CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents (Note 4)	$ 51,015	$ 13,692
Marketable securities (Note 5)	21,114	1,617
Receivables, prepaids and other current assets (Note 6)	5,752	7,486
Due from McEwen Copper Inc. (Note 15)	$ 3,169	$ 286
Other Receivable, after Allowance for Credit Loss, Current, Related Party [Extensible Enumeration]	Mcewen Copper Inc [Member]	Mcewen Copper Inc [Member]
Inventories (Note 7)	$ 26,836	$ 18,111
Total current assets	107,886	41,192
Mineral property interests and plant and equipment, net (Note 8)	227,208	210,922
Equity method investments (Note 9)	428,641	400,801
Due from McEwen Copper Inc. (Note 15)	$ 6,052
Other Receivable, after Allowance for Credit Loss, Noncurrent, Related Party [Extensible Enumeration]	Mcewen Copper Inc [Member]
Deferred tax assets (Note 19)	$ 25,591
Inventories (Note 7)	20,560	7,834
Restricted cash (Note 4)	4,246	3,772
Other assets	34	102
TOTAL ASSETS	820,218	664,623
Current liabilities:
Accounts payable and accrued liabilities	44,911	28,448
Reclamation and remediation liabilities (Note 12)	6,473	4,988
Contract liability (Note 17)	7,549	3,544
Flow-through share premium (Note 13)	974	5,447
Tax liabilities (Note 19)	2,976	4,478
Lease liabilities (Note 10)	926	788
Total current liabilities	63,809	47,693
Long-term debt, net of issuance costs (Note 11)	126,168	40,000
Reclamation and remediation liabilities (Note 12)	39,384	41,075
Deferred tax liabilities (Note 19)	40,328	36,630
Lease liabilities (Note 10)	1,088	1,323
Other liabilities	3,204	2,927
Total liabilities	273,981	169,648
Shareholders' equity:
Common shares: 55,517 as at December 31, 2025, and 53,054 as at December 31, 2024 issued and outstanding (in thousands) (Note 13)	1,821,530	1,804,702
Accumulated deficit	(1,275,293)	(1,309,727)
Total shareholders' equity	546,237	494,975
TOTAL LIABILITIES & SHAREHOLDERS' EQUITY	$ 820,218	$ 664,623