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Commitments and Contingencies (Details) (USD $)
 12 Months Ended
Oct. 31, 2014
Oct. 31, 2013
Oct. 31, 2012
Commitments and Contingencies Disclosure [Abstract]      
Capital Lease Obligations $ 721,000us-gaap_CapitalLeaseObligations $ 497,000us-gaap_CapitalLeaseObligations  
Lease Payment Terms 36 months    
Operating Leases, Rent Expense, Net 1,700,000us-gaap_OperatingLeasesRentExpenseNet 1,600,000us-gaap_OperatingLeasesRentExpenseNet 1,600,000us-gaap_OperatingLeasesRentExpenseNet
Operating Leases, Future Minimum Payments Due, Next Twelve Months 1,978,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent    
Operating Leases, Future Minimum Payments, Due in Two Years 1,087,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears    
Operating Leases, Future Minimum Payments, Due in Three Years 711,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears    
Operating Leases, Future Minimum Payments, Due in Four Years 578,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears    
Operating Leases, Future Minimum Payments, Due in Five Years 330,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears    
Operating Leases, Future Minimum Payments, Due Thereafter 318,000us-gaap_OperatingLeasesFutureMinimumPaymentsDueThereafter    
Operating Leases, Future Minimum Payments Due 5,002,000us-gaap_OperatingLeasesFutureMinimumPaymentsDue    
Capital Leases, Future Minimum Payments Due, Next Twelve Months 276,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueCurrent    
Capital Leases, Future Minimum Payments Due in Two Years 310,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInTwoYears    
Capital Leases, Future Minimum Payments Due in Three Years 110,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInThreeYears    
Capital Leases, Future Minimum Payments Due in Four Years 20,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFourYears    
Capital Leases, Future Minimum Payments Due in Five Years 5,000us-gaap_CapitalLeasesFutureMinimumPaymentsDueInFiveYears    
Capital Leases, Future Minimum Payments Due Thereafter 0us-gaap_CapitalLeasesFutureMinimumPaymentsDueThereafter    
Capital Leases, Future Minimum Payments Due 721,000us-gaap_CapitalLeasesFutureMinimumPaymentsDue    
Reserve for Performance Guarantees 800,000fcel_ReserveForPerformanceGuarantees 500,000fcel_ReserveForPerformanceGuarantees  
Loss Reserve on Service Agreements $ 3,000,000fcel_LossReserveOnServiceAgreements $ 3,700,000fcel_LossReserveOnServiceAgreements