Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) (Parenthetical) - USD ($) $ in Thousands		Jul. 31, 2020	Oct. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables	[1]	$ 6,481	$ 6,139
Government [Member]
Accounts Notes And Loans Receivable [Line Items]
U.S. government accounts receivable, including unbilled receivables		1,300	1,200
Other Assets [Member]
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables		$ 6,100	$ 3,600

[1] Additional long-term unbilled receivables of $6.1 million and $3.6 million are included within “Other Assets” as of July 31, 2020 and October 31, 2019, respectively.