Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenues	$ 177		$ 249	$ 2
Operating costs and expenses
Amortization of patent portfolio	531	2,450	1,062	4,872
Compensation and related expenses (including stock-based compensation)	361	(54)	673	665
Professional fees	824	551	1,529	1,280
Impairment of goodwill and intangible assets		37,212		37,212
Rent	23	22	45	44
Other selling, general and administrative	60	122	123	348
Total operating expenses	1,799	40,303	3,432	44,421
Loss from operations	(1,622)	(40,303)	(3,183)	(44,419)
Other (expenses) income
Other income (expenses), net	55	(5)	25	25
Change in fair value of warrant liabilities	(511)		1,031
Total other expenses	(456)	(5)	1,056	25
Net loss	(2,078)	(40,308)	(2,127)	(44,394)
Deemed capital contribution on extinguishment of preferred stock	31,480		31,480
Net income (loss) attributable to common stockholders	$ 29,402	$ (40,308)	$ 29,353	$ (44,394)
Net income (loss) per share attributable to common stockholders, basic and diluted (in dollars per share)
Basic (in dollars per share)	$ 9.61	$ (26.76)	$ 10.18	$ (29.48)
Diluted (in dollars per share)	$ 9.21	$ (26.76)	$ 9.32	$ (29.48)
Weighted average number of common shares outstanding, (in shares)
Basic (in shares)	3,060,455	1,506,221	2,883,160	1,506,055
Diluted (in shares)	3,193,227	1,506,221	3,147,022	1,506,055