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Accrued Expenses - Summary of Accrued Expenses (Details) - USD ($)
Mar. 31, 2022
Dec. 31, 2021
Accrued Expenses    
Accrued research and development expenses $ 7,401,146 $ 5,824,365
Accrued bonuses 1,051,123 2,152,302
Accrued consulting and other professional fees 347,476 299,607
Accrued employee benefits 567,386 348,752
Other accrued expenses 109,895 90,342
Accrued expenses $ 9,477,026 $ 8,715,368