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Leases - Summary of maturities of lease matirities (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Operating Leases [Member]  
2021 $ 1,304
2022 1,090
2023 870
2024 512
2025 258
Undiscounted lease cash flow commitments 4,034
Reconciling impact from discounting (72)
Lease liabilities on consolidated balance sheet as of December 31, 2020 3,962
Finance Leases [Member]  
2021 30
2022 9
Undiscounted lease cash flow commitments 39
Reconciling impact from discounting (4)
Lease liabilities on consolidated balance sheet as of December 31, 2020 $ 35