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Estimated Future Amortization Expense of Purchased Intangible Assets with Definite Lives (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]    
2020 $ 2,571  
2021 1,116  
2022 1,116  
2023 1,039  
2024 963  
Thereafter 3,299  
Intangible assets, net $ 10,104 $ 10,980