Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating expenses:
Research and development	$ 1,234	$ 577	$ 1,593	$ 1,273
General and administrative	1,746	2,032	3,625	5,989
Total operating expenses	2,980	2,609	5,218	7,262
Loss from operations	(2,980)	(2,609)	(5,218)	(7,262)
Other expense:
Interest expense	(358)	(32)	(660)	(426)
Other income (expense), net		2	(1)	(1)
Reorganization items, net		(29)		(66)
Net loss	(3,338)	(2,668)	(5,879)	(7,755)
Other comprehensive income
Comprehensive loss	$ (3,338)	$ (2,668)	$ (5,879)	$ (7,755)
Basic and diluted net loss per common share	$ (0.03)	$ (0.02)	$ (0.05)	$ (0.10)
Weighted average common shares outstanding used to calculate basic and diluted net loss per common share	111,110,926	109,377,584	110,560,662	79,517,510