XML 51 R35.htm IDEA: XBRL DOCUMENT v3.20.2
Basic and Diluted (Loss) Earnings Per Share - Additional Information (Detail) - shares
shares in Millions
3 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Restricted Stock    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive securities excluded from computation of diluted (loss) earnings per share, shares 1.7 0.7