Segment Information Geographical Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 40,561	$ 55,397	$ 61,288	$ 55,146	$ 44,780	$ 47,049	$ 48,687	$ 44,077	$ 212,392	$ 184,593	$ 192,742
Property and equipment, net	6,713								6,713	6,134
Total intangible assets, net	17,575								17,575	30,322
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									129,562	81,933	74,630
Property and equipment, net	4,566								4,566	3,061
Total intangible assets, net	17,575								17,575	30,322
Other North America
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									219	631	2,079
Property and equipment, net	129								129	257
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									12,129	28,819	31,975
Property and equipment, net	438								438	1,231
Other APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									25,392	41,836	41,177
Foreign Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									82,830	102,660	118,112
Property and equipment, net	2,147								2,147	3,073
Total APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									37,521	70,655	73,152
Property and equipment, net	2,018								2,018	2,815
Netherlands
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									31,525	14,642	22,608
Other EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									13,565	16,732	20,273
Property and equipment, net	0								0	1
Total EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues									45,090	31,374	$ 42,881
India
Revenues from External Customers and Long-Lived Assets [Line Items]
Property and equipment, net	$ 1,580								$ 1,580	$ 1,584