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Accrued Liabilities - Schedule of Accrued Liabilities (Parenthetical) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2022 | Jul. 31, 2021 | Oct. 31, 2021
Schedule Of Accrued Liabilities [Line Items] |  |  |  |  |
Product warranty accrual, payment and adjustments | $ 200 | $ 7 | $ 400 | $ 19 |
Loss reserve on service agreements | 6,400 |  | 6,400 |  | $ 6,500
Bridgeport Fuel Cell Project |  |  |  |  |
Schedule Of Accrued Liabilities [Line Items] |  |  |  |  |
Reserve for performance guarantees | $ 3,600 |  | $ 3,600 |  | $ 2,500

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- Definition loss reserve on service agreements + References No definition available. + Details
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Period Type: | instant

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- Definition reserve for performance guarantees + References No definition available. + Details
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Namespace Prefix: | fcel_
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Balance Type: | credit
Period Type: | instant

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- Definition Schedule of accrued liabilities. + References No definition available. + Details
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- 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 + Details
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- Details
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Namespace Prefix: |
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Period Type: |