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Leases - Maturities of Lease Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Disclosure Of Leases [Abstract]    
2020 $ 867  
2021 889  
2022 849  
2023 815  
2024 830  
Thereafter 346  
Total lease payments 4,596  
Less imputed interest (1,217)  
Total operating lease liabilities 3,379  
Less: current portion 481 $ 0
Non-current portion $ 2,898 $ 0