XML 15 R5.htm IDEA: XBRL DOCUMENT v3.21.1
Statements of Stockholders' Equity (Unaudited) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Total
Balance at Dec. 31, 2019 $ 16,042 $ 128,668,583 $ (116,935,112) $ 11,749,513
Balance, shares at Dec. 31, 2019 16,041,650      
Stock-based compensation expense 86,042 86,042
Exercise of stock options, net of cashless exercise of shares $ 115 125,172 125,287
Exercise of stock options, net of cashless exercise of shares, shares 115,307      
Exercise of warrants $ 50 109,950 110,000
Exercise of warrants, shares 50,000      
Issuance of shares for vested restricted stock grants $ 3 (3)
Issuance of shares for vested restricted stock grants, shares 2,670      
Net loss 26,602 26,602
Balance at Mar. 31, 2020 $ 16,210 128,989,744 (116,908,510) 12,097,444
Balance, shares at Mar. 31, 2020 16,209,627      
Balance at Dec. 31, 2020 $ 18,410 138,569,746 (116,376,715) 22,211,441
Balance, shares at Dec. 31, 2020 18,410,458      
Stock-based compensation expense 980,633 980,633
Exercise of stock options, net of cashless exercise of shares $ 274 (274)
Exercise of stock options, net of cashless exercise of shares, shares 274,179      
Issuance of shares for vested restricted stock grants $ 2 (2)
Issuance of shares for vested restricted stock grants, shares 1,754      
Net loss (1,060,066) (1,060,066)
Balance at Mar. 31, 2021 $ 18,686 $ 139,550,103 $ (117,436,781) $ 22,132,008
Balance, shares at Mar. 31, 2021 18,686,391