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Description of Business and Basis of Presentation - (Details) | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 USD ($) a property segment | Dec. 31, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Property Plant And Equipment [Line Items] |  |  |  |
Number of business segments | segment | 2 |  |  |
Revenue, description of timing | Receivables under contracts, whereby pricing is based on contractual and market prices, are primarily paid at the floor amount and are collected within seven days after the harvest week. Any adjustments to pricing as a result of changes in market prices are collected or paid thirty to sixty days after final market pricing is published. |  |  |
Accounts receivable, net | $ 8,901,000 |  | $ 6,105,000 |
Net Income (loss) attributable to subsidiary | (51,000) | $ (41,000) |  |
Citree |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Ownership interest (as a percent) |  | 51.00% |  |
Citree |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Net Income (loss) attributable to subsidiary | (103,775) | $ 82,500 |  |
Citrus |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Accounts receivable, net | $ 5,510,000 |  |  | $ 3,161,000
Land |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Area of land owned (in acres) | a | 81,000 |  |  |
Number of primary classifications | property | 2 |  |  |
Mineral Rights |  |  |  |
Property Plant And Equipment [Line Items] |  |  |  |
Area of land owned (in acres) | a | 90,000 |  |  |

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