Goodwill and Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Patent Portfolios at December 31, 2014, net			$ 55,004
Amortization expenses	$ 2,449	$ 2,449	4,871	$ 4,878
Impairment loss	40,357		40,357
Patent Portfolios at June 30, 2015, net	9,776		$ 9,776		$ 55,004
Weighted average amortization period			1 month 6 days
Patents [Member]
Patent Portfolios at December 31, 2014, net			$ 55,004
Amortization expenses			4,871
Impairment loss			40,357
Patent Portfolios at June 30, 2015, net	$ 9,776		$ 9,776		$ 55,004
Weighted average amortization period			5 years 1 month 17 days		5 years 7 months 13 days