Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Detail)

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Accrued Expenses (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Accrued Liabilities Current [Abstract]    
External research and preclinical development $ 7,190 $ 4,702
Employee compensation and benefits 3,896 5,715
Professional fees 683 602
Facilities and other 70 65
Accrued expenses $ 11,839 $ 11,084