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Leases - Summary of Components of Lease Expense (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Components of lease expense    
Operating lease cost $ 2,957 $ 3,138
Finance lease cost    
Amortization of right-of-use assets 66 67
Interest on lease liabilities 9 11
Total lease cost $ 3,032 $ 3,216