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Intangible Assets, Net - Summary of Intangible Assets (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Finite Lived Intangible Assets Net [Abstract]    
Intangible assets $ 19,773 $ 19,773
Less accumulated amortization $ (19,773) (17,273)
Total   $ 2,500