Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net loss	$ (2,747,809)	$ (3,313,961)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation	18,272	28,018
Stock-based compensation expense	91,204	324,667
Change in deferred income taxes	(150,352)
Non-cash interest expense		1,356
Changes in operating assets and liabilities:
Prepaid expenses, deposits and other assets	(119,644)	(92,944)
Accounts payable, accrued expenses and other liabilities	250,871	(236,420)
Net cash used in operating activities	(2,657,458)	(3,289,284)
Cash flows provided by financing activities:
Proceeds from the sale of common stock		10,846,062
Payment of offering costs		(253,765)
Net cash provided by financing activities		10,592,297
Net (decrease) increase in cash and cash equivalents	(2,657,458)	7,303,013
Cash and cash equivalents at beginning of period	7,991,172	8,896,468
Cash and cash equivalents at end of period	5,333,714	16,199,481
Supplemental disclosure of non-cash investing and financing activities:
Reclassification of accrued dividends related to the issuance of common stock to the Series A convertible preferred stockholders		1,148,307
Offering costs in accounts payable and accrued expenses	28,549	174,777
Series A cumulative preferred dividends		(85,993)
Operating lease right of use asset and current and noncurrent liability	$ 334,205