Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating costs and expenses
Amortization of patent portfolio		$ 343		$ 681
Compensation and related expenses (including stock-based compensation)	175	342	356	697
Professional fees	548	395	947	992
Acquisition costs	66	66	77	211
Other selling, general and administrative	99	116	221	258
Total operating expenses	888	1,262	1,601	2,839
Loss from operations	(888)	(1,262)	(1,601)	(2,839)
Other (expenses) income
Other income (expenses) , net	(28)	(93)	64	(190)
Change in fair value of investment	145	680	(330)	680
Change in fair value of warrant liabilities	127	277	74	465
Total other income (expense)	244	864	(192)	955
Net income (loss)	$ (644)	$ (398)	$ (1,793)	$ (1,884)
Net income (loss) per share attributable to common stockholders, basic and diluted
Basic (in dollars per share)	$ (0.30)	$ (0.20)	$ (0.87)	$ (1.06)
Diluted (in dollars per share)	$ (0.30)	$ (0.20)	$ (0.87)	$ (1.06)
Weighted average number of shares outstanding, basic and diluted
Basic (in shares)	2,124,631	2,008,382	2,067,645	1,780,199
Diluted (in shares)	2,124,631	2,008,382	2,067,645	1,780,199