Condensed Statements of Operations - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating expenses:
Research and development	$ 3,227,048	$ 2,828,787	$ 8,366,702	$ 11,021,251
General and administrative	2,661,989	2,533,678	8,263,677	13,683,852
Total operating expenses	5,889,037	5,362,465	16,630,379	24,705,103
Loss from operations	(5,889,037)	(5,362,465)	(16,630,379)	(24,705,103)
Other (expense) income, net:
Interest and other (expense) income, net	(4,129)	91,321	17,673	420,348
Foreign currency transaction (loss) gain	(35,092)	19,671	(35,059)	23,070
Total other (expense) income, net	(39,221)	110,992	(17,386)	443,418
Net loss	$ (5,928,258)	$ (5,251,473)	$ (16,647,765)	$ (24,261,685)
Net loss per share - basic and diluted	$ (0.51)	$ (0.52)	$ (1.56)	$ (2.40)
Weighted average common shares outstanding - basic and diluted	11,514,254	10,095,176	10,662,164	10,091,169