CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues [Abstract]
Royalties	$ 67,704	$ 62,021
Total revenues	67,704	62,021
Costs and expenses:
Research and development	2,705,691	2,648,599
Selling, general and administrative	1,486,019	1,375,185
Total operating expenses	4,191,710	4,023,784
Loss from operations	(4,124,006)	(3,961,763)
Interest income	35,823	64,743
Gain (loss) from change in fair value of derivative financial instruments—warrants	2,107	(9,761)
Other income (expense), net	(2,486)	2,010
Net loss	(4,088,562)	(3,904,771)
Preferred stock dividend payable on Series A Convertible Preferred Stock	(6,060)	(6,060)
Deemed dividend recognized for beneficial conversion features of Convertible Preferred Stock issuance	0	(268,269)
Net loss attributable to common stockholders	$ (4,094,622)	$ (4,179,100)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.41)	$ (1.02)
Weighted-average shares outstanding - basic and diluted (in shares)	9,910,306	4,086,561