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Accounts Receivable, Net - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands | Jul. 31, 2018 | Oct. 31, 2017
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Receivables [Abstract] |  |  |
Contract receivable |  | $ 24,196 | $ 41,073
Unbilled contracts receivables | [1] | 9,512 | 18,162
Commercial customers accounts receivable |  | 33,708 | 59,235
Advanced Technologies including U.S. government, Amount billed receivable |  | 1,208 | 1,934
Advanced Technologies including U.S. government, Unbilled receivables |  | 4,514 | 7,352
Advanced Technologies including U.S. government, Accounts receivable | [2] | 5,722 | 9,286
Accounts receivable, net |  | $ 39,430 | $ 68,521
[1] | Additional long-term unbilled receivables of $8.9 million and $12.8 million are included within “Other Assets” as of July 31, 2018 and October 31, 2017, respectively.
[2] | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of July 31, 2018 and October 31, 2017 were $2.6 million and $3.2 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=68054760&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=6877327&loc=d3e13212-122682 + Details
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