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Leases - Maturities of Lease Liabilities (Detail) - USD ($)
Dec. 31, 2019
Jan. 01, 2019
2020 $ 1,657,000  
2021 995,000  
2022 695,000  
2023 606,000  
2024 587,000  
Thereafter 171,000  
Total lease payments 4,711,000  
Less: Imputed interest 336,000  
Present value of lease liabilities $ 4,375,000 $ 4,455,000