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FAIR VALUE ACCOUNTING - Narrative (Details)
$ in Thousands
2 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
mi
Feb. 14, 2023
mi
Jan. 24, 2023
shares
Mar. 31, 2023
USD ($)
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Dec. 31, 2022
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Change In Value Of Investments Accounted At Fair Value         $ (2,959) $ (3,418)  
Convertible Note, decrease in fair value       $ 740      
Measurement Input, Price Volatility              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Notes Receivable, Fair Value Measurement Input | mi 0.60 0.60          
Measurement Input, Yield              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Notes Receivable, Fair Value Measurement Input | mi 0.106 0.095          
Virginia Energy Resources Inc. | CUR              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Business Acquisition, Percentage of Voting Interests Acquired     100.00%        
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share | shares     0.26        
Business Combination, Number of Common Stock Shares Acquired | shares     9,439,857        
Business Combination, Acquired Shares Converted To Common Stock | shares     2,454,362        
Virginia Energy Resources Inc. | Energy Fuels              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Business Combination, Shares Converted Into Common Stock | shares     16,189,548        
CUR | Energy Fuels              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Business Acquisition, Percentage of Voting Interests Acquired     16.70%        
Virginia Energy Resources Inc.              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Percentage Of Fair Value Investment             13.50%
Virginia Energy Resources Inc. | Level 1              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Investments accounted for at fair value             $ 2,830
Consolidated Uranium Inc.              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Percentage Of Fair Value Investment         16.30%   17.40%
Investments accounted for at fair value $ 16,370     $ 16,370 $ 16,370    
Consolidated Uranium Inc. | Level 1              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Investments accounted for at fair value             $ 16,500