Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Oct. 31, 2020
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 4,075		$ 4,075
Intangible assets, net	19,643		19,967
Versa Acquisition [Member]
Goodwill And Intangible Assets [Line Items]
Goodwill	4,100		4,100
Intangible assets, net	19,600		$ 20,000
Bridgeport Fuel Cell, LLC [Member]
Goodwill And Intangible Assets [Line Items]
Amortization expenses	$ 300	$ 300