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Debt - Other Instruments (Details)
 1 Months Ended 12 Months Ended
Aug. 18, 2023
USD ($)
Apr. 30, 2023
USD ($)
position
Jan. 31, 2019
USD ($)
position
Nov. 30, 2015
USD ($)
position
Oct. 31, 2024
USD ($)
Oct. 31, 2023
USD ($)
Oct. 31, 2022
USD ($)
Debt Instrument [Line Items]              
Repayments of long term debt         $ 11,699,000 $ 47,830,000 $ 9,544,000
Long-term line of credit         70,067,000 77,510,000  
Liberty Bank Term Loan Agreement (Bridgeport Fuel Cell Project)              
Debt Instrument [Line Items]              
Long-term line of credit         5,825,000    
Connecticut Green Bank Loan (Subordinated Back Leverage Loan Facility)              
Debt Instrument [Line Items]              
Long-term line of credit         3,500,000    
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            
Finance Obligation for Sale-Lease Back Transactions              
Debt Instrument [Line Items]              
Long-term line of credit         18,811,000 18,814,000  
Finance obligations for sale leaseback agreements              
Debt Instrument [Line Items]              
Future payments included in financing obligation for the remaining lease         $ 10,500,000    
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    
State of Connecticut Loan              
Debt Instrument [Line Items]              
Long-term line of credit         $ 6,024,000 $ 6,908,000  
Debt instrument, face amount       $ 10,000,000      
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        
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 24 months    
Principal payable number of employee under employee obligation target   $ 14,225     $ 14,225    
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          
Number of days within job audit         90 days    
Average number of full time positions         389    
Amount of loan reclassified to current         $ 2,100,000    
Number of days following employment period   90 days          
Amount of fee and interest payable         $ 0    
State of Connecticut Loan | Maximum              
Debt Instrument [Line Items]              
Amount of loan forgiveness       $ 5,000,000