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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($)
Common Stock
Additional Paid- in Capital
Accumulated Deficit
Total
Beginning Balance at Dec. 31, 2020 $ 50,731 $ 383,533,326 $ (356,239,484) $ 27,344,573
Beginning Balance, Shares at Dec. 31, 2020 50,731,072      
Issuance of common stock for cash (net of offering cost of $3.9 million) $ 32,283 52,520,475   52,552,758
Issuance of common stock for cash (net of offering cost of $3.9 million), Shares 32,282,857      
Stock-based compensation $ 0 1,377,038 0 1,377,038
Stock-based compensation (in shares) 0      
Net loss $ 0 0 (8,779,450) (8,779,450)
Ending Balance at Mar. 31, 2021 $ 83,014 437,430,839 (365,018,934) 72,494,919
Ending Balance, Shares at Mar. 31, 2021 83,013,929      
Beginning Balance at Dec. 31, 2021 $ 83,079 442,020,871 (398,118,355) 43,985,595
Beginning Balance, Shares at Dec. 31, 2021 83,078,675      
Stock-based compensation $ 372 1,630,305 0 1,630,677
Stock-based compensation (in shares) 372,512      
Net loss $ 0 0 (9,910,508) (9,910,508)
Ending Balance at Mar. 31, 2022 $ 83,451 $ 443,651,176 $ (408,028,863) $ 35,705,764
Ending Balance, Shares at Mar. 31, 2022 83,451,187