Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Parenthetical) (Details) - USD ($) $ in Thousands		Oct. 31, 2021	Oct. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables	[1]	$ 7,175	$ 7,063
Government [Member]
Accounts Notes And Loans Receivable [Line Items]
U.S. government accounts receivable, including unbilled receivables		2,300	1,100
Other Assets [Member]
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables		$ 11,600	$ 8,900

[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.