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Income Taxes - Income tax reconciliation (Details) - USD ($) | 12 Months Ended
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Feb. 29, 2020 | Feb. 28, 2019
Income tax (benefit) reconciliation: |  |
Expected federal income tax | $ 254,898 | $ 38,101
State tax, net of federal | 19,758 | 11,430
Research and development tax credits | (213,521) | (19,588)
Permanent timing difference | 29,632 | 2,272
Change in valuation allowances | 15,238 | (36,425)
Other adjustments |  | 24,057
Income tax expense (benefit) | $ 106,005 | $ 19,847

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