Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Revenue Recognition (Details)

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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