Annual report pursuant to Section 13 and 15(d)

Description of Business and Basis of Presentation (Details)

v3.19.3
Description of Business and Basis of Presentation (Details)
a in Thousands
 3 Months Ended 12 Months Ended
Oct. 01, 2019
USD ($)
Oct. 01, 2018
USD ($)
Sep. 30, 2019
USD ($)
a
classification
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Sep. 30, 2019
USD ($)
a
classification
segment
Sep. 30, 2018
USD ($)
Sep. 30, 2017
USD ($)
Property, Plant and Equipment [Line Items]                          
Number of business segments | segment                     2    
Net loss attributable to subsidiary     $ (232,000) $ (28,000) $ (87,000) $ (36,000) $ (218,000) $ (8,000) $ (16,000) $ (8,000) $ (383,000) $ (250,000) $ (45,000)
Net income (loss) attributable to Alico Inc. common stockholders     $ 16,509,000 $ 16,244,000 $ 7,547,000 $ (2,467,000) $ 718,000 $ 9,100,000 $ (5,514,000) $ 8,746,000 37,833,000 13,050,000 (9,451,000)
Citree                          
Property, Plant and Equipment [Line Items]                          
Net loss attributable to subsidiary                     781,783 511,854 91,432
Net income (loss) attributable to Alico Inc. common stockholders                     $ 398,709 $ 261,046 $ 46,630
Land                          
Property, Plant and Equipment [Line Items]                          
Area of land owned (in acres) | a     111               111    
Number of primary classifications | classification     2               2    
Mineral Rights                          
Property, Plant and Equipment [Line Items]                          
Area of land owned (in acres) | a     90               90    
ASU 2016-02 | Forecast                          
Property, Plant and Equipment [Line Items]                          
Right-of-use asset $ 511,000                        
Lease liability 511,000                        
Impairment to right of use asset $ 87,000                        
ASC 610-20 | Discontinued Operations, Disposed of by Sale                          
Property, Plant and Equipment [Line Items]                          
Net adjustment to retained earnings   $ 10,897,000