Mineral Properties and development costs (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended | |
|---|---|---|---|
May 31, 2020 |
Nov. 30, 2019 |
Nov. 30, 2018 |
|
| Mineral properties and development costs | $ 30,631 | ||
| Alaska, USA [Member] | |||
| Reimbursable Acquisition Costs | $ (44) | ||
| Acquisition costs | 44 | ||
| Mineral properties and development costs | 30,631 | $ 30,587 | |
| Assets derecognized | (30,587) | ||
| Ambler Properties [Member] | Alaska, USA [Member] | |||
| Reimbursable Acquisition Costs | (44) | ||
| Acquisition costs | 44 | ||
| Mineral properties and development costs | 26,631 | 26,587 | |
| Assets derecognized | (26,587) | ||
| Bornite Properties [Member] | Alaska, USA [Member] | |||
| Mineral properties and development costs | $ 4,000 | $ 4,000 | |
| Assets derecognized | $ (4,000) |