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Basic and Diluted Net Income (Loss) per Share - Narrative (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Jul. 31, 2020
Jul. 31, 2019
Jul. 31, 2020
Jul. 31, 2019
Restricted Shares        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of earnings per share (in shares) 225 149 187 135