Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating activities
Net loss	$ (7,125,655)	$ (7,566,080)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,373,958	1,539,469
Change in fair value of warrant liability		(433,392)
Change in operating assets and liabilities:
Prepaid expenses and other assets	(116,676)	(78,172)
Accounts payable and accrued expenses	106,280	(440,385)
Net cash used in operating activities	(5,762,093)	(6,978,560)
Financing activities
Proceeds from issuance of common stock, net	6,106,922	4,618,297
Net cash provided by financing activities	6,106,922	4,618,297
Net increase (decrease) in cash and cash equivalents	344,829	(2,360,263)
Cash and cash equivalents at beginning of period	5,319,004	7,679,267
Cash and cash equivalents at end of period	$ 5,663,833	5,319,004
Non-cash financing activities
Reclassification of warrant liability to equity due to amendment of warrants		$ 3,267,885