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Debt - Other Instruments (Details) |  |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Aug. 18, 2023 USD ($) | May 19, 2023 USD ($) MW | Dec. 07, 2020 USD ($) | Nov. 30, 2020 USD ($) | Apr. 30, 2023 USD ($) position | Jan. 31, 2019 USD ($) position | Nov. 30, 2015 USD ($) | Oct. 31, 2015 USD ($) position | Oct. 31, 2023 USD ($) | Oct. 31, 2022 USD ($) | Oct. 31, 2021 USD ($) | Oct. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of long term debt |  |  |  |  |  |  |  |  | $ 47,830,000 | $ 9,544,000 | $ 98,642,000 |
Orion Energy Partners Investment Agent, LLC Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments Of Debt |  |  | $ 87,300,000 |  |  |  |  |  |  |  |  |
Debt instrument prepayment premium |  |  | 4,000,000.0 | $ 14,900,000 |  |  |  |  |  |  |  |
Remaining deferred finance expense |  |  | 7,100,000 |  |  |  |  |  |  |  |  |
Orion Energy Partners Investment Agent, LLC Credit Facility | Senior Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000.0
Orion Energy Partners Investment Agent, LLC Credit Facility | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Debt instrument prepayment premium |  |  | $ 4,000,000.0 |  |  |  |  |  |  |  |  |
Connecticut Green Bank Loan (Bridgeport Fuel Cell Project) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  | 3,507,000 |  |
Connecticut Green Bank Loan (Bridgeport Fuel Cell Project) | Subordinated Credit Agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long term loan |  | $ 3,500,000 |  |  |  |  |  |  |  |  |  |
Liberty Bank Term Loan Agreement (Bridgeport Fuel Cell Project) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  | 5,382,000 |  |
Fifth Third Bank Term Loan Agreement (Bridgeport Fuel Cell Project) |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  | 5,382,000 |  |
Fifth Third Bank Term Loan Agreement (Bridgeport Fuel Cell Project) | Senior credit agreement |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayment of long term loan |  | $ 8,400,000 |  |  |  |  |  |  |  |  |  |
Fifth Third Bank Term Loan Agreement (Bridgeport Fuel Cell Project) | Senior credit agreement | Bridgeport Fuel Cell, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capacity Of Plant | MW |  | 14.9 |  |  |  |  |  |  |  |  |  |
Connecticut Green Bank Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments of long term debt |  |  |  |  |  |  |  |  | 4,800,000 |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  |  | 4,800,000 |  |
Subordinated Credit Agreement | Connecticut Green Bank Loans | Bridgeport Fuel Cell, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Capacity Of Plant | MW |  | 14.9 |  |  |  |  |  |  |  |  |  |
Back Leverage Financing | Liberty Lender |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest rate (as a percent) | 6.75% |  |  |  |  |  |  |  |  |  |  |
Connecticut Green Bank Loans |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Repayments Of Debt | $ 3,000,000.0 |  |  |  |  |  |  |  |  |  |  |
Finance obligation for sale-leaseback transactions |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  | 18,814,000 | 56,625,000 |  |
Finance obligations for sale leaseback agreements |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Future payments included in financing obligation for the remaining lease |  |  |  |  |  |  |  |  | $ 9,100,000 |  |  |
Purchase right percentage of projected assets at fair market value |  |  |  |  |  |  |  |  | 31.00% |  |  |
Finance obligations for sale leaseback agreements | PNC Energy Capital, LLC |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  | $ 18,800,000 | 56,600,000 |  |
State of Connecticut Loan |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Long-term line of credit |  |  |  |  |  |  |  |  | $ 6,908,000 | $ 7,774,000 |  |
Debt instrument, face amount |  |  |  |  |  |  | $ 10,000,000.0 | $ 10,000,000.0 |  |  |  |
Interest rate (as a percent) |  |  |  |  |  |  |  | 2.00% |  |  |  |
Debt instrument term |  |  |  |  |  |  |  | 15 years |  |  |  |
Debt instrument, payment terms, period principal payments are deferred |  |  |  |  |  |  |  | 4 years |  |  |  |
Debt instrument, date of first required payment |  |  |  |  |  |  |  | Dec. 01, 2019 |  |  |  |
Amount of loan forgiveness |  |  |  |  |  | $ 2,000,000.0 |  |  |  |  |  |
Loans Forgiveness Terms |  |  |  |  |  |  |  |  | if the Company created 165 full-time positions and retained 538 full-time positions for two consecutive years (as amended from time to time, the “Employment Obligation”) as measured on October 28, 2017 (as amended from time to time, the “Target Date”). The Assistance Agreement was subsequently amended in April 2017 to extend the Target Date by two years to October 28, 2019. |  |  |
Number of full time positions required to be created | position |  |  |  |  |  | 91 |  | 165 |  |  |  |
Number of full time positions required to be retained | position |  |  |  |  | 538 | 538 |  | 538 |  |  |  |
Consecutive term for average number of employees |  |  |  |  | 24 months | 24 months | 2 years |  |  |  |  |
Principal payable number of employee under employee obligation target |  |  |  |  | $ 14,225.00 |  |  |  |  |  |  |
Number of minimum full time positions required to be maintained | position |  |  |  |  | 91 |  |  |  |  |  |  |
Number of minimum full time positions required to be maintained including additional employment positions | position |  |  |  |  | 629 |  |  |  |  |  |  |
Additional credits to be earned |  |  |  |  | $ 2,000,000.0 |  |  |  |  |  |  |
Debt Instrument, Period After Employment Period For Submission Of Job Audit |  |  |  |  | 90 days |  |  |  |  |  |  |
State of Connecticut Loan | Maximum |  |  |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Amount of loan forgiveness |  |  |  |  |  |  |  |  | $ 5,000,000.0 |  |  |

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)(a)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 + Details
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- Definition Amount of cash outflow for short-term and long-term debt. Excludes payment of lease obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 946 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.6-03(i)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479886/946-10-S99-3 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-15 + Details
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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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