Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
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
Stock-based compensation expense	0	304,824	0	304,824
Net loss	$ 0	0	(5,684,038)	(5,684,038)
Sale of common stock and warrants, net of issuance costs (in shares)	11,428,572
Sale of common stock and warrants, net of issuance costs	$ 11,429	10,330,202	0	10,341,631
Issuance of common stock upon exercise of warrants (in shares)	19,089,361
Issuance of common stock upon exercise of warrants	$ 19,089	7,760,887	0	7,779,976
Balance (in shares) at Jun. 30, 2020	63,998,298
Balance at Jun. 30, 2020	$ 63,999	130,220,772	(97,408,116)	32,876,655
Balance (in shares) at Mar. 31, 2020	34,604,436
Balance at Mar. 31, 2020	$ 34,605	112,149,913	(94,282,893)	17,901,625
Stock-based compensation expense	0	113,444	0	113,444
Net loss	$ 0	0	(3,125,223)	(3,125,223)
Sale of common stock and warrants, net of issuance costs (in shares)	11,428,572
Sale of common stock and warrants, net of issuance costs	$ 11,429	10,330,202	0	10,341,631
Issuance of common stock upon exercise of warrants (in shares)	17,965,290
Issuance of common stock upon exercise of warrants	$ 17,965	7,627,213	0	7,645,178
Balance (in shares) at Jun. 30, 2020	63,998,298
Balance at Jun. 30, 2020	$ 63,999	130,220,772	(97,408,116)	32,876,655
Balance (in shares) at Dec. 31, 2020	64,015,441
Balance at Dec. 31, 2020	$ 64,016	130,659,550	(105,909,384)	24,814,182
Stock-based compensation expense	0	478,560	0	478,560
Net loss	$ 0	0	(8,421,892)	(8,421,892)
Sale of common stock and warrants, net of issuance costs (in shares)	33,658,538
Sale of common stock and warrants, net of issuance costs	$ 33,658	31,060,644	0	31,094,302
Issuance of common stock upon exercise of warrants (in shares)	4,230,000
Issuance of common stock upon exercise of warrants	$ 4,230	2,197,220	0	2,201,450
Balance (in shares) at Jun. 30, 2021	101,903,979
Balance at Jun. 30, 2021	$ 101,904	164,395,974	(114,331,276)	50,166,602
Balance (in shares) at Mar. 31, 2021	101,903,979
Balance at Mar. 31, 2021	$ 101,904	164,098,694	(110,553,303)	53,647,295
Stock-based compensation expense	0	297,280	0	297,280
Net loss	$ 0	0	(3,777,973)	(3,777,973)
Balance (in shares) at Jun. 30, 2021	101,903,979
Balance at Jun. 30, 2021	$ 101,904	$ 164,395,974	$ (114,331,276)	$ 50,166,602