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Income Taxes - Components of loss before income taxes (Details) - USD ($)
$ in Thousands
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            
Domestic         $ (51,795) $ (56,586)
Foreign         558 144
Total $ (15,353) $ (15,012) $ (29,275) $ (30,892) $ (51,236) $ (56,441)