Income taxes (Details Narrative) - USD ($) |
Nov. 30, 2021 |
Nov. 30, 2020 |
|---|---|---|
| Income Taxes | ||
| Operating loss carryforwards | $ 61,598,314 | |
| Research and experimental development expenditures, cumulative carry-forwards | 15,951,739 | $ 18,830,851 |
| Unclaimed investment tax credits | $ 2,933,013 | $ 3,508,087 |