Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Policies - Narrative (Details)

v3.25.3
Summary of Significant Accounting Policies - Narrative (Details)
 12 Months Ended
Sep. 30, 2025
USD ($)
shares
Sep. 30, 2024
USD ($)
shares
Oct. 31, 2024
USD ($)
Oct. 30, 2023
a
Property, Plant and Equipment [Line Items]        
Accounts receivable, net $ 1,014,000 $ 771,000    
Area of land owned (in acres) | a       3,300
Federal insured limit 250,000      
Restricted cash 762,000 248,000    
Accounts receivable, allowance for credit loss (60,000) (73,000)    
Accounts receivable, allowance for credit loss, writeoff 0 0    
Proceeds from grower's support payments 1,330,000 2,962,000    
Reduction in operating expenses for grants received with a credit balance 905,000 1,805,000    
Impairment charges 24,966,000 0    
Impairment loss $ 0 $ 0    
Number of options (in shares) | shares 36,500 38,000    
Market Based Restricted Stock Units        
Property, Plant and Equipment [Line Items]        
Number of nonvested (in shares) | shares 38,000 0    
Inventories        
Property, Plant and Equipment [Line Items]        
Proceeds from grower's support payments $ 425,000 $ 1,192,000 $ 35,000  
Citrus trees        
Property, Plant and Equipment [Line Items]        
Accounts receivable, net $ 575,000 $ 444,000    
Pre-productive maintenance costs capitalization period 4 years      
Useful life 25 years