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Accounts Receivable, Net and Unbilled Receivables (Tables) | 9 Months Ended
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Jul. 31, 2022
Accounts Receivable, Net and Unbilled Receivables |
Schedule of Accounts Receivable, Net and Unbilled Receivables | Accounts receivable, net and Unbilled receivables as of July 31, 2022 and October 31, 2021 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | July 31, | ​ | October 31,
​ |  | 2022 |  | 2021
Product, Service and Generation: | ​ | ​ | ​ | ​ | ​ | ​
Amount billed | ​ | $ | 10,032 | ​ | $ | 13,854
Unbilled receivables (1) | ​ | ​ | 8,505 | ​ | ​ | 7,175
​ | ​ | ​ | 18,537 | ​ | ​ | 21,029
Advanced Technologies (including U.S. government(2)): | ​ | ​ | ​ | ​ | ​ | ​
Amount billed | ​ | ​ | 2,069 | ​ | ​ | 876
Unbilled receivables | ​ | ​ | 1,956 | ​ | ​ | 1,749
​ | ​ | ​ | 4,025 | ​ | ​ | 2,625
Accounts receivable, net and unbilled receivables | ​ | $ | 22,562 | ​ | $ | 23,654
(1) | Additional long-term unbilled receivables of $10.2 million and $11.6 million are included within “Other assets” as of July 31, 2022 and October 31, 2021, respectively.
(2) | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of July 31, 2022 and October 31, 2021 were $2.6 million and $2.3 million, respectively.

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + 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 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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