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Consolidated Statements of Changes in Stockholders' Equity (unaudited) - USD ($)
Series 1 Convertible Preferred Stock
Series 2 Convertible Preferred Stock
Common Stock
Additional Paid in Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2018 $ 1,197,025 $ 21,952,000 $ 1,758 $ 34,074,488 $ (48,732,595) $ 8,492,676
Balance, shares at Dec. 31, 2018 239,405 21,952 17,579,870      
Provision for compensation expense related to stock options       328,772   328,772
Conversion of preferred stock to common stock $ (341,070) $ 9 341,061
Conversion of preferred stock to common stock, shares (68,214) 86,323      
Issuance of warrants in connection with consulting agreement 43,200 43,200
Refund of costs related to equity raise       23,147   23,147
Net income         193,597 193,597
Balance at Jun. 30, 2019 $ 855,955 $ 21,952,000 $ 1,767 34,810,668 (48,538,998) 9,081,392
Balance, shares at Jun. 30, 2019 171,191 21,952 17,666,193      
Provision for compensation expense related to stock options 117,133 117,133
Issuance of warrants in connection with consulting agreement 41,619 41,619
Refund of costs related to equity raise  
Net income         1,387,982 1,387,982
Balance at Sep. 30, 2019 $ 855,955 $ 21,952,000 $ 1,767 34,969,420 (47,151,016) 10,628,126
Balance, shares at Sep. 30, 2019 171,191 21,952 17,666,193      
Balance at Dec. 31, 2019 $ 855,955 $ 21,952,000 $ 1,779 35,313,721 (48,155,180) 9,968,275
Balance, shares at Dec. 31, 2019 171,191 21,952 17,783,960      
Provision for compensation expense related to stock options       623,848   623,848
Exercise of stock options into common stock   $ 1 2,633 2,634
Exercise of stock options into common stock, shares     3,333      
Conversion of preferred stock to common stock $ (4,295) 4,295
Conversion of preferred stock to common stock, shares (859) 1,136      
Issuance of warrants in connection with consulting agreement       139,480   139,480
Exercise of warrants into common stock $ 10 131,240 131,250
Exercise of warrants into common stock, shares     105,000      
Exchange offer of warrants $ 346 (346)
Exchange offer of warrants, shares     3,462,683      
Net income         (262,062) (262,062)
Balance at Jun. 30, 2020 $ 851,660 $ 21,952,000 $ 2,136 36,214,871 (48,365,557) 10,655,110
Balance, shares at Jun. 30, 2020 170,332 21,952 21,356,112      
Provision for compensation expense related to stock options       169,393 169,393
Exercise of stock options into common stock 2,633 2,633
Exercise of stock options into common stock, shares     3,333      
Issuance of warrants in connection with consulting agreement 119,560 119,560
Net income         289,360 289,360
Balance at Sep. 30, 2020 $ 851,660 $ 21,952,000 $ 2,136 $ 36,506,457 $ (48,076,197) $ 11,236,056
Balance, shares at Sep. 30, 2020 170,332 21,952 21,359,445