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Revolving Credit Facilities - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Oct. 31, 2015
Oct. 31, 2014
Sep. 30, 2011
May. 31, 2011
Debt Instrument [Line Items]        
Combined credit available under terms of agreements $ 65.0      
Weighted average interest rate 1.70% 1.70%    
Line of credit facility outstanding $ 36.9 $ 35.9    
Farm Credit West [Member]        
Debt Instrument [Line Items]        
Credit available under borrowing agreement Revised       $ 40.0
Credit available under borrowing agreement       $ 30.0
Expiration date of credit facility Feb. 01, 2016      
Bank Of America [Member]        
Debt Instrument [Line Items]        
Credit available under borrowing agreement Revised     $ 25.0  
Credit available under borrowing agreement     $ 15.0  
Expiration date of credit facility Feb. 01, 2016