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Accounts Receivable (Details) (USD $) | Oct. 31, 2013 | Oct. 31, 2012
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
U.S. Government Amount Billed | $ 786,000 | $ 20,000
U.S. Government Unbilled Recoverable Costs | 639,000 | 890,000
U.S. Government Accounts Receivable Total | 1,425,000 | 910,000
Commercial Customers Amount Billed | 17,344,000 | 18,786,000
Commercial Customers Unbilled Recoverable Costs | 30,347,000 | 6,288,000
Commercial Customers Accounts Receivable Total | 47,691,000 | 25,074,000
Accounts receivable, net of allowance for doubtful accounts | 49,116,000 | 25,984,000
Allowance for Doubtful Accounts Receivable, Current | 14,000 | 600,000
POSCO Energy [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Accounts Receivable, Related Parties, Current | 17,400,000 | 18,100,000
Dominion Bridgeport FuelCell Park [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commercial Customers Unbilled Recoverable Costs | 17,800,000 |
POSCO Energy [Member] |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Commercial Customers Unbilled Recoverable Costs | $ 6,700,000 |

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- Definition Amount billed to customers under long-term contracts or programs but not paid. Excludes amounts due that have been withheld because of retainage provisions in a contract. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 910 -SubTopic 310 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6471494&loc=d3e49354-109356 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3(c)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph c -Article 5 + Details
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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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