Mineral properties and development costs - Mineral property expenses (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
May 31, 2019 |
May 31, 2020 |
May 31, 2019 |
|
| Mineral property expense | $ 2,906 | $ 1,545 | $ 4,441 |
| Alaska, USA [Member] | |||
| Community | 146 | 137 | 264 |
| Drilling | 173 | 173 | |
| Engineering | 303 | 723 | 624 |
| Environmental | 136 | 99 | 271 |
| Geochemistry and geophysics | 593 | 12 | 758 |
| Land and permitting | 174 | 134 | 360 |
| Project support | 778 | 249 | 1,004 |
| Other income | (1) | ||
| Wages and benefits | 603 | 191 | 988 |
| Mineral property expense | $ 2,906 | $ 1,545 | $ 4,441 |