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Commitments - Additional Information (Detail) (USD $)
3 Months Ended
Jan. 31, 2015
Commitments And Contingencies [Line Items]  
Operating Leases, Rent Expense, Net, Total $ 513,000us-gaap_OperatingLeasesRentExpenseNet
Minimum annual rental payments $ 19,000us-gaap_SaleLeasebackTransactionAnnualRentalPayments
Lease Expiration Date Mar. 31, 2017