CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Collaboration revenue	$ 0	$ 0	$ 42,620	$ 0
Total revenues	0	0	42,620	0
Operating expenses
Research and development	1,477,382	1,305,461	4,759,569	6,338,530
In-process research and development	7,000,000	0	7,000,000	0
General and administrative	1,704,598	1,408,350	5,760,398	3,544,847
Total operating expenses	10,181,980	2,713,811	17,519,967	9,883,377
Loss from operations	(10,181,980)	(2,713,811)	(17,477,347)	(9,883,377)
Other income (expense)
Change in fair value of derivative liabilities	0	(18,512,204)	0	(19,896,626)
Loss on debt conversion	0	0	0	(341,136)
Interest income	42	136	594	1,107
Interest expense	(291,909)	(796,141)	(554,801)	(1,753,172)
Other income (expense)	0	(751,261)	(87)	(751,493)
Total other income (expense)	(291,867)	(20,059,470)	(554,294)	(22,741,320)
Net loss	(10,473,847)	(22,773,281)	(18,031,641)	(32,624,697)
Deemed dividend related to Warrant Exchange	0	0	(12,546,340)	0
Net loss to common stockholders	$ (10,473,847)	$ (22,773,281)	$ (30,577,981)	$ (32,624,697)
Shares used in calculating net loss per common share—basic and diluted (in shares)	141,591,218	6,411,308	92,764,157	5,839,840
Net loss per share of common stock - basic and diluted (in USD per share)	$ (0.07)	$ (3.55)	$ (0.33)	$ (5.59)
Net loss	$ (10,473,847)	$ (22,773,281)	$ (18,031,641)	$ (32,624,697)
Other comprehensive income (loss)
Foreign currency translation adjustment	0	0	0	(451)
Comprehensive loss	$ (10,473,847)	$ (22,773,281)	$ (18,031,641)	$ (32,625,148)