CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenues:
Total revenues	$ 0	$ 0	$ 466,785	$ 0
Operating expenses:
Research and development	4,803,605	3,118,530	12,897,275	9,103,670
General and administrative	2,572,562	2,536,204	7,946,846	8,063,099
Total operating expenses	7,376,167	5,654,734	20,844,121	17,166,769
Loss from operations	(7,376,167)	(5,654,734)	(20,377,336)	(17,166,769)
Other income (expense):
Change in fair value of warrant liabilities	0	(64,000)	31,000	(80,000)
Interest income	4,667	259,248	147,493	897,967
Net loss	$ (7,371,500)	$ (5,459,486)	$ (20,198,843)	$ (16,348,802)
Net loss per share, basic and diluted	$ (0.16)	$ (0.12)	$ (0.43)	$ (0.36)
Weighted average number of common shares outstanding	46,867,119	45,655,387	46,509,391	45,541,434
Grant income
Revenues:
Total revenues	$ 0	$ 0	$ 466,785	$ 0