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Intangible Asset - Schedule of Estimated Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Goodwill And Intangible Assets Disclosure [Abstract]    
2021 $ 1,442  
2022 1,442  
2023 1,442  
2024 1,442  
2025 1,442  
Thereafter 6,607  
Intangible asset, net $ 13,817 $ 15,258