Statements of Operations - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating expenses
Research and development	$ 1,118,000	$ 2,136,000	$ 5,373,000	$ 3,702,000
General and administrative	1,482,000	1,445,000	3,249,000	2,556,000
Total operating expenses	2,600,000	3,581,000	8,622,000	6,258,000
Other income (expense)
Interest income	0	21,000	12,000	45,000
Paycheck protection program grant	544,000	0	544,000	0
Derivative (loss) gain	(675,000)	3,981,000	156,000	822,000
Total other income (expense)	(131,000)	4,002,000	712,000	867,000
Net (loss) income	$ (2,731,000)	$ 421,000	$ (7,910,000)	$ (5,391,000)
Net loss per common share: Basic	$ (0.02)	$ 0.00	$ (0.05)	$ (0.05)
Net loss per common share: Diluted	$ (0.02)	$ (0.03)	$ (0.05)	$ (0.05)
Weighted average number of common shares outstanding: Basic	166,393,000	115,031,000	162,723,000	113,079,000
Weighted average number of common shares outstanding: Diluted	166,393,000	118,770,000	163,906,000	117,350,000