CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares	Mar. 31, 2020	Dec. 31, 2019
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	27,608,783	21,018,663
Common stock, shares outstanding	27,608,783	21,018,663
Class A-1 Convertible Preferred Stock
Preferred stock, shares issued	$ 0.001	$ 0.001
Preferred stock, shares outstanding	415,898	415,898
Preferred stock, shares issued	415,898	415,898
Preferred stock, shares outstanding	415,898	415,898
Class A-2 Convertible Preferred Stock
Preferred stock, shares issued	$ 0.001	$ 0.001
Preferred stock, shares outstanding	3,288,390	3,288,390
Preferred stock, shares issued	3,228,390	3,288,390
Preferred stock, shares outstanding	2,631,708	3,288,390