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Intangible Asset - Schedule of Carrying Value of Intangible Asset (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]    
Technology rights $ 32,081 $ 20,081
Accumulated amortization (7,898) (6,264)
Intangible asset, net $ 24,183 $ 13,817