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Intangible Asset - Schedule of Estimated Future Amortization Expense (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]    
2020 $ 1,442  
2021 1,442  
2022 1,442  
2023 1,442  
2024 1,442  
Thereafter 8,048  
Intangible asset, net $ 15,258 $ 7,480