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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
OPERATING ACTIVITIES      
Net Income (Loss) $ (47,841) $ 99,756 $ (59,944)
Items not involving cash:      
Depreciation, Depletion and Amortization 3,127 2,751 3,269
Share-Based Payment Arrangement, Noncash Expense 5,414 4,625 4,641
Gain On Disposal Of Non-Core Assets (74) (119,257) (366)
Income (Loss) from Equity Method Investments 175 0 0
Debt Securities, FV-NI, Gain (Loss) 0 (1,430) 0
Accretion of asset retirement obligations 2,068 1,192 1,556
Payments for Environmental Liabilities (3,206) 0 0
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax (223) (431) (2,080)
Unrealized Gain (Loss) on Investments 0 (15,472) 16,808
Realized Investment Gains (Losses) 0 10,491 0
Realized gain on maturities of marketable securities 2,310 1,141 0
Miscellaneous non-cash income (expenses) 71 84 (93)
Increase (Decrease) in Operating Capital [Abstract]      
Increase (Decrease) in Debt Securities, Trading, and Equity Securities, FV-NI 8,989 530 456
Increase (Decrease) in Inventories 13,038 (100) (8,571)
Increase (Decrease) in Accounts and Other Receivables (16,814) (237) 1,837
Increase (Decrease) in Prepaid Expense (3,130) 423 (8,886)
Increase (Decrease) in Accounts Payable and Accrued Liabilities (3,257) 2,807 1,671
Net Cash Provided by (Used in) Operating Activities, Total (43,973) (15,409) (49,702)
Net Cash Provided by (Used in) Investing Activities [Abstract]      
Payments to Acquire Property, Plant, and Equipment (22,174) (15,437) (1,996)
Purchase Of Mineral Properties (7,209) (29,273) 0
Payments to Acquire Intangible Assets (1,639) 0 0
Payments to Acquire Marketable Securities (237,450) (174,622) (11,435)
Proceeds from Sale and Maturity of Marketable Securities 282,960 79,041 0
Purchase Of Investments, Without A Readily Determinable Fair Value (11,029) (1,324) 0
Proceeds For Deposits For Assets Held-For-Sale 0 0 6,000
Disposal On Non-Core Assets, Investing Activities 74 56,875 366
Payment for Contingent Consideration Liability, Investing Activities (16,830) 0 0
Proceeds from Sale and Collection of Notes Receivable 0 60,887 0
Net Cash Provided by (Used in) Investing Activities, Total (13,297) (23,853) (7,065)
Net Cash Provided by (Used in) Financing Activities [Abstract]      
Proceeds From Issuance Of Common Stock And Warrants 16,619 31,813 7,886
Payment, Tax Withholding, Share-Based Payment Arrangement (837) (918) (884)
Proceeds from Stock Options Exercised 357 970 753
Payment, Tax Withholding, Share-Based Payment Arrangement, Due Upon Exercise Of Award (552) (1,533) (11)
Proceeds from Noncontrolling Interests 0 83 126
Net Cash Provided by (Used in) Financing Activities, Total 15,587 30,415 7,870
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations (1,742) 12 (66)
Cash Acquired from Acquisition 27,006 0 0
Restricted Cash And Cash Equivalents, Held-For-Sale 0 0 3,590
Release Of Restricted Cash 0 3,590 0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total (16,419) (5,245) (52,553)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance 75,024 80,269 132,822
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance 58,605 75,024 80,269
Non-cash investing and financing transactions:      
Income Taxes Paid, Net 1,885 0 0
Interest Paid, Including Capitalized Interest, Operating and Investing Activities 200 186 25
Increase (Decrease) In Capital Expenditures Incurred But Not Yet Paid 146 701 (161)
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Shares Issued 178,438 0 0
Noncash Or Part Noncash, Shares Issued For Joint Venture Interests 3,500 0 0
Noncash Or Part Noncash, Shares Issued For Acquisition Of Intangible Assets 1,500 0 0
Noncash Or Part Noncash, Contingent Consideration For Acquisition Of Intangible Assets 1,690 0 0
Stock Issued During Period, Value, Issued for Services 0 0 205
Noncash Acquisition Of Convertible Note $ 0 $ 59,457 $ 0