Condensed Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Operating expenses:
Research and development	$ 1,205,599	$ 1,388,791	$ 1,952,481	$ 2,774,157
General and administrative	918,139	917,305	2,141,152	1,949,550
Total operating expenses	2,123,738	2,306,096	4,093,633	4,723,707
Loss from operations	(2,123,738)	(2,306,096)	(4,093,633)	(4,723,707)
Other income:
Interest income	9,642	2,902	14,271	4,335
Gain from change in fair value of warrant liability				433,392
Total other income	9,642	2,902	14,271	437,727
Net loss	$ (2,114,096)	$ (2,303,194)	$ (4,079,362)	$ (4,285,980)
Net loss per share of common stock, basic and diluted	$ (0.09)	$ (0.14)	$ (0.20)	$ (0.27)
Weighted-average shares used to compute basic and diluted net loss per share	23,258,567	16,425,468	20,371,442	15,926,253