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Statements of Stockholders' Equity - USD ($)
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2019 $ 43,465 $ 412,599,772 $ (258,442,650) $ 154,200,587
Balance, shares at Dec. 31, 2019 43,466,933      
Exercise of options $ 116 129,856   129,972
Exercise of options, shares 116,046      
Stock-based compensation   1,822,148   1,822,148
Net loss     (7,662,604) (7,662,604)
Balance at Mar. 31, 2020 $ 43,581 414,551,776 (266,105,254) 148,490,103
Balance, shares at Mar. 31, 2020 43,582,979      
Balance at Dec. 31, 2019 $ 43,465 412,599,772 (258,442,650) 154,200,587
Balance, shares at Dec. 31, 2019 43,466,933      
Balance at Sep. 30, 2020 $ 47,829 432,124,717 (293,906,818) 138,265,728
Balance, shares at Sep. 30, 2020 47,828,831      
Balance at Mar. 31, 2020 $ 43,581 414,551,776 (266,105,254) 148,490,103
Balance, shares at Mar. 31, 2020 43,582,979      
Issuance of common stock, net of issuance costs $ 3,127 9,571,010   9,574,137
Issuance of common stock, net of issuance costs, shares 3,126,709      
Exercise of options $ 5 5,606   5,611
Exercise of options, shares 5,010      
Stock-based compensation   1,761,674   1,761,674
Net loss     (14,079,029) (14,079,029)
Balance at Jun. 30, 2020 $ 46,713 425,890,066 (280,184,283) 145,752,496
Balance, shares at Jun. 30, 2020 46,714,698      
Issuance of common stock, net of issuance costs $ 1,012 4,544,404   4,545,416
Issuance of common stock, net of issuance costs, shares 1,010,033      
Exercise of options and vesting of restricted stock units $ 104 (104)    
Exercise of options and vesting of restricted stock units, shares 104,100      
Stock-based compensation   1,690,351   1,690,351
Net loss     (13,722,535) (13,722,535)
Balance at Sep. 30, 2020 $ 47,829 432,124,717 (293,906,818) 138,265,728
Balance, shares at Sep. 30, 2020 47,828,831      
Balance at Dec. 31, 2020 $ 49,018 437,639,991 (309,469,553) 128,219,456
Balance, shares at Dec. 31, 2020 49,017,622      
Issuance of common stock, net of issuance costs $ 2,517 9,557,182   9,559,699
Issuance of common stock, net of issuance costs, shares 2,517,603      
Exercise of options $ 4 4,235   4,239
Exercise of options, shares 3,785      
Stock-based compensation   1,614,185   1,614,185
Net loss     (14,274,059) (14,274,059)
Balance at Mar. 31, 2021 $ 51,539 448,815,593 (323,743,612) 125,123,520
Balance, shares at Mar. 31, 2021 51,539,010      
Balance at Dec. 31, 2020 $ 49,018 437,639,991 (309,469,553) 128,219,456
Balance, shares at Dec. 31, 2020 49,017,622      
Balance at Sep. 30, 2021 $ 51,739 451,989,203 (355,475,194) 96,565,748
Balance, shares at Sep. 30, 2021 51,738,894      
Balance at Mar. 31, 2021 $ 51,539 448,815,593 (323,743,612) 125,123,520
Balance, shares at Mar. 31, 2021 51,539,010      
Stock-based compensation   1,562,161   1,562,161
Net loss     (14,399,261) (14,399,261)
Balance at Jun. 30, 2021 $ 51,539 450,377,754 (338,142,873) 112,286,420
Balance, shares at Jun. 30, 2021 51,539,010      
Exercise of options and vesting of restricted stock units $ 200 20,590   20,790
Exercise of options and vesting of restricted stock units, shares 199,884      
Stock-based compensation   1,590,859   1,590,859
Net loss     (17,332,321) (17,332,321)
Balance at Sep. 30, 2021 $ 51,739 $ 451,989,203 $ (355,475,194) $ 96,565,748
Balance, shares at Sep. 30, 2021 51,738,894