Inventories - Components (Details) - USD ($) $ in Thousands  | 
Mar. 31, 2021  | 
Sep. 30, 2020  | 
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Unharvested fruit crop on the trees | $ 29,253 | $ 40,265 | 
| Other | 782 | 590 | 
| Total inventories | $ 30,035 | $ 40,855 | 
| X | ||||||||||
- Definition Carrying amount as of the balance sheet date of agricultural goods that are not yet mature and thus have not yet been harvested. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- References No definition available. 
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
- Definition Amount before valuation and LIFO reserves of other inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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