Annual report pursuant to Section 13 and 15(d)

PROPERTY, PLANT AND EQUIPMENT - Additional Information (Detail)

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PROPERTY, PLANT AND EQUIPMENT - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 10, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Line Items]        
Depreciation and depletion expense   $ 20,400 $ 1,500 $ 500
Future proceeds from sale of assets   $ 1,384 $ 0  
Non-operating Interests        
Property, Plant and Equipment [Line Items]        
Consideration from sale of assets $ 14,800      
Gain on sale of assets 4,200      
Non-operating Interests | On or Before March 31, 2020        
Property, Plant and Equipment [Line Items]        
Future proceeds from sale of assets 1,200      
Non-operating Interests | Cash        
Property, Plant and Equipment [Line Items]        
Consideration from sale of assets 6,200      
Non-operating Interests | Prepaid expenses and other current assets        
Property, Plant and Equipment [Line Items]        
Consideration from sale of assets $ 7,400