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Related party transactions - FreshRealm (Details) $ in Thousands, $ in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
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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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