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Condensed Statements of Operations (Unaudited) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Revenue        
Total revenue $ 1,267,361 $ 3,589,708 $ 1,933,980 $ 21,743,309
Revenue from Contract with Customer, Product and Service [Extensible Enumeration] Grant Revenue [Member] Grant Revenue [Member] Grant Revenue [Member] Grant Revenue [Member]
Operating expenses        
Research and development $ 4,019,718 $ 7,352,978 $ 12,217,569 $ 29,300,405
General and administrative 2,570,565 4,044,046 8,917,960 13,500,512
Total operating expenses 6,590,283 11,397,024 21,135,529 42,800,917
Loss from operations (5,322,922) (7,807,316) (19,201,549) (21,057,608)
Changes in fair value of warrant liabilities 178,758 782,962 (96,172) 10,362,614
Interest expense (69,700) (70,626) (237,405) (213,885)
Interest income 14,364 17,385 100,920 41,143
Other income 97,183 1,527 97,183 1,527
Total other income (expense) 220,605 731,248 (135,474) 10,191,399
Loss before income taxes (5,102,317) (7,076,068) (19,337,023) (10,866,209)
Net loss $ (5,102,317) $ (7,076,068) $ (19,337,023) $ (10,866,209)
Earnings Per Share [Abstract]        
Basic loss per common share $ (0.1) $ (0.16) $ (0.38) $ (0.25)
Diluted loss per common share $ (0.1) $ (0.16) $ (0.38) $ (0.25)
Weighted-average common shares outstanding - basic 52,406,002 43,030,885 51,084,636 43,042,379
Weighted-average common shares outstanding - diluted 52,406,002 43,030,885 51,084,636 43,042,379