Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
OPERATING ACTIVITIES
Net loss	$ (48,164)	$ (2,781)
Adjustments to reconcile net loss to net cash used in operating activities:
Depletion, depreciation and amortization	2,611	1,858
Share-based compensation	5,490	2,757
Accretion of asset retirement obligations	1,935	589
Settlement of asset retirement obligations	(14,187)	0
Unrealized foreign exchange loss	1,516	353
Equity in loss of unconsolidated affiliates	421	0
Realized gain on marketable securities	(450)	(861)
Gain on sale of assets	(3,490)	(2)
Other, net	415	(27)
Changes in current assets and liabilities:
Marketable securities	328	(985)
Inventories	(7,184)	10,788
Trade and other receivables	29,965	(8,754)
Prepaid expenses and other current assets	(203)	(1,442)
Accounts payable and accrued liabilities	(13,776)	(2,327)
Net cash used in operating activities	(44,773)	(834)
INVESTING ACTIVITIES
Additions to property, plant and equipment	(5,990)	(16,307)
Additions to mineral properties	(11,893)	(4,737)
Purchases of marketable securities	(138,945)	(145,017)
Maturities of marketable securities	84,995	133,253
Purchase of investments	(6,874)	(2,149)
Proceeds from sale of assets	3,490	2
Net cash used in investing activities	(75,217)	(34,955)
FINANCING ACTIVITIES
Issuance of common shares for cash, net of issuance costs	151,879	4,788
Proceeds from Noncontrolling Interests	759	0
Cash received from exercise of stock options	157	156
Net cash provided by financing activities	152,131	3,555
Effect of exchange rate fluctuations on cash held in foreign currencies	1,098	(272)
Net change in cash, cash equivalents and restricted cash	33,239	(32,506)
Cash, cash equivalents and restricted cash, beginning of period	58,605	75,024
CASH, CASH EQUIVALENTS AND RESTRICTED CASH, END OF PERIOD	91,844	42,518
Supplemental disclosure of cash flow information:
Cash paid for interest	108	96
Increase (decrease) in accrued capital expenditures and accounts payable for property, plant and equipment and mineral properties	2,710	(415)
Restricted Stock Units (RSUs)
FINANCING ACTIVITIES
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	(664)	(837)
Stock Appreciation Rights (SARs)
FINANCING ACTIVITIES
Cash paid to fund employee income tax withholding due upon vesting of restricted stock units	$ 0	$ (552)