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Accounts Receivable, Net and Unbilled Receivables | 12 Months Ended
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Oct. 31, 2019
Receivables [Abstract] |
Accounts Receivable, Net and Unbilled Receivables | Note 5. Accounts Receivable, Net and Unbilled Receivables Accounts receivable, net and unbilled receivables as of October 31, 2019 and 2018 consisted of the following (in thousands):
|  | 2019 |  |  | 2018 |
Commercial customers: |  |  |  |  |  |  |  |
Amount billed |  | $ | 2,227 |  |  | $ | 7,415 |
Unbilled receivables (1) |  |  | 6,139 |  |  |  | 10,632 |
|  |  | 8,366 |  |  |  | 18,047 |
Advanced Technologies (including U.S. Government(2)): |  |  |  |  |  |  |  |
Amount billed |  |  | 1,065 |  |  |  | 1,865 |
Unbilled receivables |  |  | 1,545 |  |  |  | 3,127 |
|  |  | 2,610 |  |  |  | 4,992 |
Accounts receivable, net and unbilled receivables |  | $ | 10,976 |  |  | $ | 23,039 |
(1) | Additional long-term unbilled receivables of $3.6 million and $9.4 million are included within “Other Assets” as of October 31, 2019 and 2018, respectively. The balance decreased because amounts previously recorded in connection with the Bridgeport Fuel Cell Project service agreement were settled in connection with the acquisition of the Bridgeport Fuel Cell Project.
(2) | Total U.S. government accounts receivable, including unbilled receivables, outstanding as of October 31, 2019 and 2018 were $1.2 million and $2.3 million, respectively.
We bill customers for power plant and power plant component sales based on certain contractual milestones being reached. We bill service agreements based on the contract price and billing terms of the contracts. Generally, our Advanced Technologies contracts are billed based on actual revenues recorded, typically in the subsequent month. Some Advanced Technologies contracts are billed based on contractual milestones or costs incurred. Unbilled receivables relate to revenue recognized on customer contracts that have not been billed. Accounts receivable are presented net of an allowance for doubtful accounts of $0.2 million as of October 31, 2018. The Company had no allowance for doubtful accounts as of October 31, 2019. Uncollectible accounts receivables are charged against the allowance for doubtful accounts when all collection efforts have failed and it is deemed unlikely that the amount will be recovered.

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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