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Related Party Transactions - Narrative (Details) - CAD ($) |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2023 | Oct. 30, 2023 | Oct. 31, 2024 | Oct. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Percentage of interests to be held to nominate one director |  |  |  |  | 5.00% |  |
Funding percentage rate |  |  |  |  | 100.00% | 100.00% | 100.00%
Waterbury Lake Uranium LP |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 70.32% | 69.35% |
Voting interest percentage |  |  |  |  | 75.00% |  |
Mineral property assets |  |  |  |  | $ 763,000 | $ 1,456,000 |
Denison Waterbury Corp |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest | 69.35% | 67.41% | 70.32% | 69.35% | 60.00% |  |
KWULP |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 40.00% |  |
KWULP Limited Partner |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 29.66% |  |
WLUC |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 0.02% |  |
WLULP Limited Partner |  |  |  |  |  |  |
Disclosure of transactions between related parties [line items] |  |  |  |  |  |  |
Ownership interest |  |  |  |  | 70.32% |  |

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