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Basis of Presentation - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 14,779 | $ 17,533
Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 13,897 | 17,079
Water Resources and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 882 | 454
Early and Mid-Season | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 11,645 | 15,417
Fresh Fruit | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 1,906 | 1,088
Land and other leasing | Water Resources and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 734 | 247
Other | Alico Citrus |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | 346 | 574
Other | Water Resources and Other Operations |  |
Disaggregation of Revenue [Line Items] |  |
Total Revenues | $ 148 | $ 207

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8933-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 + Details
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