Consolidated Statements of Stockholders' Equity - USD ($)	Conversion of Series B Convertible Preferred Stock into Common Stock [Member] Preferred Stock [Member] Series B Convertible Preferred Stock [Member]	Conversion of Series B Convertible Preferred Stock into Common Stock [Member] Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member]	Conversion of Series B Convertible Preferred Stock into Common Stock [Member] Common Stock [Member]	Conversion of Series B Convertible Preferred Stock into Common Stock [Member] Common Stock, Additional Paid-in Capital [Member]	Conversion of Series B Convertible Preferred Stock into Common Stock [Member]	Conversion of Series C Convertible Preferred Stock to Common Stock [Member] Preferred Stock [Member] Series C Convertible Preferred Stock [Member]	Conversion of Series C Convertible Preferred Stock to Common Stock [Member] Preferred Stock Additional Paid-in Capital [Member] Series C Convertible Preferred Stock [Member]	Conversion of Series C Convertible Preferred Stock to Common Stock [Member] Common Stock [Member]	Conversion of Series C Convertible Preferred Stock to Common Stock [Member] Common Stock, Additional Paid-in Capital [Member]	Conversion of Series C Convertible Preferred Stock to Common Stock [Member]	Preferred Stock [Member] Series C Convertible Preferred Stock [Member]	Preferred Stock [Member] Series B Convertible Preferred Stock [Member]	Preferred Stock Additional Paid-in Capital [Member] Series C Convertible Preferred Stock [Member]	Preferred Stock Additional Paid-in Capital [Member] Series B Convertible Preferred Stock [Member]	Common Stock [Member]	Common Stock, Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2018												2,379			5,846,552
Balance at Dec. 31, 2018												$ 2		$ 2,378,997	$ 1,052,372	$ 82,204,902	$ (76,831,263)	$ 8,805,010
Issuance of common stock upon warrant exercise (in shares)															2,799,188
Issuance of common stock upon warrant exercise															$ 503,854	10,832,856		11,336,710
Conversion of convertible preferred stock to common stock (in shares)	(1,708)				(1,708)
Conversion of convertible preferred stock to common stock	$ (1)
Conversion of convertible preferred stock to common stock		$ (1,707,998)	$ 87,339	$ 1,620,660
Conversion of convertible preferred stock to common stock (in shares)			485,244
Compensation cost for stock options granted																7,102,118		7,102,118
Reclassification of stock-based compensation liability upon option cancellation																3,151,944		3,151,944
Net loss																	(17,239,777)	(17,239,777)
Balance (in shares) at Dec. 31, 2019												671			9,130,984
Balance at Dec. 31, 2019												$ 1		670,999	$ 1,643,565	104,912,480	(94,071,040)	13,156,005
Conversion of convertible preferred stock to common stock (in shares)	(50)				(50)	(5,425)				(5,425)
Conversion of convertible preferred stock to common stock						$ (5)
Conversion of convertible preferred stock to common stock		$ (50,000)	$ 2,557	$ 47,443			$ (5,424,995)	$ 976,500	$ 4,448,500
Conversion of convertible preferred stock to common stock (in shares)			14,208					5,425,000
Compensation cost for stock options granted																3,019,409		3,019,409
Net loss																	(17,827,952)	(17,827,952)
Issuance of common stock, net of issuance costs of $474,641 (in shares)															1,327,655
Issuance of common stock, net of issuance costs of $474,641															$ 238,979	4,425,968		4,664,947
Issuance of common stock and warrants, net of issuance costs of $1,889,658 (in shares)															31,575,000
Issuance of common stock and warrants, net of issuance costs of $1,889,658															$ 5,683,500	23,991,842		29,675,342
Allocation of common stock proceeds to warrant liability																(8,196,428)		(8,196,428)
Issuance of Series C convertible preferred stock and warrants, net of issuance costs of $259,889 (in shares)											5,425
Issuance of Series C convertible preferred stock and warrants, net of issuance costs of $259,889											$ 5		$ 5,165,106					5,165,111
Allocation of Series C convertible preferred stock to beneficial conversion feature and warrant liability													(4,242,910)			1,768,830		$ (2,474,080)
Deemed dividend on Series C convertible preferred stock													4,502,799			(4,502,799)
Common stock issued for option exercises (in shares)															225,000			225,000
Common stock issued for option exercises															$ 40,500	500,600		$ 541,100
Shares withheld related to cashless exercise of options and taxes (in shares)															(149,012)
Shares withheld related to cashless exercise of options and taxes															$ (26,823)	(528,699)		(555,522)
Balance (in shares) at Dec. 31, 2020												621			47,548,835
Balance at Dec. 31, 2020												$ 1		$ 620,999	$ 8,558,778	$ 129,887,146	$ (111,898,992)	$ 27,167,932