Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Operating expenses:
Research and development	$ 2,105,815	$ 3,137,553	$ 6,994,866	$ 6,845,203
Intangible asset impairment charge	8,639,000	0	8,639,000	0
General and administrative	1,930,082	2,112,375	5,510,365	4,964,440
Depreciation	19,100	24,192	67,302	78,233
Loss from operations	12,693,997	5,274,120	21,211,533	11,887,876
Other income:
Interest income	(50,710)	(29,233)	(146,354)	(89,246)
Loss from operations before income tax benefit	(12,643,287)	(5,244,887)	(21,065,179)	(11,798,630)
Income tax benefit	443,893	805,676	443,893	1,675,381
Net loss	(12,199,394)	(4,439,211)	(20,621,286)	(10,123,249)
Deemed dividend arising from warrant exchange	0	0	0	(1,950,378)
Net loss attributable to common stockholders	$ (12,199,394)	$ (4,439,211)	$ (20,621,286)	$ (12,073,627)
Per share information:
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.12)	$ (0.07)	$ (0.22)	$ (0.24)
Weighted average shares outstanding, basic and diluted (in dollars per share)	$ 101,903,979	$ 64,011,342	$ 98,810,420	$ 50,216,239