Statements of Operations - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating expenses
Research and development	$ 4,254,000	$ 1,564,000
General and administrative	1,767,000	1,112,000
Total operating expenses	6,021,000	2,676,000
Other income (expense)
Interest income (expense)	11,000	24,000
Derivative gain	831,000	(3,160,000)
Total other income (expense)	842,000	(3,136,000)
Net (loss) income	$ (5,179,000)	$ (5,812,000)
Net (loss) income per common share: Basic	$ (0.03)	$ (0.05)
Net (loss) income per common share: Diluted	$ (0.04)	$ (0.05)
Weighted average number of common shares outstanding: Basic	159,054,000	111,104,000
Weighted average number of common shares outstanding: Diluted	160,558,000	111,104,000