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v2.4.1.9

Shareholders' Equity (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2015 | Apr. 30, 2014 | Apr. 30, 2015 | Apr. 30, 2014
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 4,300,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 5,000,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 4,300,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights | 5,000,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 3.35 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |  | $ 3.35 us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest |  |  | $ 98,449 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures |  |  | 1,507 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation |
Stock Issued During Period, Value, New Issues |  |  | 16,660 us-gaap_StockIssuedDuringPeriodValueNewIssues |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures |  |  | (329)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures |
Dividends, Preferred Stock | (800)us-gaap_DividendsPreferredStock | (800)us-gaap_DividendsPreferredStock | (1,600)us-gaap_DividendsPreferredStock | (1,600)us-gaap_DividendsPreferredStock
Foreign currency translation adjustments | (52)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax | 130 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax | (340)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax | 110 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax
Net Loss | (9,997)us-gaap_ProfitLoss | (16,039)us-gaap_ProfitLoss | (14,151)us-gaap_ProfitLoss | (26,854)us-gaap_ProfitLoss
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest | 100,196 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |  | 100,196 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest |
Proceeds from Issuance of Common Stock |  |  | 16,773 us-gaap_ProceedsFromIssuanceOfCommonStock | 36,854 us-gaap_ProceedsFromIssuanceOfCommonStock
Class of Warrant or Right, Unissued | 1,250,000 us-gaap_ClassOfWarrantOrRightUnissued |  | 1,250,000 us-gaap_ClassOfWarrantOrRightUnissued |
Class of Warrant or Right, Outstanding | 2,250,000 us-gaap_ClassOfWarrantOrRightOutstanding |  | 2,250,000 us-gaap_ClassOfWarrantOrRightOutstanding |
Class of Warrant or Right, Weighted Average Strike Price of Warrants or Rights Outstanding | $ 1.98 fcel_ClassofWarrantorRightWeightedAverageStrikePriceofWarrantsorRightsOutstanding |  | $ 1.98 fcel_ClassofWarrantorRightWeightedAverageStrikePriceofWarrantsorRightsOutstanding |
Parent [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest |  |  | 99,987 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Stock Granted During Period, Value, Share-based Compensation, Net of Forfeitures |  |  | 1,507 us-gaap_StockGrantedDuringPeriodValueSharebasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Stock Issued During Period, Value, New Issues |  |  | 16,660 us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures |  |  | (329)us-gaap_StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Dividends, Preferred Stock |  |  | (1,600)us-gaap_DividendsPreferredStock / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Foreign currency translation adjustments |  |  | (340)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Reclass of noncontrolling interest due to liquidation of subsidiary |  |  | (1,308)fcel_ReclassOfNoncontrollingInterestDueToLiquidationOfSubsidiary / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Net Loss |  |  | (13,960)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest | 100,617 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |  | 100,617 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_ParentMember |
Noncontrolling Interest [Member] |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Stockholders' equity (decifit), Including Portion Attributable to Noncontrolling Interest |  |  | (1,538)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Reclass of noncontrolling interest due to liquidation of subsidiary |  |  | 1,308 fcel_ReclassOfNoncontrollingInterestDueToLiquidationOfSubsidiary / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Net Loss |  |  | (191)us-gaap_ProfitLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Stockholders' equity (deficit), Including Portion Attributable to Noncontrolling Interest | (421)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  | (421)us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |
Common Stock [Member] | Common Stock [Member] |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  | 11,523,647 us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Proceeds from Issuance of Common Stock |  |  | $ 16,700 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementClassOfStockAxis = us-gaap_CommonStockMember / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
NRG Energy, Inc. [Member] |  |  |  |
Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 2,000,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_MajorCustomersAxis = fcel_NRGEnergyInc.Member |  | 2,000,000 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_MajorCustomersAxis = fcel_NRGEnergyInc.Member |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |
Common Stock, Capital Shares Reserved for Future Issuance | 5,000,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_MajorCustomersAxis = fcel_NRGEnergyInc.Member |  | 5,000,000 us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_MajorCustomersAxis = fcel_NRGEnergyInc.Member |

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