Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating expense
Research and development	$ 1,960	$ 170	$ 3,226	$ 5,274
General and administrative	1,756	1,550	4,799	5,878
Total operating expense	3,716	1,720	8,025	11,152
Loss before other income (expense)	(3,716)	(1,720)	(8,025)	(11,152)
Other income (expense)
Interest income (expense), net	3	(234)	(89)	(771)
Loss on extinguishment of debt	0	0	(422)	0
Change in fair value of warrant liability	(296)	626	(588)	5,063
Other financing expenses	0	(256)	0	(461)
Other expense, net	0	(12)	(26)	(23)
Total other income (expense)	(293)	124	(1,125)	3,808
Loss from continuing operations	(4,009)	(1,596)	(9,150)	(7,344)
Income from discontinued operations	177	305	11,917	210
Net income (loss)	$ (3,832)	$ (1,291)	$ 2,767	$ (7,134)
Basic and diluted earnings (loss) per share
Continuing operations (in usd per share)	$ (0.30)	$ (0.24)	$ (0.85)	$ (1.20)
Discontinued operations (in usd per share)	0.01	0.05	1.11	0.03
Total earnings (loss) per share (in usd per share)	$ (0.29)	$ (0.19)	$ 0.26	$ (1.17)
Weighted average common shares outstanding for basic and diluted earnings (loss) per share (in shares)	13,208	6,632	10,781	6,108