CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating expenses
Research and development	$ 932	$ 1,026
General and administrative	987	970
Total operating expenses	1,919	1,996
Net operating loss	(1,919)	(1,996)
Other income
Change in fair value of warrant liability	0	1,596
Interest income	3	3
Total other income	3	1,599
Net loss	$ (1,916)	$ (397)
Loss per share
Net loss per share, basic and diluted	$ (0.17)	$ (0.04)
Basic and diluted weighted average number of common shares outstanding	11,341	9,565