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Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Parenthetical) (Details) - USD ($) $ in Thousands		Jul. 31, 2021	Oct. 31, 2020
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables	[1]	$ 7,333	$ 7,063
Government
Accounts Notes And Loans Receivable [Line Items]
U.S. government accounts receivable, including unbilled receivables		1,300	1,100
Other Assets
Accounts Notes And Loans Receivable [Line Items]
Additional long-term unbilled receivables		$ 13,600	$ 8,900
[1] Additional long-term unbilled receivables of $13.6 million and $8.9 million are included within “Other Assets” as of July 31, 2021 and October 31, 2020, respectively.

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U.S. government accounts receivable including unbilled receivables.

+ References

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- Definition

Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 912
-SubTopic 310
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118261985&loc=d3e55302-109406

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3(c)(3))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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