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Capital Management and Financial Risk (Tables) | 12 Months Ended
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Dec. 31, 2024
Capital Management And Financial Risk [Line Item] |
Capital management | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | At December 31 |  | At December 31
(in thousands) | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Net cash and investments: |  | ​ |  |  | ​ |
Cash and cash equivalents | ​ | $ | 108,518 | ​ | $ | 131,054
Equity instrument investments | ​ |  | 8,047 | ​ |  | 10,517
Investments-uranium | ​ |  | 231,088 | ​ |  | 276,815
Investments-convertible debentures | ​ | ​ | 13,000 | ​ | ​ | 15,565
Debt obligations-current | ​ |  | (375) | ​ |  | (213)
Net cash and investments | ​ | $ | 360,278 | ​ | $ | 433,738
Credit risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | At December 31 |  | At December 31
(in thousands) | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Cash and cash equivalents |  | $ | 108,518 |  | $ | 131,054
Trade and other receivables |  |  | 3,075 |  |  | 1,913
Restricted cash and investments |  |  | 11,624 |  |  | 11,231
Investments-convertible debentures | ​ | ​ | 13,000 | ​ | ​ | 15,565
​ |  | $ | 136,217 |  | $ | 159,763
Maturities of financial liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Within 1 |  | 1 to 5 |  | More than
(in thousands) | ​ | Year | ​ | Years | ​ | 5 years
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accounts payable and accrued liabilities (note 9) |  | $ | 21,333 |  | ​ | — | ​ | ​ | —
Debt obligations (note 12) |  |  | 438 |  |  | 1,567 | ​ | ​ | 1,343
​ |  | $ | 21,771 |  | ​ | 1,567 | ​ | ​ | 1,343
Currency risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Dec. 31'2024 |  | Sensitivity |  | ​ | ​
​ | ​ | Foreign | ​ | Foreign | ​ | Change in
​ | ​ | Exchange | ​ | Exchange | ​ | net income
(in thousands except foreign exchange rates) | ​ | Rate | ​ | Rate | ​ | (loss)
​ |  |  |  |  |  | ​ |
Currency risk | ​ | ​ | ​ | ​ | ​ | ​ | ​
CAD weakens |  | 1.4389 |  | 1.5828 | ​ | $ | 25,762
CAD strengthens |  | 1.4389 |  | 1.2950 | ​ | $ | (25,762)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Price risk | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Absolute change |  | At December 31,2024 |  | 10% increase |  | 10% decrease
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Equity price of F3 |  | $ | 0.26 | ​ | 0.28 | ​ | 0.23
Convertible debentures fair value (in thousands) | ​ | $ | 13,000 | ​ | 13,300 | ​ | 12,600
Fair value of financial assets and financial liabilities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Financial |  | Fair |  | December 31, |  | December 31,
​ | ​ | Instrument | ​ | Value | ​ | 2024 | ​ | 2023
(in thousands) | ​ | Category(1) | ​ | Hierarchy | ​ | Fair Value | ​ | Fair Value
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial Assets: |  |  |  |  |  |  |  |  |  |
Cash and equivalents |  | Category B |  |  |  | $ | 108,518 |  | $ | 131,054
Trade and other receivables |  | Category B |  |  |  |  | 3,075 |  |  | 1,913
Investments |  |  |  |  |  |  |  |  |  |
Equity instruments-shares |  | Category A |  | Level 1 |  |  | 7,767 |  |  | 10,390
Equity instruments-warrants |  | Category A |  | Level 2 |  |  | 280 |  |  | 127
Convertible Debentures | ​ | Category A | ​ | Level 3 | ​ | ​ | 13,000 | ​ | ​ | 15,565
Restricted cash and equivalents |  |  |  |  |  |  |  |  |  |
Elliot Lake reclamation trust fund |  | Category B |  |  |  |  | 3,652 |  |  | 3,259
Credit facility pledged assets |  | Category B |  |  |  |  | 7,972 |  |  | 7,972
​ | ​ | ​ | ​ | ​ |  | $ | 144,264 |  | $ | 170,280
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial Liabilities: |  |  |  |  | ​ |  |  | ​ |  |
Account payable and accrued liabilities |  | Category C |  |  | ​ |  | 21,333 | ​ |  | 10,822
Debt obligations |  | Category C |  |  | ​ |  | 2,414 | ​ |  | 417
​ | ​ | ​ | ​ | ​ |  | $ | 23,747 |  | $ | 11,239
| (1) | Financial instrument designations are as follows: Category A=Financial assets and liabilities at fair value through profit and loss; Category B=Financial assets at amortized cost; and Category C=Financial liabilities at amortized cost.
Interest rate risk |
Capital Management And Financial Risk [Line Item] |
Sensitivity analysis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Absolute change |  | Base |  | 1% increase |  | 1% decrease |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Credit spread |  | ​ | 19 | % | 20 | % | 18 | %
Convertible debentures fair value (in thousands) | ​ | $ | 13,000 |  | 12,800 |  | 13,300 | ​

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