Segment Disclosure - Additional information (Detail)	12 Months Ended
	Oct. 31, 2021 Customer executiveOfficer Segment	Oct. 31, 2020 Customer	Oct. 31, 2019 Customer
Segment Reporting Information [Line Items]
Number of co-chief executive officers who act as chief operating decision makers | executiveOfficer	2
Number of reportable segments | Segment	2
Number of major customers | Customer	1	1	1
Customer Concentration Risk | Revenues | Customer One
Segment Reporting Information [Line Items]
Percentage of revenues contributed by major customers	10.60%	12.40%	12.80%