Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating expense
Research and development	$ 839	$ 2,503	$ 1,266	$ 5,104
General and administrative	1,602	2,122	3,043	4,328
Total operating expense	2,441	4,625	4,309	9,432
Loss before other income (expense)	(2,441)	(4,625)	(4,309)	(9,432)
Other income (expense)
Interest income (expense), net	3	(258)	(92)	(537)
Loss on extinguishment of debt	0	0	(422)	0
Change in fair value of warrant liability	716	1,637	(292)	4,437
Other financing expenses	0	0	0	(205)
Other expense, net	0	(7)	(26)	(11)
Total other income (expense)	719	1,372	(832)	3,684
Loss from continuing operations	(1,722)	(3,253)	(5,141)	(5,748)
Income (loss) from discontinued operations	248	(85)	11,740	(95)
Net income (loss)	$ (1,474)	$ (3,338)	$ 6,599	$ (5,843)
Basic and diluted earnings (loss) per share
Continuing operations (in usd per share)	$ (0.15)	$ (0.53)	$ (0.54)	$ (0.98)
Discontinued operations (in usd per share)	0.02	(0.01)	1.23	(0.02)
Total earnings (loss) per share (in usd per share)	$ (0.13)	$ (0.54)	$ 0.69	$ (1.00)
Weighted average common shares outstanding for basic and diluted earnings (loss) per share (in shares)	11,335	6,182	9,547	5,843