| Accounts payable and accrued liabilities |
| | November 30, 2021 | | | February 28, 2021 | | Trade accounts payable | | $ | 2,513,404 | | | $ | 5,082,736 | | Accrued construction costs | | | 902,325 | | | | - | | Accrued employee compensation | | | 1,187,977 | | | | 970,154 | | Accrued engineering fees | | | 312,155 | | | | 535,359 | | Accrued professional fees | | | 288,966 | | | | 1,270,628 | | Other accrued liabilities | | | 217,559 | | | | 265,988 | | | | $ | 5,422,386 | | | $ | 8,124,865 | |
|