Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Revenues	$ 327	$ 72
Operating costs and expenses
Amortization of patent portfolio	338	531
Compensation and related expenses (including stock-based compensation)	589	312
Professional fees	285	705
Rent	22	22
Other selling, general and administrative	62	63
Total operating expenses	1,296	1,633
Loss from operations	(969)	(1,561)
Other income (expenses)
Other income (expenses), net	172	(30)
Change in fair value of warrant liabilities	(122)	1,542
Total other income	50	1,512
Net loss	(919)	(49)
Deemed dividend on conversion of Series K convertible preferred stock to common stock		(667)
Net loss attributable to common stockholders	$ (919)	$ (716)
Net loss per share attributable to common stockholders, basic and diluted (in dollars per share)	$ (0.19)	$ (.26)
Weighted average number of common shares outstanding, Basic and diluted (in shares)	4,943,929	2,705,864