Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues		$ 314		$ 952
Operating costs and expenses
Amortization of patent portfolio	346	346	1,027	1,027
Compensation and related expenses (including stock-based compensation)	206	488	903	1,371
Professional fees	210	280	1,202	815
Impairment of intangible assets	1,051		1,051
Rent	16	21	57	70
Depreciation expense	21	1	38	2
Acquisition costs	19		230
Other selling, general and administrative	82	137	282	372
Total operating expenses	1,951	1,273	4,790	3,657
Loss from operations	(1,951)	(959)	(4,790)	(2,705)
Other (expenses) income
Other (expenses) income, net	(35)	6	(225)	299
Change in fair value of investment		345	680	345
Change in fair value of warrant liabilities	95	1,067	560	(259)
Total other income	60	1,418	1,015	385
Net (loss) income	$ (1,891)	$ 459	$ (3,775)	$ (2,320)
Net income (loss) per share attributable to common stockholders, basic and diluted
Basic (in dollars per share)	$ (0.22)	$ 0.08	$ (0.48)	$ (0.44)
Diluted (in dollars per share)	$ (0.22)	$ 0.08	$ (0.48)	$ (0.44)
Weighted average number of common shares outstanding,
Basic (in shares)	8,542,530	5,998,920	7,894,936	5,304,201
Diluted (in shares)	8,542,530	6,009,042	7,894,936	5,304,201