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Summary of Maturity of Operating Lease Liabilities (Detail)
$ in Thousands
Sep. 30, 2019
USD ($)
Operating Lease Liabilities Payments Due [Abstract]  
2019 $ 496
2020 1,202
2021 1,165
2022 975
2023 729
After 2023 1,140
Total lease payments 5,707
Less: Interest 874
Present value of lease liabilities $ 4,833