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Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2024
Income Taxes [Abstract] |
Summary of income tax recovery | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
(in thousands) |  | 2024 |  | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax: |  | ​ |  |  | ​ |
Origination of temporary differences | ​ | $ | 211 | ​ | $ | 2,578
Prior year over (under) provision | ​ |  | 25 | ​ |  | (235)
Income tax recovery | ​ | $ | 236 | ​ | $ | 2,343
Summary of reconciliation of the effective rate of income tax | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​
(in thousands) |  | 2024 |  | 2023 |
​ | ​ | ​ | ​ | ​ | ​ | ​ |
(Loss) Income before taxes – continuing operations | ​ | $ | (91,826) | ​ | $ | 87,021 | ​
Combined Canadian tax rate | ​ |  | 26.50 | % |  | 26.50 | %
Income tax recovery (expense) at combined rate | ​ |  | 24,334 | ​ |  | (23,061) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Difference in tax rates | ​ |  | 12,224 | ​ |  | (6,536) | ​
Non-deductible amounts | ​ |  | (12,864) | ​ |  | (5,042) | ​
Non-taxable amounts | ​ |  | 2,294 | ​ |  | 33,314 | ​
Change in deferred tax assets not recognized | ​ |  | (25,485) | ​ |  | 3,925 | ​
Change in tax rates, legislation | ​ |  | (112) | ​ |  | (80) | ​
Prior year under provision | ​ |  | 25 | ​ |  | (235) | ​
Other | ​ |  | (180) | ​ |  | 58 | ​
Income tax recovery | ​ | $ | 236 | ​ | $ | 2,343 | ​
​
Summary of deferred income tax assets (liabilities) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ |  | At December 31 |  | At December 31
(in thousands) | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax assets: |  | ​ |  |  | ​ |
Property, plant and equipment, net | ​ | $ | 387 | ​ | $ | 387
Post-employment benefits | ​ |  | 268 | ​ |  | 295
Reclamation obligations | ​ |  | 11,080 | ​ |  | 11,699
Non-capital tax loss carry forwards | ​ |  | 13,806 | ​ |  | 18,489
Capital loss carry forward | ​ |  | 17,738 | ​ |  | 25,088
Other | ​ |  | 10,155 | ​ |  | 9,348
Deferred income tax assets-gross | ​ |  | 53,434 | ​ |  | 65,306
Set-off against deferred income tax liabilities | ​ |  | (53,434) | ​ |  | (65,306)
Deferred income tax assets-per balance sheet | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax liabilities: | ​ |  |  | ​ |  |
Inventory | ​ | $ | (850) | ​ | $ | (852)
Property, plant and equipment, net | ​ |  | (35,872) | ​ |  | (40,707)
Investments-equity instruments and uranium | ​ |  | (17,738) | ​ |  | (25,088)
Other | ​ |  | (1,345) | ​ |  | (1,266)
Deferred income tax liabilities-gross | ​ |  | (55,805) | ​ |  | (67,913)
Set-off of deferred income tax assets | ​ |  | 53,434 | ​ |  | 65,306
Deferred income tax liabilities-per balance sheet | ​ | $ | (2,371) | ​ | $ | (2,607)
Summary of deferred income tax liability continuity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
(in thousands) |  | 2024 |  | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Balance-January 1 | ​ | $ | (2,607) | ​ | $ | (4,950)
Recognized in income | ​ |  | 236 | ​ |  | 2,343
Balance-December 31 | ​ | $ | (2,371) | ​ | $ | (2,607)
Summary of deferred income tax assets not recognized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​
​ |  | At December 31 |  | At December 31
(in thousands) | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Deferred income tax assets not recognized |  | ​ |  |  | ​ |
Property, plant and equipment | ​ | $ | 9,323 | ​ | $ | 6,985
Tax losses-capital | ​ |  | 44,381 | ​ |  | 38,445
Tax losses-operating | ​ |  | 86,494 | ​ |  | 69,919
Tax credits | ​ |  | 2,500 | ​ |  | 1,126
Other deductible temporary differences | ​ |  | 1,127 | ​ |  | 2,881
Deferred income tax assets not recognized | ​ | $ | 143,825 | ​ | $ | 119,356
Summary of Canadian tax losses and tax credits not recognized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Expiry |  | At December 31 |  | At December 31
(in thousands) | ​ | Date | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax losses-gross |  | ​ | 2025-2044 | ​ | $ | 370,207 | ​ | $ | 324,965
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax benefit at tax rate of 26% - 27% | ​ | ​ | ​ | ​ |  | 100,300 | ​ |  | 88,408
Set-off against deferred tax liabilities |  | ​ | ​ | ​ |  | (13,805) | ​ |  | (18,489)
Total tax loss assets not recognized | ​ | ​ | ​ | ​ | $ | 86,495 | ​ | $ | 69,919
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Tax credits | ​ |  | 2025-2036 | ​ |  | 1,127 | ​ |  | 1,126
Total tax credit assets not recognized | ​ | ​ | ​ | ​ | $ | 1,127 | ​ | $ | 1,126
​

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