Condensed Consolidated 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	$ 1,518,381	$ 1,391,113	$ 3,218,226	$ 3,216,681
General and administrative	1,068,452	1,660,630	2,269,180	3,158,469
Depreciation	34,390	26,709	52,662	54,727
Loss from operations	2,621,223	3,078,452	5,540,068	6,429,877
Other income:
Interest income	(16,921)	(45,339)	(37,605)	(82,803)
Loss from operations before income tax benefit	(2,604,302)	(3,033,113)	(5,502,463)	(6,347,074)
Income tax benefit	(108,904)	(267,932)	(259,256)	(267,932)
Net loss	(2,495,398)	(2,765,181)	(5,243,207)	(6,079,142)
Series A cumulative preferred dividends				(85,993)
Deemed dividend related to the make-whole provision for the conversion of Series A convertible preferred stock into common stock				(8,167,895)
Net loss attributable to common stockholders	$ (2,495,398)	$ (2,765,181)	$ (5,243,207)	$ (14,333,030)
Per share information:
Net loss per share of common stock, basic and diluted (in dollars per share)	$ (0.63)	$ (0.82)	$ (1.43)	$ (4.64)
Weighted average shares outstanding, basic and diluted (in dollars per share)	$ 3,940,684	$ 3,369,770	$ 3,658,457	$ 3,092,043