Consolidated Statements of Operations and Comprehensive Loss - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Statement [Abstract]
Revenues	$ 721,636	$ 1,626,029	$ 2,934,330	$ 4,581,622
Operating expenses:
Research and development	16,594,250	2,945,096	23,781,781	6,162,768
General and administrative	2,545,356	2,231,817	4,877,273	4,298,299
Total operating expenses	19,139,606	5,176,913	28,659,054	10,461,067
Loss from operations	(18,417,970)	(3,550,884)	(25,724,724)	(5,879,445)
Other (expense) income:
Changes in fair value of warrant liability		(46,000)		(46,000)
Interest expense	(3,308)	(748)	(5,193)	(1,488)
Interest income	81,458	239,964	233,027	425,211
Other (expense) income, net	(5,878)	(29,220)	19,664	17,528
Total other (expense) income, net	72,272	163,996	247,498	395,251
Net loss before income tax benefit	(18,345,698)	(3,386,888)	(25,477,226)	(5,484,194)
Income tax benefit	1,578,782		4,824,661
Net loss	(16,766,916)	(3,386,888)	(20,652,565)	(5,484,194)
Other comprehensive loss – unrealized gain (loss) on investments	20,888		(11,547)
Comprehensive loss	(16,746,028)	(3,386,888)	(20,664,112)	(5,484,194)
Net loss	(16,766,916)	(3,386,888)	(20,652,565)	(5,484,194)
Deemed dividends				(452,925)
Net loss attributed to common stockholders	$ (16,766,916)	$ (3,386,888)	$ (20,652,565)	$ (5,937,119)
Net loss per share attributed to common stockholders, basic and diluted	$ (0.94)	$ (0.26)	$ (1.25)	$ (0.52)
Weighted-average common shares outstanding, basic and diluted	17,886,853	13,127,773	16,498,719	11,318,819