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v3.22.2.2

Stockholders' Equity and Warrant Liabilities - Schedule of Warrant Activity (Details) - Series C Warrants | 9 Months Ended
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Jul. 31, 2022 shares
Class of Warrant or Right, Outstanding | 950,102
Warrants expired | (950,102)

X
- Definition Represents number of warrants expired during the period. + References No definition available. + Details
Name: | fcel_ClassOfWarrantOrRightExpired
Namespace Prefix: | fcel_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of warrants or rights outstanding. + References No definition available. + Details
Name: | us-gaap_ClassOfWarrantOrRightOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ClassOfWarrantOrRightAxis=fcel_SeriesCWarrantsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |