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Intangible Assets Other Than Goodwill - Future Amortization Expenses (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
2020 $ 1,158  
2021 1,015  
2022 1,015  
Net Amount $ 3,188 $ 17,312