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Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands | Jul. 31, 2022 | Oct. 31, 2021
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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

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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 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 912 -SubTopic 310 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123371682&loc=d3e55302-109406 + Details
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