RPX License Agreement (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended
	May 23, 2016	Mar. 31, 2017	Mar. 31, 2016
Series H Assumptions
Contribution/Deemed dividend			$ 667
RPX Corporation [Member] | Series H Convertible Preferred Stock [Member]
Series H Assumptions
Series H - Liquidation preference	$ 83.50
Contribution/Deemed dividend	$ 31,480,112
Second Patent License Agreement [Member] | RPX Corporation [Member] | Series H Convertible Preferred Stock [Member]
Assumptions
Stock price on May 22, 2016	$ 2.06
Series H Assumptions
Series H Shares	381,967
Series H -Carrying value	$ 31,894,245
Equivalent common shares - Series H	201,035
Fair Value of Series H preferred	$ 414,133