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Income Taxes - Income tax reconciliation (Details) - USD ($)
12 Months Ended
Feb. 28, 2021
Feb. 29, 2020
Income tax (benefit) reconciliation:    
Expected federal income tax $ 283,052 $ 254,898
State tax, net of federal 27,102 19,758
Research and development tax credits (105,320) (213,521)
Permanent differences 12,719 29,632
Other adjustments 9,672 15,238
Income tax expense $ 227,225 $ 106,005