Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands	Jul. 31, 2022	Oct. 31, 2021
Accounts Receivable, Net and Unbilled Receivables
Product, Service and Generation, Amount billed	$ 10,032	$ 13,854
Product, Service and Generation, Unbilled receivables	8,505	7,175
Product, Service and Generation, Accounts receivable	18,537	21,029
Advanced Technologies including U.S. government, Amount billed	2,069	876
Advanced Technologies including U.S. government, Unbilled receivables	1,956	1,749
Advanced Technologies including U.S. government, Accounts receivable	4,025	2,625
Accounts receivable, net and unbilled receivables	$ 22,562	$ 23,654