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Reserve for FreshRealm Note Receivable and Impairment of Investment (Detail) $ in Thousands, $ in Millions	3 Months Ended	12 Months Ended
	Jul. 31, 2020 USD ($)	Oct. 31, 2020 USD ($)	Oct. 31, 2020 MXN ($)	Oct. 31, 2020 MXN ($)	Oct. 31, 2019 USD ($)
Equity investment
Accounts receivable		$ 63,668			$ 63,423
FreshRealm
Equity investment
Impair investment in FreshRealm	$ 2,800		$ 2.8
Loan write-off	34,200	34,200	34.2
Interest receivable	4,100			$ 4.1
Accounts receivable	300	$ 716		$ 0.3	$ 1,493
Total impairment	37,300		37.3
Discreet tax benefit	$ (9,500)		$ (9.5)