Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Revenues	$ 21	$ 138
Operating expenses:
Research and development	4,300	4,326
General and administrative	4,708	3,176
Total operating expenses	9,008	7,502
Operating loss	(8,987)	(7,364)
Total other income, net	79	4
Loss before income taxes	(8,908)	(7,360)
Provision for income taxes	0	0
Net loss	$ (8,908)	$ (7,360)
Net loss per share: Basic and diluted	$ (19.33)	$ (57.46)
Weighted average shares: basic and diluted	460,809	128,085