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Summary of Significant Accounting Policies - Disaggregation of revenue (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | $ 46,643 | $ 39,846
Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 45,059 | 38,145
Land Management and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 1,584 | 1,701
Early and Mid-Season | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 14,534 | 11,954
Valencias | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 26,925 | 23,906
Fresh Fruit and Other | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 774 | 1,051
Grove Management Services | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 2,826 | 1,234
Land and Other Leasing | Land Management and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | 1,284 | 1,327
Other | Land Management and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Revenue from contract with customer, excluding assessed tax | $ 300 | $ 374

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