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Property, Plant and Equipment - Summary of Software Assets under Capital Lease (Detail) - Software - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Software   $ 16,715
Software $ 16,715  
Less accumulated depreciation   (6,221)
Less accumulated depreciation (11,989)  
Financed equipment—net   $ 10,494
Financed equipment—net $ 4,726