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CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS EQUITY - USD ($) | Total | Series A, Preferred Stock | Series B, Preferred Stock | Common Stock | Additional Paid-In Capital | Accumulated Deficit
--- | --- | --- | --- | --- | --- | ---
Balance, shares at Dec. 31, 2018 |  | 813,624 | 2,666,667 | 2,738,508 |  |
Balance, amount at Dec. 31, 2018 | $ 25,304,422 | $ 813 | $ 2,667 | $ 2,738 | $ 129,359,799 | $ (104,061,595)
Conversion of Preferred Stock to Common Stock, shares |  | (55,854) |  | 5,800 |  |
Conversion of Preferred Stock to Common Stock, amount | 0 | $ (56) | $ 0 | $ 6 | 50 | 0
Common stock issued - registered offerings - net of offering costs, shares |  |  |  | 508,063 |  |
Common stock issued - registered offerings - net of offering costs, amount | 3,750,454 | $ 0 | $ 0 | $ 508 | 3,749,946 | 0
Stock-based compensation | 822,820 | 0 | 0 | 0 | 822,820 | 0
Net loss | (10,676,747) | $ 0 | $ 0 | $ 0 | 0 | (10,676,747)
Balance, shares at Dec. 31, 2019 |  | 757,770 | 2,666,667 | 3,252,371 |  |
Balance, amount at Dec. 31, 2019 | 19,200,949 | $ 757 | $ 2,667 | $ 3,252 | 133,932,615 | (114,738,342)
Conversion of Preferred Stock to Common Stock, shares |  | (57,892) |  | 6,327 |  |
Conversion of Preferred Stock to Common Stock, amount | 0 | $ (58) | $ 0 | $ 6 | 52 | 0
Common stock issued - registered offerings - net of offering costs, shares |  |  |  | 3,304,412 |  |
Common stock issued - registered offerings - net of offering costs, amount | 12,353,533 | $ 0 | $ 0 | $ 3,305 | 12,350,228 | 0
Stock-based compensation | 53,341 | 0 | 0 | 0 | 53,341 |
Net loss | (14,417,266) | $ 0 | $ 0 | $ 0 | 0 | (14,417,266)
Common stock issued for services, shares |  |  |  | 4,000 |  |
Common stock issued for services, amount | 17,000 | $ 0 | $ 0 | $ 4 | 16,996 | 0
Balance, shares at Dec. 31, 2020 |  | 699,878 | 2,666,667 | 6,567,110 |  |
Balance, amount at Dec. 31, 2020 | $ 17,207,557 | $ 699 | $ 2,667 | $ 6,567 | $ 146,353,232 | $ (129,155,608)

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