Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Gross Carrying Amount	$ 5,113	$ 19,017
Accumulated amortization	(469)	(17,527)
Total	4,644	1,490
Amortization expense for Acquired Identifiable Intangible Assets Abstract
Amortization of Intangible Assets	981	$ 2,391	$ 2,271
Estimated Amortization Expense Abstract
2016	583
2017	583
2018	583
2019	475
2020	439
Thereafter	1,981
Total	$ 4,644
Acquired technology
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	9 years	8 years
Gross Carrying Amount	$ 4,793	$ 17,697
Accumulated amortization	(403)	(16,540)
Total	$ 4,390	$ 1,157
Customer relationships
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	10 years	8 years
Gross Carrying Amount	$ 260	$ 1,260
Accumulated amortization	(45)	(978)
Total	$ 215	$ 282
Trademark
Gross carrying amount and accumulated amortization of acquired identifiable intangible assets
Weighted Average Amortization Period	5 years	5 years
Gross Carrying Amount	$ 60	$ 60
Accumulated amortization	(21)	(9)
Total	$ 39	$ 51