Segment Information Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 44,077	$ 44,780	$ 47,049	$ 48,687	$ 48,174	$ 50,805	$ 49,964	$ 43,799	$ 184,593	$ 192,742	$ 237,863
Property and equipment, net	6,134				9,786				6,134	9,786
Total intangible assets, net	30,322				43,224				30,322	43,224
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									81,933	74,630	100,780
Property and equipment, net	3,061				4,558				3,061	4,558
Total intangible assets, net	30,322				43,224				30,322	43,224
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									631	2,079	3,042
Property and equipment, net	257				672				257	672
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									28,819	31,975	29,818
Property and equipment, net	1,231				2,427				1,231	2,427
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									13,574	14,848	30,724
Other APAC [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									28,262	26,329	20,988
Property and equipment, net	0				11				0	11
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									102,660	118,112	137,083
Property and equipment, net	3,073				5,228				3,073	5,228
Asia Pacific [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									70,655	73,152	81,530
Property and equipment, net	1,231				2,438				1,231	2,438
India [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	1,584				2,115				1,584	2,115
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									14,642	22,608	19,017
Other EMEA [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									16,732	20,273	33,494
Property and equipment, net	1				3				1	3
Europe, the Middle East and Africa [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									31,374	42,881	$ 52,511
Property and equipment, net	$ 1,585				$ 2,118				$ 1,585	$ 2,118