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TRANSACTIONS - Base Resources Acquisition (Details) $ in Thousands			1 Months Ended	12 Months Ended
	Oct. 02, 2024 USD ($) shares	Aug. 16, 2024 USD ($)	Jan. 31, 2018 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 16, 2024 USD ($)	Oct. 02, 2024 $ / shares	Dec. 19, 2019 USD ($)
Business Acquisition [Line Items]
Fair value of contingent consideration		$ 1,690
Payment for Contingent Consideration Liability, Investing Activities				$ 16,830	$ 0	$ 0
Base Resources Limited [Member]
Business Acquisition [Line Items]
Per Share Conversion of Base Resources Shares on Acquisition Date | shares	0.0260
Total EFI Equity Consideration in Base Combination	$ 178,438
Partners' Capital, Distribution Amount Per Share | $ / shares								$ 0.065
Base Resources Special Dividend	55,080
Total purchase price	$ 178,438
Base Resources Limited [Member] | Toliara Project Asset Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Payment of Deferred Consideration							$ 16,830		$ 170
Total purchase price			$ 75,000
Business Acquisition, Percentage of Voting Interests Acquired			85.00%
Business Combination, Contingent Consideration, Liability			$ 17,000

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