| Schedule of Research and development expenses |
| | February 28, 2023 | | | February 28, 2022 | | Machinery and equipment expenditures | | $ | 4,216,042 | | | $ | 9,549,802 | | Employee compensation | | | 7,805,369 | | | | 7,259,640 | | External engineering | | | 3,272,864 | | | | 7,307,363 | | Plant and laboratory operating expenses | | | 2,580,977 | | | | 2,649,133 | | Tax credits | | | (1,199,137 | ) | | | (91,960 | ) | Other | | | 669,849 | | | | 1,062,447 | | | | $ | 17,345,964 | | | $ | 27,736,425 | |
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