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Debt - OpCo Financing Facility (Details)
 12 Months Ended
May 19, 2023
USD ($)
project
Oct. 31, 2024
USD ($)
Oct. 31, 2023
USD ($)
Debt Instrument [Line Items]      
Derivative asset   $ 1,200,000 $ 4,100,000
Number of leased projects ownership reacquired | project 3    
Proceeds from the issuance of debt   23,104,000 100,500,000
Bridgeport Fuel Cell Project      
Debt Instrument [Line Items]      
Encumbrance amount $ 11,400,000    
Bridgeport Fuel Cell Project | Liberty Bank, Fifth Third Bank and Connecticut Green Bank      
Debt Instrument [Line Items]      
Repayments of debt 11,400,000    
Pfizer Project      
Debt Instrument [Line Items]      
Future payments included in financing obligation for the remaining lease 15,700,000    
Riverside Regional Water Quality Control Plant Project      
Debt Instrument [Line Items]      
Future payments included in financing obligation for the remaining lease 3,700,000    
Santa Rita Jail Project      
Debt Instrument [Line Items]      
Future payments included in financing obligation for the remaining lease $ 2,800,000    
OpCo Financing Facility      
Debt Instrument [Line Items]      
Number of projects serving as security | project 6    
Payments of debt issuance costs $ 2,900,000    
Funds released from restricted and unrestricted reserve account 7,300,000    
Capital expenditure reserve funded out of debt 14,500,000    
Funds Released from Restricted Cash 11,200,000    
Proceeds from debt, distributed to company 34,900,000    
Unrestricted cash 46,100,000    
Capital Expenditure Reserve $ 29,000,000    
Debt Instrument, Period After Closing To Enter Hedge Transaction 30 days    
Gain from fair value adjustment of debt   $ 3,100,000 $ 3,300,000
Threshold annual operating expense budget as percent of base case model, approval from lenders 115.00%    
Annual operating expense budget approval from lenders, lending percent 50.00%    
Trailing period for debt service coverage ratio 12 months    
Debt service coverage ratio, testing frequency 6 months    
Quarterly principal payment $ 675,000    
Proceeds from the issuance of debt 77,600,000    
OpCo Financing Facility | Sale-leaseback Arrangements with PNC      
Debt Instrument [Line Items]      
Repayments of debt $ 15,000,000    
OpCo Financing Facility | Interest Rate Swap | First four years      
Debt Instrument [Line Items]      
Net interest rate 6.366%    
OpCo Financing Facility | Interest Rate Swap | Thereafter      
Debt Instrument [Line Items]      
Net interest rate 6.866%    
OpCo Financing Facility | LIPA Yaphank Solid Waste Management Project      
Debt Instrument [Line Items]      
Extension term of gas agreement 3 years    
Period to exercise option to purchase member interest in tax equity partnership 6 months    
OpCo Financing Facility | Maximum      
Debt Instrument [Line Items]      
Notional amount of hedge 105.00%    
OpCo Financing Facility | Minimum      
Debt Instrument [Line Items]      
Notional amount of hedge 75.00%    
Debt service coverage ratio 1.20%    
OpCo Financing Facility | Letter of credit      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity $ 6,500,000    
Term to maintain debt service coverage ratio 6 months    
OpCo Financing Facility | Senior Term Loan      
Debt Instrument [Line Items]      
Line of credit facility, maximum borrowing capacity $ 80,500,000    
Principal amortization period 17 years    
Debt instrument term 7 years    
Debt service coverage ratio 1.30%    
Debt instrument, face amount $ 80,500,000    
OpCo Financing Facility | Senior Term Loan | Applicable interest period one      
Debt Instrument [Line Items]      
Interest period 1 month    
OpCo Financing Facility | Senior Term Loan | Applicable interest period two      
Debt Instrument [Line Items]      
Interest period 3 months    
OpCo Financing Facility | Senior Term Loan | Applicable interest period three      
Debt Instrument [Line Items]      
Interest period 6 months    
OpCo Financing Facility | Senior Term Loan | SOFR rate      
Debt Instrument [Line Items]      
Initial interest period 3 months    
OpCo Financing Facility | Senior Term Loan | SOFR rate | First four years      
Debt Instrument [Line Items]      
Interest rate, basis points 2.50%    
OpCo Financing Facility | Senior Term Loan | SOFR rate | Thereafter      
Debt Instrument [Line Items]      
Interest rate, basis points 3.00%    
OpCo Financing Facility | Senior Term Loan | Base rate | First four years      
Debt Instrument [Line Items]      
Interest rate, basis points 1.50%    
OpCo Financing Facility | Senior Term Loan | Base rate | Thereafter      
Debt Instrument [Line Items]      
Interest rate, basis points 2.00%    
OpCo Financing Facility | Senior Term Loan | Interest Rate Swap      
Debt Instrument [Line Items]      
Notional amount of hedge 100.00%    
Interest rate 3.716%    
Connecticut Green Bank Notes      
Debt Instrument [Line Items]      
Repayments of debt $ 1,800,000    
PNC Energy Capital, LLC      
Debt Instrument [Line Items]      
Repayments of debt $ 7,300,000