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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
Issuance of warrants in connection with consulting agreement 11,200 11,200
Refund of costs related to equity raise 13,147 13,147
Conversion of preferred stock to common stock $ (341,070) $ 9 341,061
Conversion of preferred stock to common stock, shares (68,214)   86,323      
Net 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      
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 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