Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Patent Portfolios at December 31, 2014, net			$ 55,004
Amortization expenses	$ 722	$ 2,476	5,594	$ 7,354
Impairment loss			37,212
Patent Portfolios at September 30, 2015, net	$ 13,910		13,910		$ 55,004
Patents [Member]
Patent Portfolios at December 31, 2014, net			55,004
Amortization expenses			5,594
Impairment loss			35,500
Patent Portfolios at September 30, 2015, net	$ 13,910		$ 13,910		$ 55,004
Weighted average amortization period			4 years 10 months 17 days		5 years 7 months 13 days