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Property, Plant And Equipment - Narrative (Details) - CAD ($) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2024 | Dec. 31, 2023
Property Plant And Equipments [Line Items] |  |  |
Percentage of mineral property assets |  | 90.80% |
Carrying value of exploration properties acquired |  | $ (238,000) |
Proceeds on disposal of property, plant and equipment |  | 240,000 | $ 125,000
Mineral properties |  |  |
Property Plant And Equipments [Line Items] |  |  |
Carrying value of exploration properties acquired |  | $ (238,000) |
Kindersley Lithium Project |  |  |
Property Plant And Equipments [Line Items] |  |  |
Percentage of ownership interest earned through earn - in options |  | 75.00% |
Payments for acquisition of interest in project |  | $ 800,000 |
Transaction expenses related to agreement |  | 61,000 |
Expenses related to the earn - in option |  | $ 2,396,000 |
Foremost Clean Energy Ltd | Non-core uranium exploration properties |  |  |
Property Plant And Equipments [Line Items] |  |  |
Percentage of interest in exploration properties | 20.00% | 20.00% |
Foremost Clean Energy Ltd | Hatchet Lake |  |  |
Property Plant And Equipments [Line Items] |  |  |
Percentage of interest in exploration properties |  | 14.03% |
Foremost Clean Energy Ltd | Mineral properties |  |  |
Property Plant And Equipments [Line Items] |  |  |
Carrying value of exploration properties acquired |  | $ (238,000) |
Wheeler River Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership Interest, in Key Contractual Arrangements |  | 90.00% |
Waterbury Lake Uranium LP |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership interest, Joint Operations |  | 70.32% | 69.35%
Net smelter return royalty |  | 2.00% |
Midwest Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership Interest, in Key Contractual Arrangements |  | 25.17% | 25.17%
Mann Lake Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership Interest, in Key Contractual Arrangements |  | 30.00% | 30.00%
Wolly Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership Interest, in Key Contractual Arrangements |  | 20.77% | 20.77%
Johnston Lake Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership interest, contractual arrangements |  | 100.00% |
McClean Lake Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership Interest, in Key Contractual Arrangements |  | 22.50% | 22.50%
Building and Machinery |  | $ 51,545,000 |
Percentage of building and machinery |  | 69.90% |
JCU |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership interest, Joint Operations |  | 50.00% | 50.00%
JCU | Wheeler River Joint Venture |  |  |
Property Plant And Equipments [Line Items] |  |  |
Ownership interest, Joint Operations |  | 5.00% |
Saskatchewan |  |  |
Property Plant And Equipments [Line Items] |  |  |
Carrying value of mineral property assets |  | $ 167,297,000 |
Percentage of mineral property assets |  | 90.80% |

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