Amount of legal, taxes and professional charges accrued during the period.

No definition available.

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Namespace Prefix:	fcel_
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- Definition

loss reserve on service agreements

+ References

No definition available.

+ Details

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- Definition

The cash outflow for contractual obligations during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

reserve for performance guarantees

+ References

No definition available.

+ Details

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Namespace Prefix:	fcel_
Data Type:	xbrli:monetaryItemType
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- Definition

Schedule of accrued liabilities.

+ References

No definition available.

+ Details

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- Definition

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph ((c)(2))
-URI http://asc.fasb.org/extlink&oid=123368208&loc=d3e12565-110249

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

- Details

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Namespace Prefix:
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- Details

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Accrued Liabilities - Schedule of Accrued Liabilities (Parenthetical) (Details) - USD ($) $ in Thousands		3 Months Ended
	Dec. 30, 2021	Jan. 31, 2022	Jan. 31, 2021	Dec. 23, 2021	Oct. 31, 2021
Schedule Of Accrued Liabilities [Line Items]
Product warranty accrual, payment and adjustments		$ 200	$ 30
Loss reserve on service agreements		5,800			$ 6,500
Contractual Obligation		2,200
POSCO Energy Settlement Agreement
Schedule Of Accrued Liabilities [Line Items]
Increase in legal accrual	$ 10,000
Payments for contractual obligation	14,000
Contractual Obligation	$ 24,000			$ 24,000
Bridgeport Fuel Cell Project
Schedule Of Accrued Liabilities [Line Items]
Reserve for performance guarantees		$ 2,700			$ 2,500