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Condensed Consolidated Statements of Operations - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Revenues:        
Revenue from collaborative arrangements and other contracts $ 100,762 $ 225,971 $ 100,762 $ 340,914
Operating expenses:        
Research and development 23,090,989 23,743,970 44,001,307 53,920,481
General and administrative 10,206,686 13,523,098 20,781,337 27,413,708
Total operating expenses 33,297,675 37,267,068 64,782,644 81,334,189
Loss from operations (33,196,913) (37,041,097) (64,681,882) (80,993,275)
Other income (expense):        
Interest income 1,307,358 2,168,233 2,807,648 4,375,404
Interest expense 0 (313,488) (177,833) (626,976)
(Loss) gain on investment in affiliated entity (334,294) 156,745 (460,312) 773,384
Net unrealized (loss) gain on available-for-sale equity securities (20,820) 922,941 480,057 4,141,156
Other income (expense), net 7,571 (1,427,867) (674,647) (3,853,543)
Net loss $ (32,237,098) $ (35,534,533) $ (62,706,969) $ (76,183,850)
Net loss per share        
Basic (in dollars per share) [1] $ (1.19) $ (1.61) $ (2.48) $ (3.50)
Diluted (in dollars per share) [1] $ (1.19) $ (1.61) $ (2.48) $ (3.50)
Weighted average number of common shares used to compute net loss per share        
Basic (in shares) [1] 27,197,802 22,029,486 25,244,657 21,784,343
Diluted (in shares) [1] 27,197,802 22,029,486 25,244,657 21,784,343
[1] Share and per share amounts have been restated to reflect the 1-for-12 reverse stock split effected in January 2024 on a retroactive basis for all periods presented.