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Related party transactions (Details Textual) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Jan. 31, 2013
Jan. 31, 2012
Jan. 31, 2013
Jan. 31, 2012
Oct. 31, 2012
Director [Member]
         
Related party transaction (Textual) [Abstract]          
Accounts payable to related parties $ 0.1   $ 0.1   $ 0.3
Limoneira [Member]
         
Related party transaction (Textual) [Abstract]          
Dividend income from Limoneira 0.1 0.1      
LIG [Member]
         
Related party transaction (Textual) [Abstract]          
Rent paid 0.1 0.1      
Third Coast [Member]
         
Related party transaction (Textual) [Abstract]          
Aggregate amount of avocados procured from entities owned or controlled by members of our Board of Directors     0.5 0.4  
Sales made to Third Coast 1.1 0.8      
Amounts due from Third Coast 1.0   1.0   0.8
Accounts payable to related parties 0.1   0.1   0.1
THNC [Member]
         
Related party transaction (Textual) [Abstract]          
Rent paid 0.1        
Avocados [Member] | Director [Member]
         
Related party transaction (Textual) [Abstract]          
Aggregate amount of avocados procured from entities owned or controlled by members of our Board of Directors $ 0.3 $ 0.3