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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       25,529   25,529
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       11,200   11,200
Refund of costs related to equity raise       13,147   13,147
Net (loss) income         503,543 503,543
Balance at Mar. 31, 2019 $ 855,955 $ 21,952,000 $ 1,767 34,465,425 (48,229,052) 9,046,095
Balance, shares at Mar. 31, 2019 171,191 21,952 17,666,193      
Provision for compensation expense related to stock options       303,243   303,243
Issuance of warrants in connection with consulting agreement       32,000   32,000
Refund of costs related to equity raise       10,000   10,000
Net (loss) income         (309,946) (309,946)
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      
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 171,815 171,815
Issuance of warrants in connection with consulting agreement 43,999 43,999
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 (loss) income 51,685 51,685
Balance at Mar. 31, 2020 $ 855,955 $ 21,952,000 $ 2,135 35,660,429 (48,103,495) 10,367,024
Balance, shares at Mar. 31, 2020 171,191 21,952 21,351,643      
Provision for compensation expense related to stock options 452,033 452,033
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 95,481 95,481
Net (loss) income (262,062) (262,062)
Balance at Jun. 30, 2020 $ 851,660 $ 21,952,000 $ 2,136 $ 36,214,871 $ (48,365,557) $ 10,665,110
Balance, shares at Jun. 30, 2020 170,332 21,952 21,356,112