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Income Taxes - Reconciliation of income tax expense at U.S. Federal statutory income tax rate (Details)
3 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Feb. 29, 2020
Feb. 28, 2019
Income Taxes            
Federal income tax expense at statutory tax rate 0.10% 0.10% 0.20% 0.10% 21.00% 21.00%
State income taxes, net of federal tax benefit         7.50% 6.00%
Stock based compensation         3.90% (2.10%)
Transaction costs         (0.20%) 0.00%
Changes in valuation allowances         (31.40%) (24.80%)
Other         (1.00%) (0.20%)
Effective Income Tax Rate         (0.20%) (0.10%)