Annual report pursuant to Section 13 and 15(d)

Accrued Expenses - Summary of Accrued Expenses (Detail)

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Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accrued compensation costs $ 2,068,922 $ 1,621,008
Accrued research and clinical development service fees 801,310 3,865,146
Accrued professional fees 456,440 842,613
Accrued facilities operation expenses 172,987 231,477
Accrued insurance costs 3,942 180,158
Other accrued expenses 106,121 63,387
Total accrued expenses $ 3,609,722 $ 6,803,789