Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Patent Portfolios and Patent Rights at beginning, net	$ 9,799
Patent Portfolios and Patent Rights at ending, net	4,951	$ 9,799
Patents [Member]
Patent Portfolios and Patent Rights at beginning, net	9,799	55,004
Amortization expenses	(2,135)	(6,317)
Impairment loss	(2,713)	(38,888)
Patent Portfolios and Patent Rights at ending, net	$ 4,951	$ 9,799	$ 55,004
Weighted average amortization period	3 years 7 months 24 days	4 years 7 months 17 days	5 years 7 months 13 days