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Accounts Receivable | 9 Months Ended
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Jul. 31, 2013
Receivables [Abstract] |
Accounts Receivable | Accounts Receivable Accounts receivable at July 31, 2013 and October 31, 2012 consisted of the following:
| July 31, 2013 |  | October 31, 2012
U.S. Government: |  |  |
Amount billed | $ | 342 |  |  | $ | 20 |
Unbilled recoverable costs | 1,122 |  |  | 890 |
| 1,464 |  |  | 910 |
Commercial Customers: |  |  |
Amount billed | 19,723 |  |  | 18,786 |
Unbilled recoverable costs | 19,163 |  |  | 6,288 |
| 38,886 |  |  | 25,074 |
| $ | 40,350 |  |  | $ | 25,984 |
We bill customers for power plant and module kit sales based on certain milestones being reached. We bill SA's based on the contract price and billing terms of the contracts. The majority of advanced technology contracts are with the U.S. Government. We bill the U.S. Government based on actual recoverable costs incurred, typically in the month subsequent to incurring costs. The remainder of advanced technology contracts are billed based on milestones or costs incurred. Included in Commercial Customers accounts receivable are amounts due from POSCO of $13.8 million and $18.1 million at July 31, 2013 and October 31, 2012, respectively. Unbilled recoverable costs relate to revenue recognized on customer contracts that have not been billed. Accounts receivable are presented net of an allowance for doubtful accounts of $0.6 million at July 31, 2013 and October 31, 2012.

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