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Consolidated Statements of Operations - USD ($)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Grant revenue $ 81,526 $ 385,501
Operating expenses:    
Research and development 9,123,479 15,554,171
General and administrative 4,986,611 3,577,153
Total operating expenses 14,110,090 19,131,324
Loss from operations (14,028,564) (18,745,823)
Other income:    
Interest income 7,439 4,736
Interest expense 0 (1,286)
Gain on debt extinguishment 0 172,056
Total other income (expense) 7,439 175,506
Net loss $ (14,021,125) $ (18,570,317)
Basic and diluted:    
Net loss per common share (in dollars per share) $ (0.83) $ (3.04)
Weighted average shares outstanding (in shares) 16,973,194 6,099,933