Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Patent Portfolios at December 31, 2014, net	$ 55,004
Impairment loss	38,900
Patent Portfolios at December 31, 2015, net	9,799	$ 55,004
Patents [Member]
Patent Portfolios at December 31, 2014, net	55,004	64,835
Amortization expenses	(6,317)
Impairment loss	(38,888)	(9,831)
Patent Portfolios at December 31, 2015, net	$ 9,799	$ 55,004	$ 64,835
Weighted average amortization period	4 years 7 months 17 days	5 years 7 months 13 days	6 years 7 months 13 days