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EQUITY METHOD INVESTMENTS (Details) - USD ($) $ / shares in Units, $ in Thousands			6 Months Ended	12 Months Ended
	Dec. 15, 2025	Dec. 09, 2025	Jun. 30, 2026	Dec. 31, 2025	Dec. 14, 2025
McEwen Copper Inc.
EQUITY METHOD INVESTMENTS
Subsidiary ownership interest (as a percent)			46.30%
Difference in proportionate share of net assets			$ 199,100
Dilution gain (loss)				$ 789
Minera Santa Cruz S.A.
EQUITY METHOD INVESTMENTS
Subsidiary ownership interest (as a percent)			49.00%
Difference in proportionate share of net assets			$ 28,800
Paragon Advanced Labs Inc.
EQUITY METHOD INVESTMENTS
Subsidiary ownership interest (as a percent)	27.00%	27.30%	26.90%		27.30%
Number of shares acquired		8,742,880
Number of shares exchanged		709,992
Fair value of transaction		$ 13,700
Closing share price		$ 19.35
Difference in proportionate share of net assets			$ 12,500
Dilution gain (loss)	$ 200		$ (170)
Paragon Advanced Labs Inc. | Shareholder
EQUITY METHOD INVESTMENTS
Number of warrants exercised	400,000

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The dilution gain (loss) associated with the equity method investment., reduction in the investor's carrying amount of an equity method investment resulting from a decrease in its ownership percentage, when the investee issues additional equity and the investor does not maintain its proportional interest.

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