Goodwill and Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2018
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 4,075,000	$ 4,075,000
Intangible assets, net	19,967,000	21,264,000
Impairment of goodwill	$ 0	0	$ 0
Amortization expense description	Amortization expense is recorded on a straight-line basis and future amortization expense will be $1.3 million per year until the Bridgeport PPA is fully amortized.
2021	$ 1,300,000
2022	1,300,000
2023	1,300,000
2024	1,300,000
2025	1,300,000
2026	1,300,000
Versa Acquisition [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	4,100,000	4,100,000
Intangible assets, net	20,000,000.0	21,300,000
Bridgeport Fuel Cell, LLC [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expenses	$ 1,300,000	$ 600,000