Condensed Consolidated Statements of Operations (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating expenses
Research and development	$ 982	$ 708	$ 2,046	$ 1,959
Sales and marketing	0	0	26	0
General and administrative	1,707	1,260	4,900	4,532
Total expenses	2,689	1,968	6,972	6,491
Operating loss	(2,689)	(1,968)	(6,972)	(6,491)
Interest and other income (expense)
Interest Income	4	0	7	0
Change in fair value of warrants liabilities income (expense)	130	200	(29)	1,295
Cease-use expense	4	0	3	(94)
Other expense	0	(9)	(602)	(26)
Interest and other income (expense), net	138	191	(621)	1,175
Loss from continuing operations	(2,551)	(1,777)	(7,593)	(5,316)
Loss from discontinued operations:
Operating loss	(1,027)	(973)	(2,841)	(4,136)
Loss on sale of assets	(208)	0	(208)	0
Total	(1,235)	(973)	(3,049)	(4,136)
Net loss	$ (3,786)	$ (2,750)	$ (10,642)	$ (9,452)
Loss per common share from continuing operations, basic and diluted (Note 14) (in usd per share)	$ (0.24)	$ (0.56)	$ (0.85)	$ (1.73)
Loss per common share from discontinued operations, basic and diluted (Note 14):
Operating (in usd per share)	(0.09)	(0.31)	(0.32)	(1.35)
Loss on sale of assets (in usd per share)	(0.02)	0.00	(0.02)	0.00
Total (in usd per share)	(0.11)	(0.31)	(0.34)	(1.35)
Net loss per share common share, basic and diluted (in usd per share)	$ (0.35)	$ (0.87)	$ (1.19)	$ (3.08)
Weighted-average common shares outstanding used to calculate basic and diluted net loss per common share (in shares)	10,766,608	3,152,306	8,936,255	3,072,729