Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating expenses
Research and development	$ 877	$ 2,071
General and administrative	1,190	1,050
Total operating expenses	2,067	3,121
Loss from operations	(2,067)	(3,121)
Other income (expense)
Interest income (expense)	(32)	2
Gain on disposal of mortgage note	106
Change in fair value of derivative liabilities	21	571
Total other income, net	95	573
Loss before income tax benefit	(1,972)	(2,548)
Income tax benefit	419
Net loss and comprehensive loss	$ (1,553)	$ (2,548)
Net loss per common share:
Loss per share, basic	$ (0.06)	$ (0.11)
Weighted average common shares outstanding, basic	24,384,000	23,801,000
Loss per share, fully diluted	$ (0.06)	$ (0.11)
Weighted average common shares outstanding, diluted	24,384,000	23,801,000