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Segment and Geographic Information - Summary of Finance and Operating Lease Right of Use Assets by Geographical Location (Detail) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Total finance lease right-of-use assets $ 39,602 $ 0
Total operating lease right-of-use assets 1,931 0
United States [Member]    
Total finance lease right-of-use assets 39,237 0
Total operating lease right-of-use assets 75 0
China [Member]    
Total finance lease right-of-use assets 365 0
Total operating lease right-of-use assets $ 1,856 $ 0