Nature of Business, Basis of Presentation and Significant Accounting Policies - Percent of Customer Consolidated Revenues (Details) - Sales Revenue Net Member - Customer Concentration Risk Member	12 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Korea Southern Power Company [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage	31.00%	6.00%	12.00%
Korea Fuel Cell Co. Limited [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage	16.00%	46.00%
Connecticut Light And Power. [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage	13.00%	14.00%	20.00%
ExxonMobil Technology and Engineering Company [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage	8.00%	8.00%	29.00%
Top Customers [Member]
Nature Of Business And Basis Of Presentation [Line Items]
Significant customer revenue percentage	68.00%	74.00%	61.00%