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Related party transactions - FreshRealm (Details) $ in Thousands, $ in Millions					1 Months Ended					3 Months Ended							12 Months Ended
	May 15, 2020 USD ($)	Apr. 01, 2020 USD ($) item	Feb. 03, 2020	Jul. 31, 2018 USD ($)	Oct. 31, 2020 USD ($)	Apr. 30, 2020 USD ($)	Oct. 31, 2019 USD ($) director	Apr. 30, 2019 USD ($) item	Jan. 31, 2018 USD ($) director	Jul. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)	Jul. 31, 2019 USD ($)	Apr. 30, 2019 USD ($)	Jan. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)	Apr. 30, 2018 USD ($) director	Oct. 31, 2020 USD ($) director item	Oct. 31, 2020 MXN ($) director item	Oct. 31, 2019 USD ($)	Oct. 31, 2018 USD ($)	Oct. 31, 2020 MXN ($)	Mar. 31, 2020	Nov. 25, 2019 USD ($)
Related party
Investments in unconsolidated entities					$ 6,065		$ 10,722				$ 10,722						$ 6,065		$ 10,722
Amount loaned																			23,800	$ 11,500
Notes receivable from FreshRealm							35,241				35,241								35,241
Notes receivable from FreshRealm converted to investment in FreshRealm																	2,761
Accounts receivable					63,668		63,423				63,423						$ 63,668		63,423
Number of officers | item																	1	1
Number of board of directors | director																	5	5
Former Chairman and Chief Executive Officer
Related party
Payment to acquire unconsolidated entities							500
FreshRealm
Related party
Investments in unconsolidated entities							5,800				5,800								5,800
Impair investment in FreshRealm										$ 2,800								$ 2.8
VIE ownership (as a percent)		37.00%	37.00%														37.00%	37.00%
Amount loaned											3,700	$ 5,400	$ 4,200
Notes receivable from FreshRealm					34,500		35,200				35,200						$ 34,500		35,200
Note receivable, excluding accrued interest					32,800												32,800
Convertible note receivable																							$ 2,700
Loan receivable fixed interest rate (as a percent)		3.00%																				10.00%	10.00%
Notes receivable from FreshRealm converted to investment in FreshRealm		$ 1,000
Subscription agreements issued by investment	$ 4,000	4,000
Payment to acquire unconsolidated entities		$ 500
Number of extension option | item		2
Extension period		1 year
Loan write-off										34,200							34,200	$ 34.2
Interest receivable										4,100											$ 4.1
Accounts receivable					716		1,493			300	$ 1,493						716		1,493		$ 0.3
Total impairment										37,300								37.3
Discreet tax benefit										$ (9,500)								$ (9.5)
Revenue from related parties																	400		200	300
FreshRealm | Non Executive Directors
Related party
Payment to acquire unconsolidated entities						$ 100	$ 200	$ 400	$ 1,800							$ 1,200
Number of officers | item								2
Number of board of directors | director							1		1							2
FreshRealm | RFG
Related party
Revenue from related parties																	$ 300		$ 2,000	$ 9,900
FreshRealm | NMUPA
Related party
Loan receivable commitment				$ 12,000
Amount loaned														$ 3,000	$ 9,000
FreshRealm | $7.5 million Note
Related party
Amount loaned														$ 7,500
Don Memo
Related party
Amount loaned					$ 700
Loan receivable fixed interest rate (as a percent)					7.25%												7.25%				7.25%

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