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Nature of Business and Basis of Presentation (Details) (POSCO Energy [Member]) | 6 Months Ended
--- | ---
Apr. 30, 2014 | Apr. 30, 2013
POSCO Energy [Member] |  |
Common stock ownership percentage | 12.00% |
significant customer revenue percentage | 75.00% | 66.00%

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- Definition Common stock ownership percentage + References No definition available. + Details
Name: | fcel_CommonStockOwnershipPercentage
Namespace Prefix: | fcel_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Percent of consolidated revenue by customer. + References No definition available. + Details
Name: | fcel_SignificantCustomerRevenuePercentage
Namespace Prefix: | fcel_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration