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Accounts Receivable, Net and Unbilled Receivables (Tables) | 9 Months Ended
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Jul. 31, 2021
Accounts Receivable, Net and Unbilled Receivables |
Schedule of Accounts Receivable, Net and Unbilled Receivables | Accounts receivable, net and Unbilled receivables as of July 31, 2021 and October 31, 2020 consisted of the following (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | July 31, | ​ | October 31,
​ |  | 2021 |  | 2020
Commercial Customers: | ​ | ​ | ​ | ​ | ​ | ​
Amount billed | ​ | $ | 11,659 | ​ | $ | 7,329
Unbilled receivables (1) | ​ | ​ | 7,333 | ​ | ​ | 7,063
​ | ​ | ​ | 18,992 | ​ | ​ | 14,392
Advanced Technologies (including U.S. government(2)): | ​ | ​ | ​ | ​ | ​ | ​
Amount billed | ​ | ​ | 2,523 | ​ | ​ | 2,234
Unbilled receivables | ​ | ​ | 1,357 | ​ | ​ | 978
​ | ​ | ​ | 3,880 | ​ | ​ | 3,212
Accounts receivable, net and unbilled receivables | ​ | $ | 22,872 | ​ | $ | 17,604
(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.
(2) | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of July 31, 2021 and October 31, 2020 were $1.3 million and $1.1 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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