Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands		Oct. 31, 2021	Oct. 31, 2020
Accounts Receivable, Net and Unbilled Receivables
Amount billed		$ 13,854	$ 7,329
Unbilled receivables	[1]	7,175	7,063
Commercial customers accounts receivable		21,029	14,392
Advanced Technologies including U.S. government, Amount billed		876	2,234
Advanced Technologies including U.S. government, Unbilled receivables		1,749	978
Advanced Technologies including U.S. government, Accounts receivable		2,625	3,212
Accounts receivable, net and unbilled receivables		$ 23,654	$ 17,604

[1] Additional long-term unbilled receivables of $11.6 million and $8.9 million are included within “Other Assets” as of October 31, 2021 and 2020, respectively.