Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Operating expenses:
Research and development	$ 11,847,902	$ 13,851,018
General and administrative	10,954,923	16,046,423
Total operating expenses	22,802,825	29,897,441
Loss from operations	(22,802,825)	(29,897,441)
Other (expense) income, net:
Interest and other income (expense), net	13,578	471,267
Foreign currency transaction (loss) gain	(96,202)	8,205
Total other (expense) income, net	(82,624)	479,472
Net loss	$ (22,885,449)	$ (29,417,969)
Net loss per share - basic and diluted	$ (2.06)	$ (2.91)
Weighted average common shares outstanding - basic and diluted	11,121,039	10,092,179