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Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |
Accounts receivable, net | $ 713 | $ 2,544 |
Total Revenues | 122,251 | 81,281 | $ 129,829
Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 119,031 | 78,121 | 123,441
Water Resources and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 3,220 | 3,160 | 6,388
Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Accounts receivable, net | 160 | 1,912 |
Early and Mid-Season | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 39,574 | 24,309 | 45,999
Valencias | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 73,480 | 48,865 | 67,146
Fresh Fruit | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 3,629 | 2,054 | 5,735
Other | Alico Citrus |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,348 | 2,893 | 4,561
Other | Water Resources and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 433 | 508 | 362
Land and other leasing | Water Resources and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | 2,787 | 2,595 | 2,294
Sale of calves and culls | Water Resources and Other Operations |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Total Revenues | $ 0 | $ 57 | $ 3,732

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