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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) | 12 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |
Accounts receivable, net | $ 6,105,000 | $ 4,347,000 |
Total Revenues | 108,564,000 | 92,507,000 | $ 122,251,000
Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 105,796,000 | 89,369,000 | 119,031,000
Land Management and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,768,000 | 3,138,000 | 3,220,000
Early and Mid-Season | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 31,525,000 | 31,303,000 | 39,574,000
Valencias | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 55,918,000 | 50,060,000 | 73,480,000
Fresh Fruit | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 608,000 | 2,321,000 | 3,629,000
Grove Management Services | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 16,983,000 | 4,599,000 | 1,342,000
Other | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 762,000 | 1,086,000 | 1,006,000
Other | Land Management and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 364,000 | 455,000 | 433,000
Land and other leasing | Land Management and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,404,000 | 2,683,000 | $ 2,787,000
Citrus trees |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Accounts receivable, net | $ 3,161,000 | $ 584,000 |

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