Capacity of plant.

No definition available.

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Balance Type:	na
Period Type:	duration

- Definition

The amount of charges for the difference between carrying value of the project asset less the carrying value of inventory components that could be redeployed for alternative use.

+ References

No definition available.

+ Details

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

- Definition

Amount of depreciation expense on project assets.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Long term project assets construction in progress.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount non-recoverable costs incurred that have been expensed as generation cost of revenues.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of project assets.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Capacity of under construction power plant.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	dtr-types:powerItemType
Balance Type:	na
Period Type:	duration

- 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

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The net book value of the asset(s) sold in connection with the sale of the property to another party and lease back to the seller.

+ References

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	instant

- Details

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Project Assets - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2022 MW	Oct. 31, 2024 USD ($) item kW MW	Oct. 31, 2023 USD ($) item	Oct. 31, 2022 USD ($)
Project Assets
Number of project assets \| item		12	9
Long-term project assets construction in progress		$ 0.2	$ 90.6
Impairment charges			2.4
Project asset depreciation		26.9	19.0	$ 14.2
Hartford
Project Assets
Impairment charges				$ 0.8
Power Purchase Agreement
Project Assets
Sale leaseback transaction, net book value		$ 242.0	167.5
Trinity College Project
Project Assets
Power capacity under construction phase \| kW		250
Impairment charges		$ 1.3
UConn Project
Project Assets
Power capacity under construction phase \| MW		1
Impairment charges		$ 1.3
Toyota Project
Project Assets
Impairment charges		$ 3.6
Non-recoverable costs charged off as cost of revenue			22.9
Amount of charges for the difference between carrying value of the project asset less the carrying value of inventory components			$ 22.1
CT RFP-1, Hartford, CT \| Hartford
Project Assets
Capacity Of Plant \| MW	7.4
SCEF - Hartford, CT \| Hartford
Project Assets
Capacity Of Plant \| MW	1