Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating expenses:
Research and development	$ 1,699,845	$ 1,825,568
General and administrative	1,200,728	1,497,839
Depreciation	18,272	28,018
Loss from operations	2,918,845	3,351,425
Other income:
Interest income	(20,684)	(37,464)
Loss from operations before income tax benefit	(2,898,161)	(3,313,961)
Income tax benefit	(150,352)
Net loss	(2,747,809)	(3,313,961)
Series A cumulative preferred dividends		(85,993)
Deemed dividend related to the make-whole provision for the conversion of Series A preferred stock into common stock		(8,167,895)
Net loss attributable to common stockholders	$ (2,747,809)	$ (11,567,849)
Per share information:
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.81)	$ (4.11)
Weighted average shares outstanding, basic and diluted (in dollars per share)	$ 3,376,230	$ 2,814,316