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Earnings (Loss) Per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Nov. 30, 2020
Nov. 30, 2019
Nov. 30, 2020
Nov. 30, 2019
Earnings Per Share [Abstract]        
Shares excluded from computation of diluted earnings per share 1,030,835 405,433 492,011 391,563