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Accounts Receivable, Net and Unbilled Receivables - Schedule of Accounts Receivable, Net and Unbilled Receivables (Details) - USD ($) $ in Thousands | Jan. 31, 2020 | Oct. 31, 2019
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Receivables [Abstract] |  |  |
Amount billed |  | $ 3,790 | $ 2,227
Unbilled receivables | [1] | 5,770 | 6,139
Commercial customers accounts receivable |  | 9,560 | 8,366
Advanced Technologies including U.S. government, Amount billed |  | 1,803 | 1,065
Advanced Technologies including U.S. government, Unbilled receivables |  | 1,753 | 1,545
Advanced Technologies including U.S. government, Accounts receivable | [2] | 3,556 | 2,610
Accounts receivable, net and unbilled receivables |  | $ 13,116 | $ 10,976
[1] | Additional long-term unbilled receivables of $3.2 million and $3.6 million are included within “Other Assets” as of January 31, 2020 and October 31, 2019, respectively.
[2] | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of January 31, 2020 and October 31, 2019 were $2.0 million and $1.2 million, respectively.

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