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SHAREHOLDERS' DEFICIT - Mudrick Share Issuance (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 01, 2021
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
STOCKHOLDERS' EQUITY        
Other financing costs   $ 2.0 $ 26.1 $ 19.9
Mudrick Capital Management LP        
STOCKHOLDERS' EQUITY        
Other financing costs $ 0.1      
AMC Preferred Equity Units | Mudrick Capital Management LP        
STOCKHOLDERS' EQUITY        
Number of shares sold 850,000      
Common Stock | Mudrick Capital Management LP        
STOCKHOLDERS' EQUITY        
Gross proceeds $ 230.5