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 $ 1,246,151 $ 1,097,997
Accrued research and development   524,861
Accrued legal expenses 205,579 253,730
Other accrued expenses 124,557 186,509
Total $ 1,576,287 $ 2,063,097