Plant and equipment (Details) - USD ($) $ in Thousands |
May 31, 2020 |
Nov. 30, 2019 |
|---|---|---|
| Cost | $ 4,450 | $ 4,250 |
| Accumulated amortization | (3,593) | (3,535) |
| Assets derecognized | (618) | |
| Net | 239 | 715 |
| Furniture and equipment [Member] | British Columbia, Canada [Member] | ||
| Cost | 63 | 63 |
| Accumulated amortization | (36) | (29) |
| Net | 27 | 34 |
| Leasehold improvements [Member] | British Columbia, Canada [Member] | ||
| Cost | 253 | 53 |
| Accumulated amortization | (43) | (17) |
| Net | 210 | 36 |
| Machinery and equipment[Member] | Alaska, USA [Member] | ||
| Cost | 3,667 | 3,667 |
| Accumulated amortization | (3,049) | (3,026) |
| Assets derecognized | (618) | |
| Net | 641 | |
| Vehicles [Member] | Alaska, USA [Member] | ||
| Cost | 348 | 348 |
| Accumulated amortization | (348) | (348) |
| Computer hardware and software [Member] | British Columbia, Canada [Member] | ||
| Cost | 115 | 115 |
| Accumulated amortization | (113) | (112) |
| Net | 2 | 3 |
| Computer hardware and software [Member] | Alaska, USA [Member] | ||
| Cost | 4 | 4 |
| Accumulated amortization | $ (4) | (3) |
| Net | $ 1 |