INVESTMENTS ACCOUNTED FOR AT FAIR VALUE (Details) $ / shares in Units, $ in Thousands, $ in Thousands, $ in Thousands						12 Months Ended
	Dec. 05, 2023 shares	Nov. 29, 2023 AUD ($) shares	Oct. 19, 2023 CAD ($) $ / shares shares	Jan. 24, 2023 shares	Oct. 27, 2021	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change In Value Of Investments Accounted At Fair Value | $						$ 15,472
Investments (Note 6) | $						1,356	$ 19,329
Business Acquisition, Number Of Common Stock Shares Acquired	8,501,424
Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of fair value investment					19.90%		17.40%
Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of fair value investment							13.50%
Consolidated Uranium Inc. And Virginia Energy
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Change In Value Of Investments Accounted At Fair Value | $						4,980	$ (16,808)	$ 6,311
IsoEnergy Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Number of Common Stock Shares Acquired			406,650
Tate Transition Metals Ltd
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Percentage of fair value investment		19.90%
Subscription Agreement, Shares Issued		199,000
Subscription Agreement, Purchase Price | $		$ 1,990
IsoEnergy Ltd. | Private Placement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Number of shares issued (in shares)			8,134,500
Sale of stock, price per share (in USD per share) | $ / shares			$ 4.50
Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Shares Converted				16,189,548
Virginia Uranium, 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				0.26
Business Combination, Number of Common Stock Shares Acquired				9,439,857
Business Combination, Acquired Shares Converted To Common Stock				2,454,362
Virginia Uranium, Inc. | IsoEnergy Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable, Entity Shares Issued Per Acquiree Share	0.500
IsoEnergy Ltd.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total purchase price | $			$ 1,830
CUR
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	5.00%			16.70%
Level 1 | Consolidated Uranium Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value | $						23,630	16,500
Level 1 | Virginia Uranium, Inc.
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments accounted for at fair value | $						$ 3,390	$ 2,830