Income taxes (Details) - USD ($) |
Nov. 30, 2021 |
Nov. 30, 2020 |
Nov. 30, 2019 |
|---|---|---|---|
| Income Taxes | |||
| Non-capital loss carry-forwards | $ 16,323,553 | $ 14,690,358 | |
| Book and tax basis differences on assets and liabilities | 1,527,791 | 1,274,734 | |
| Other | 1,509,122 | 1,263,175 | |
| Investment tax credit | 2,850,496 | 3,405,090 | |
| Undeducted research and development expenditures | 4,227,211 | 4,990,176 | |
| Capital loss carryforwards | 318,915 | 318,915 | |
| Share issuance cost | 227,253 | 492,243 | |
| Deferred tax assets, gross | 26,984,341 | 26,434,691 | |
| Unrealized foreign exchange gain | 271,913 | 271,913 | |
| Convertible debentures | 12,857 | 4,132 | |
| Deferred tax liabilities | 284,770 | 276,045 | |
| Valuation allowances for deferred tax assets | 26,699,571 | 26,158,646 | |
| Net deferred tax assets | $ 0 | $ 0 | $ 0 |