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Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands | Oct. 31, 2020 | Oct. 31, 2019
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Receivables [Abstract] |  |  |
Amount billed |  | $ 7,329 | $ 2,227
Unbilled receivables | [1] | 7,063 | 6,139
Commercial customers accounts receivable |  | 14,392 | 8,366
Advanced Technologies including U.S. government, Amount billed |  | 2,234 | 1,065
Advanced Technologies including U.S. government, Unbilled receivables |  | 978 | 1,545
Advanced Technologies including U.S. government, Accounts receivable | [2] | 3,212 | 2,610
Accounts receivable, net and unbilled receivables |  | $ 17,604 | $ 10,976
[1] | Additional long-term unbilled receivables of $8.9 million and $3.6 million are included within “Other Assets” as of October 31, 2020 and 2019, respectively.
[2] | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of October 31, 2020 and 2019 were $1.1 million and $1.2 million, respectively.

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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 Reference 2: 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 + Details
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