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RELATED PARTY TRANSACTIONS - Expense, Accounts Payable and Accounts Receivable (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Jan. 07, 2026	Dec. 31, 2025
Related Party Transactions
Total expenses	$ 918	$ 101	$ 1,675	$ 162
Related party outstanding accounts payable	360		360			$ 214
Term debt	15,658		15,658
Loan origination fee	(3,218)		(3,218)
Other receivables	3,003		3,003			9,221
Total receivables from McEwen Copper Inc.	15,443		15,443			9,221
Less: current receivables	3,003		3,003			3,169
Non-current receivables from McEwen Copper Inc.	12,440		12,440			6,052
REVlaw
Related Party Transactions
Total expenses	101	$ 101	206	$ 162
Related party outstanding accounts payable						46
Inventus Mining Corp.
Related Party Transactions
Related party outstanding accounts payable	205		205		$ 200
Paragon Advanced Labs Inc.
Related Party Transactions
Total expenses	817		1,469
Related party outstanding accounts payable	$ 155		$ 155			$ 168

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