Condensed Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Total operating revenues	$ 21,000	$ 0
Operating expenses:
Research and development	1,905,000	1,455,000
General and administrative	3,331,000	683,000
Total operating expenses	5,236,000	2,138,000
Loss from operations	(5,215,000)	(2,138,000)
Other income and expense:
Miscellaneous income, net	136,000	6,000
Interest income	4,000	27,000
Interest expense	(48,000)	0
Other income, net	92,000	33,000
Net loss before taxes	(5,123,000)	(2,105,000)
Income tax benefit	5,463,000	0
Net income (loss)	340,000	(2,105,000)
Accretion of preferred stock to current redemption value	(651,000)	(750,000)
Net loss attributable to common shareholders	$ (311,000)	$ (2,855,000)
Basic and diluted loss per share (in dollars per share)	$ (0.14)	$ (2.13)
Basic and diluted average shares outstanding (in shares)	2,189,758	1,339,289