
Total Intangible Assets, Net	59,789		59,789		68,903
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	32,904	42,404	110,392	141,185
Property and equipment, net	7,686		7,686		9,141
Total Intangible Assets, Net	80		80		1,381
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	770	715	1,856	2,376
Property and equipment, net	959		959		953
Total Intangible Assets, Net	80		80		211
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	19,257	26,412	65,211	91,713
Property and equipment, net	6,706		6,706		8,153
CHINA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	8,890	12,352	23,681	35,222
Property and equipment, net	3,710		3,710		4,685
JAPAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	6,751	8,943	25,207	32,350
INDIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	2,768		2,768		3,110
Other Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	3,616	5,117	16,323	24,141
Property and equipment, net	228		228		358
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	12,877	15,277	43,325	47,096
Property and equipment, net	21		21		35
Total Intangible Assets, Net	$ 0		$ 0		$ 1,170