Condensed Consolidated Statements of Operations (unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenue	$ 5,539,365	$ 6,239,628
Operating expenses:
Research and development	34,866,882	21,726,686
General and administrative	12,318,713	7,925,005
Total operating expenses	47,185,595	29,651,691
Loss from operations	(41,646,230)	(23,412,063)
Other income (expenses)
Other income, net	247,806	390,009
Interest income	450,383	1,299,133
Interest expense	(16,250)	(16,250)
Total other income	681,939	1,672,892
Net loss	$ (40,964,291)	$ (21,739,171)
Net loss per common share, basic and diluted	$ (0.84)	$ (0.56)
Weighted average common shares outstanding, basic and diluted	48,621,663	38,548,483