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BUSINESS COMBINATION AND REVERSE RECAPITALIZATION - Additional Information (Details)
$ / shares in Units, $ in Thousands
 1 Months Ended 12 Months Ended
Nov. 17, 2020
USD ($)
$ / shares
shares
Nov. 16, 2020
USD ($)
$ / shares
shares
Jul. 15, 2020
USD ($)
shares
Dec. 31, 2020
shares
Dec. 31, 2022
USD ($)
$ / shares
Dec. 31, 2021
USD ($)
$ / shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
$ / shares
shares
Business Acquisition [Line Items]                
Merger exchange ratio 59,908.35              
Common stock, par value (usd per share) | $ / shares $ 0.0001       $ 0.0001 $ 0.0001    
Capitalized expenditures         $ 361,200 $ 138,000 $ 26,200  
Direct and incremental costs $ 33,500              
Costs recorded to additional paid-in capital 28,200              
Costs expensed to general and administrative expenses $ 3,300              
Earnout Shares | FVAP                
Business Acquisition [Line Items]                
Earnout shares (shares) | shares 12,860,000              
Estimated fair value of Earnout Shares $ 171,200              
MPMO Earnout Shares | FVAP                
Business Acquisition [Line Items]                
Estimated fair value of Earnout Shares 134,000              
SNR Earnout Shares | FVAP                
Business Acquisition [Line Items]                
Estimated fair value of Earnout Shares $ 37,200              
SNR                
Business Acquisition [Line Items]                
Stock issued for asset acquisition (shares) | shares 19,999,942              
Total cost of acquisition $ 324,100              
Deferred tax liability (109,100)              
Asset acquisition, transaction costs 2,000              
SNR | Mineral rights                
Business Acquisition [Line Items]                
Capitalized expenditures $ 434,700              
MPMO | Conversion of common and preferred units into common stock                
Business Acquisition [Line Items]                
Conversion of stock, shares issued (shares) | shares 71,941,538              
Private Placement                
Business Acquisition [Line Items]                
Common stock sold (shares) | shares 20,000,000              
Common stock sold, aggregate purchase price     $ 200,000          
Earnout Shares                
Business Acquisition [Line Items]                
Common stock issuances (shares) | shares       12,859,898        
Vesting Shares                
Business Acquisition [Line Items]                
Common stock issuances (shares) | shares       8,625,000        
MPMO                
Business Acquisition [Line Items]                
Common unit, outstanding (shares) | shares               1,000
Common units, par value (usd per share) | $ / shares               $ 0
Preferred units, outstanding (shares) | shares   200.86           110.98
Preferred units, par value (usd per share) | $ / shares   $ 0           $ 0
Preferred units issued (shares) | shares   89.88            
MPMO | SNR                
Business Acquisition [Line Items]                
Liability related to minimum royalty   $ 3,900            
Sponsor                
Business Acquisition [Line Items]                
Number of warrants exchanged (shares) | shares     5,933,333          
Stock issued upon conversion of warrants (shares) | shares     890,000