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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
Warrants Issued in Connection with Convertible Notes [Member]
Common Stock [Member]
Warrants Issued in Connection with Convertible Notes [Member]
Additional Paid-in Capital [Member]
Warrants Issued in Connection with Convertible Notes [Member]
Retained Earnings [Member]
Warrants Issued in Connection with Convertible Notes [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2019         1,812,483      
Balance at Dec. 31, 2019         $ 182 $ 87,437,661 $ (89,723,016) $ (2,285,173)
Share-based compensation         0 512,719 0 512,719
Net loss         $ 0 0 (3,370,282) (3,370,282)
Issuance of common stock pursuant to securities purchase agreements (in shares)         87,500      
Issuance of common stock pursuant to securities purchase agreements         $ 8 1,032,492 0 1,032,500
Commitment fee adjustment         0 (900,000) 0 (900,000)
Beneficial conversion feature         $ 0 641,215 0 641,215
Issuance of common stock pursuant to warrant conversion (in shares)         121,500      
Issuance of common stock pursuant to warrant conversion         $ 12 1,457,988 0 1,458,000
Conversion of convertible note payable (in shares)         288,461      
Conversion of convertible note payable         $ 29 1,499,971 0 1,500,000
Deemed dividends related to down-round features         $ 0 112,686 (112,686) 0
Issuance of common stock pursuant to public offering (in shares)         87,500      
Issuance of common stock pursuant to public offering         $ 8 1,032,492 0 1,032,500
Balance (in shares) at Mar. 31, 2020         2,309,944      
Balance at Mar. 31, 2020         $ 231 91,794,732 (93,205,984) (1,411,021)
Balance (in shares) at Dec. 31, 2019         1,812,483      
Balance at Dec. 31, 2019         $ 182 87,437,661 (89,723,016) (2,285,173)
Net loss               (8,236,543)
Balance (in shares) at Sep. 30, 2020         7,808,110      
Balance at Sep. 30, 2020         $ 782 119,753,918 (98,072,245) 21,682,455
Balance (in shares) at Mar. 31, 2020         2,309,944      
Balance at Mar. 31, 2020         $ 231 91,794,732 (93,205,984) (1,411,021)
Issuance of common stock for directors’ fees (in shares)         2,143      
Issuance of common stock for directors’ fees         $ 1 15,006 0 15,007
Legal and commitment fees         0 (199,328) 0 (199,328)
Share-based compensation         0 33,177 0 33,177
Net loss         $ 0 0 (1,572,709) (1,572,709)
Issuance of common stock pursuant to securities purchase agreements (in shares)         31,440      
Issuance of common stock pursuant to securities purchase agreements         $ 3 145,330 0 145,333
Conversion of convertible note payable (in shares)         440,192      
Conversion of convertible note payable         $ 44 2,288,956 0 2,289,000
Warrants issued $ 0 $ 1,388,339 $ 0 $ 1,388,339 $ 0 94,655 0 94,655
Issuance of common stock pursuant to public offering (in shares)         31,440      
Issuance of common stock pursuant to public offering         $ 3 145,330 0 145,333
Balance (in shares) at Jun. 30, 2020         2,783,719      
Balance at Jun. 30, 2020         $ 279 95,560,867 (94,778,693) 782,453
Issuance of common stock for directors’ fees (in shares)         1,291      
Issuance of common stock for directors’ fees         $ 1 7,002 0 7,003
Legal and commitment fees         $ 0 (2,171,896) 0 (2,171,896)
Issuance of restricted common stock to employees (in shares)         38,250      
Issuance of restricted common stock to employees         $ 4 (4) 0 0
Share-based compensation         0 34,306 0 34,306
Net loss         $ 0 0 (3,293,552) (3,293,552)
Issuance of common stock pursuant to securities purchase agreements (in shares)         4,264,312      
Issuance of common stock pursuant to securities purchase agreements         $ 426 22,173,999 0 22,174,425
Commitment fee adjustment         $ (8) 8 0 0
Issuance of common stock pursuant to warrant conversion (in shares)         795,538      
Issuance of common stock pursuant to warrant conversion         $ 80 4,136,715 0 4,136,795
Warrants issued         $ 0 12,921 0 12,921
Issuance of common stock pursuant to public offering (in shares)         4,264,312      
Issuance of common stock pursuant to public offering         $ 426 22,173,999 0 22,174,425
Commitment fee adjustment (in shares)         (75,000)      
Balance (in shares) at Sep. 30, 2020         7,808,110      
Balance at Sep. 30, 2020         $ 782 119,753,918 (98,072,245) 21,682,455
Balance (in shares) at Dec. 31, 2020         7,814,572      
Balance at Dec. 31, 2020         $ 782 119,844,026 (99,509,689) 20,335,119
Issuance of common stock for directors’ fees (in shares)         2,091      
Issuance of common stock for directors’ fees         $ 0 7,510 0 7,510
Legal and commitment fees         $ 0 (2,709) 0 (2,709)
Issuance of restricted common stock to employees (in shares)         1,250      
Issuance of restricted common stock to employees         $ 0 0 0 0
Share-based compensation         0 133,638 0 133,638
Net loss         $ 0 0 (851,431) (851,431)
Balance (in shares) at Mar. 31, 2021         7,817,913      
Balance at Mar. 31, 2021         $ 782 119,982,465 (100,361,120) 19,622,127
Balance (in shares) at Dec. 31, 2020         7,814,572      
Balance at Dec. 31, 2020         $ 782 119,844,026 (99,509,689) 20,335,119
Net loss               (3,036,761)
Balance (in shares) at Sep. 30, 2021         7,825,299      
Balance at Sep. 30, 2021         $ 783 120,079,118 (102,546,450) 17,533,451
Balance (in shares) at Mar. 31, 2021         7,817,913      
Balance at Mar. 31, 2021         $ 782 119,982,465 (100,361,120) 19,622,127
Issuance of common stock for directors’ fees (in shares)         1,748      
Issuance of common stock for directors’ fees         $ 0 5,505 0 5,505
Legal and commitment fees         $ 0 (2,519) 0 (2,519)
Issuance of restricted common stock to employees (in shares)         1,250      
Issuance of restricted common stock to employees         $ 0 0 0 0
Share-based compensation         0 35,618 0 35,618
Net loss         $ 0 0 (1,161,683) (1,161,683)
Restricted stock forfeited (in shares)         (1,250)      
Restricted stock forfeited         $ 0 0 0 0
Balance (in shares) at Jun. 30, 2021         7,819,661      
Balance at Jun. 30, 2021         $ 782 120,021,069 (101,522,803) 18,499,048
Issuance of common stock for directors’ fees (in shares)         1,888      
Issuance of common stock for directors’ fees         $ 0 6,008 0 6,008
Issuance of restricted common stock to employees (in shares)         3,750      
Issuance of restricted common stock to employees         $ 1 0 0 1
Share-based compensation         0 52,041 0 52,041
Net loss         $ 0 0 (1,023,647) (1,023,647)
Balance (in shares) at Sep. 30, 2021         7,825,299      
Balance at Sep. 30, 2021         $ 783 $ 120,079,118 $ (102,546,450) $ 17,533,451