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Leases - Summary of Lease Cost (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Leases [Abstract]        
Operating lease cost $ 400 $ 458 $ 1,806 $ 1,347
Total lease cost $ 400 $ 458 $ 1,806 $ 1,347