Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Sep. 30, 2018
Dec. 03, 2018
Mar. 29, 2018
Document and Entity Information:      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Sep. 30, 2018    
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus FY    
Entity Registrant Name ALICO INC    
Entity Central Index Key 0000003545    
Current Fiscal Year End Date --09-30    
Entity Filer Category Accelerated Filer    
Entity Well-Known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Emerging Growth Company false    
Entity Smaller Reporting Company false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding (in shares)   7,454,795  
Entity Public Float     $ 89,596,038