Consolidated Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Consolidated Statements of Operations [Abstract]
Grant revenue	$ 1,066,000
Operating expenses
Research and development	4,350,000	$ 2,750,000
General and administrative	2,151,000	2,171,000
Total operating expenses	6,501,000	4,921,000
Loss from operations	(5,435,000)	(4,921,000)
Other income (expense)
Interest income	2,000	2,000
Interest expense	(62,000)	(159,000)
Total other income (expense), net	(60,000)	(157,000)
Net loss	$ (5,495,000)	$ (5,078,000)
Per share information:
Net loss per share, basic and diluted (in dollars per share)	$ (0.27)	$ (0.49)
Weighted average shares outstanding, basic and diluted	20,458,355	10,451,746