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PROPERTY, PLANT AND EQUIPMENT - Construction in Progress & Impairment of Property, Plant and Equipment (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Jul. 23, 2021
USD ($)
Jun. 22, 2021
a
Property, Plant and Equipment [Line Items]        
Impairment $ 0 $ 0    
Alabama Graphite        
Property, Plant and Equipment [Line Items]        
Acres of land under lease | a       70
Term of lease       10 years
Land grant $ 1,400   $ 1,400