Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Pre-funded Warrants [Member] Preferred Stock [Member] Series A Preferred Stock [Member]	Pre-funded Warrants [Member] Common Stock [Member]	Pre-funded Warrants [Member]	Preferred Stock [Member] Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017				8,306,278	967,976
Balance at Dec. 31, 2017					$ 968	$ 82,783,865	$ (61,554,889)	$ 21,229,944
Conversion of Series A convertible preferred stock to common stock (in shares)				(8,306,278)	553,752
Conversion of Series A convertible preferred stock to common stock					$ 554	(554)
Issuance of common stock to Series A convertible preferred stockholders under make-whole adjustment feature (in shares)					777,895
Issuance of common stock to Series A convertible preferred stockholders under make-whole adjustment feature					$ 778	(778)
Issuance of common stock related to accrued dividends (in shares)					68,815
Issuance of common stock related to accrued dividends					$ 69	1,148,238		1,148,307
Series A cumulative preferred dividend						(85,993)		(85,993)
Series A cumulative preferred dividend						(85,993)		(85,993)
Issuance of common stock and warrants, net of issuance costs (in shares)					1,000,000
Issuance of common stock and warrants, net of issuance costs					$ 1,000	10,416,520		10,417,520
Common stock issued for advisory services (in shares)					7,792
Common stock issued for advisory services					$ 8	49,992		50,000
Stock-based compensation expense						1,221,591		1,221,591
Net loss							(18,369,810)	(18,369,810)
Balance (in shares) at Dec. 31, 2018					3,376,230
Balance at Dec. 31, 2018					$ 3,377	95,532,881	(79,924,699)	15,611,559
Stock-based compensation expense						515,762		515,762
Net loss							(11,799,379)	(11,799,379)
Issuance of common stock, pre-funded warrants and warrants, net of issuance costs (in shares)					12,688,276
Issuance of common stock, pre-funded warrants and warrants, net of issuance costs					$ 12,688	11,905,207		11,917,895
Proceeds from warrants (in shares)		17,415,859
Proceeds from warrants		$ 17,416	$ 3,888,425
Balance (in shares) at Dec. 31, 2019					33,480,365
Balance at Dec. 31, 2019					$ 33,481	$ 111,824,859	$ (91,724,078)	$ 20,134,262