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Operating Leases - Lease Liability Maturities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Leases [Abstract]    
July 1, 2020 - December 31, 2020 $ 674  
2021 1,199  
2022 1,201  
2023 1,198  
2024 1,161  
Thereafter 97  
Total undiscounted lease payments 5,530  
Less imputed interest (440)  
Total lease liabilities $ 5,090 $ 3,800