Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Revenues	$ 0	$ 21
Operating expenses:
Research and development	4,431	4,300
General and administrative	4,362	4,708
Total operating expenses	8,793	9,008
Operating loss	(8,793)	(8,987)
Total other (expense) income, net	(1)	79
Loss before income taxes	(8,794)	(8,908)
Provision for income taxes	0	0
Net loss	$ (8,794)	$ (8,908)
Net loss per common share: Basic and diluted	$ (1.92)	$ (19.33)
Weighted average number of common shares outstanding: Basic and diluted	4,587,346	460,809