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Investment in Ambler Metals LLC - Narrative (Details) | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
May 31, 2022 USD ($) shares | May 31, 2021 USD ($) | May 31, 2022 USD ($) Owner shares | May 31, 2021 USD ($) | Feb. 28, 2022 USD ($) | Nov. 30, 2021 USD ($) | Feb. 11, 2020 USD ($)
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Joint venture, contributed amount |  |  |  |  | $ 51,000 |  |
Comprehensive loss | $ (4,074,000) | $ (3,413,000) | $ (9,097,000) | $ (7,929,000) |  |  |
Number of board members | Owner |  |  | 2 |  |  |  |
Ambler Metals LLC |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Joint venture, contributed amount | 51,000 |  | $ 51,000 |  |  |  |
Contribution made to joint venture | $ 51,000 |  | $ 51,000 |  |  |  |
Joint venture contribution made in common shares | shares | 31,469 |  | 31,469 |  |  |  |
Percentage of ownership | 50.00% |  | 50.00% |  |  |  | 50.00%
Comprehensive loss | $ (4,900,000) | $ (3,400,000) | $ (8,700,000) | (5,600,000) |  |  |
Number of board members | Owner |  |  | 4 |  |  |  |
Maximum exposure to loss | 155,700,000 |  | $ 155,700,000 |  |  |  |
Fair value ascribed to Ambler Metals LLC interest |  |  |  |  |  | $ 160,063,000 |
Loan repayments |  |  | 2,400,000 | 1,100,000 |  |  |
Loan repayments, Interest |  |  | 300,000 | $ 1,100,000 |  |  |
Loan repayments, principal |  |  | 2,100,000 |  |  |  |
South32 | Ambler Metals LLC |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Contribution made to joint venture | $ 51,000 |  | $ 51,000 |  |  |  |
Percentage of ownership |  |  |  |  |  |  | 50.00%
South32 |  |  |  |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |  |  |  |
Contribution made to joint venture |  |  |  |  |  |  | $ 145,000,000

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