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Investments (Tables) | 12 Months Ended
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Dec. 31, 2024
Investments [Abstract] |
Summary of Investments balances | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | At December 31 |  | At December 31
(in thousands) | ​ | 2024 | ​ | 2023
​ | ​ | ​ | ​ | ​ | ​ | ​
Investments: |  | ​ |  |  | ​ |
Equity instruments |  | ​ |  |  | ​ |
Shares | ​ | $ | 6,280 | ​ | $ | 10,390
Warrants | ​ |  | 280 | ​ |  | 127
Investment in Associates | ​ | ​ | 1,487 | ​ | ​ | —
Convertible Debentures | ​ | ​ | 13,000 | ​ | ​ | 15,565
Physical Uranium | ​ |  | 231,088 | ​ |  | 276,815
​ | ​ | $ | 252,135 | ​ | $ | 302,897
​ | ​ | ​ | ​ | ​ | ​ | ​
Investments-by balance sheet presentation: | ​ |  |  | ​ |  |
Current | ​ | $ | 6,292 | ​ | $ | 10,400
Long-term | ​ |  | 245,843 | ​ |  | 292,497
​ | ​ | $ | 252,135 | ​ | $ | 302,897
Summary of Investments continuity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Equity |  | Investment in |  | Convertible | ​ | Physical |  | Total
(in thousands) | ​ | Instruments | ​ | Associates | ​ | Debentures | ​ | Uranium | ​ | Investments
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance-January 1, 2023 | ​ | $ | 8,109 | ​ | $ | — | ​ | $ | — | ​ | $ | 162,536 | ​ | $ | 170,645
Acquisition of investments | ​ |  | 2,417 | ​ |  | — | ​ |  | 15,000 | ​ |  | — | ​ |  | 17,417
Sale of investments | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (19,901) | ​ |  | (19,901)
Change in fair value gain to profit and (loss) (note 17) | ​ |  | (9) | ​ |  | — | ​ |  | 565 | ​ |  | 134,180 | ​ |  | 134,736
Balance-December 31, 2023 | ​ | $ | 10,517 | ​ | $ | — | ​ | $ | 15,565 | ​ | $ | 276,815 | ​ | $ | 302,897
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Sale of investments | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | (13,598) | ​ |  | (13,598)
Acquisition of investments | ​ | ​ | 977 | ​ | ​ | 1,487 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2,464
Change in fair value gain to profit and (loss) (note 17) | ​ |  | (4,934) | ​ |  | — | ​ |  | (2,565) | ​ |  | (32,129) | ​ |  | (39,628)
Balance-December 31, 2024 | ​ | $ | 6,560 | ​ | $ | 1,487 | ​ | $ | 13,000 | ​ | $ | 231,088 | ​ | $ | 252,135

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