CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net loss	$ (43,691)	$ 33,177	$ (86,094)
Adjustments to reconcile net loss from operating activities:
Loss from investment in McEwen Copper Inc. (Note 9)	46,977	57,821
Income from investment in Minera Santa Cruz S.A. (Note 9)	(9,021)	(62)	(2,776)
Depreciation, amortization and depletion	30,863	30,359	19,532
Unrealized (gain) loss on marketable securities (Note 5)	(286)	(20,542)	511
Foreign exchange loss on marketable securities		9,858
Foreign exchange loss	656	48,977	2,029
Reclamation accretion and adjustments to estimate	864	2,693	7,168
Income and mining tax (recovery) expense	(6,976)	37,018	(1,856)
Stock-based compensation	3,244	971	340
Dilution gain from investments in McEwen Copper Inc. (Note 9)	(5,777)
Gain on deconsolidation of McEwen Copper Inc. (Note 9)		(222,157)
Other	349
Change in non-cash working capital items:
Change in accounts receivable and other	2,356	6,548	(12,873)
Change in accounts payable and other liabilities	9,896	(24,298)	17,439
Cash provided by (used in) operating activities	29,454	(39,637)	(56,580)
Cash flows from investing activities:
Additions to mineral property interests and plant and equipment	(43,095)	(26,099)	(24,187)
Investment in McEwen Copper Inc. (Note 9)	(14,000)
Notes receivable acquired	(1,880)
Cash and restricted cash received from acquisition of Timberline Resources Corporation (Note 20)	1,131
Investment in marketable securities (Note 5)	(366)	(34,157)
Proceeds from sale of investment in McEwen Copper Inc.		6,032
Cash outflow on McEwen Copper Inc. deconsolidation		(45,708)
Other	164	295	286
Cash used in investing activities	(58,046)	(99,637)	(23,901)
Cash flows from financing activities:
Issuance of flow-through common shares, net of issuance costs (Note 13)	20,424	13,428	14,376
Proceeds from exercise of warrants	9		4
Proceeds from McEwen Copper Inc. financing		185,390	41,263
Proceeds from promissory note			15,000
Subscription proceeds received in advance			(2,850)
Principal repayment on long-term debt (Note 11)		(25,000)
Payment of finance lease obligations	(1,231)	(1,636)	(2,338)
Cash provided by financing activities	19,202	172,182	65,455
Effect of exchange rate change on cash and cash equivalents	(656)	(48,977)	(2,029)
Decrease in cash, cash equivalents and restricted cash	(10,046)	(16,069)	(17,055)
Cash, cash equivalents and restricted cash, beginning of year	27,510	43,579	60,634
Cash, cash equivalents and restricted cash, end of year	17,464	27,510	43,579
Supplemental disclosure of cash flow information:
Interest paid	(3,911)	(4,728)	(4,875)
Interest received	636	34,680	650
Taxes paid	$ (712)	$ (1,409)	$ (24)