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Project Assets - Summary of Project Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Oct. 31, 2022	Oct. 31, 2021
Project Assets [Line Items]
Accumulated depreciation	$ (29,546)	$ (19,844)
Project Assets - Operating, net	125,190	96,442
Project Assets, net	232,886	223,277
Project Assets - Operating [Member]
Project Assets [Line Items]
Project Assets, gross	$ 154,736	116,286
Project Assets - Operating [Member] | Minimum
Project Assets [Line Items]
Project assets estimated useful life	4 years
Project Assets - Operating [Member] | Maximum
Project Assets [Line Items]
Project assets estimated useful life	20 years
Project Assets - Construction in progress [Member]
Project Assets [Line Items]
Project Assets, gross	$ 107,696	$ 126,835
Project Assets - Construction in progress [Member] | Minimum
Project Assets [Line Items]
Project assets estimated useful life	7 years
Project Assets - Construction in progress [Member] | Maximum
Project Assets [Line Items]
Project assets estimated useful life	20 years
Project Assets BOP And Site Construction [Member]
Project Assets [Line Items]
Project assets estimated useful life	20 years
Project Assets Modules [Member] | Minimum
Project Assets [Line Items]
Project assets estimated useful life	4 years
Project Assets Modules [Member] | Maximum
Project Assets [Line Items]
Project assets estimated useful life	7 years

X

- Definition

Long-term project assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Long term project assets gross.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of long term project assets excluding construction in progress, net of accumulated depreciation as on the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Project asset accumulated depreciation.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Project assets.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
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Balance Type:
Period Type:

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- Details

Name:	srt_RangeAxis=srt_MaximumMember
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Balance Type:
Period Type:

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CapitalizedCostsOfUnprovedPropertiesExcludedFromAmortizationByPropertyOrProjectAxis=fcel_ProjectAssetsBopAndSiteConstructionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: