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Consolidated Statements 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
Issuance of common stock upon exercise of warrants, net of issuance costs (in shares) 1,124,071      
Issuance of common stock upon exercise of warrants, net of issuance costs $ 1,124 133,674 134,798
Stock-based compensation expense 191,380 191,380
Net loss (2,747,809) (2,558,815)
Balance (in shares) at Mar. 31, 2020 34,604,436      
Balance at Mar. 31, 2020 $ 34,605 112,149,913 (94,471,887) 17,901,625
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 181,280 181,280
Net loss (4,643,919) (4,643,919)
Sale of common stock, net of issuance costs (in shares) 33,658,538      
Sale of common stock, net of issuance costs $ 33,658 31,060,644 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 2,201,450
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