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Research and Development - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Aug. 31, 2020
Aug. 31, 2019
Research And Development [Abstract]        
Research and Development Expense $ 1,666 $ 1,899 $ 3,521 $ 3,762