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Accounts Receivable (Details) (USD $) | Apr. 30, 2014 | Oct. 31, 2013
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Government Contract Receivable | $ 1,805,000 |  | $ 786,000
Government Contract Receivable, Unbilled Amounts | 1,369,000 |  | 639,000
U.S. Government accounts receivable total | 3,174,000 | [1] | 1,425,000
Contract Receivable | 15,121,000 |  | 17,344,000
Unbilled Contracts Receivable | 16,440,000 |  | 30,347,000
Commercial Customers accounts receivable | 31,561,000 |  | 47,691,000
Accounts Receivable, Net, Current | 34,735,000 |  | 49,116,000
Allowance for Doubtful Accounts Receivable, Current | 60,000 |  | 10,000
POSCO Energy [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Accounts Receivable, Related Parties, Current | 21,700,000 |  | 17,400,000
Dominion Bridgeport FuelCell Park [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Unbilled Contracts Receivable | 0 |  | 17,800,000
Government [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Government Contract Receivable | 800,000 |  |
POSCO Energy [Member] |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Unbilled Contracts Receivable | $ 8,100,000 |  | $ 6,700,000
[1] | Total U.S. Government accounts receivable outstanding at April 30, 2014 is $0.8 million.

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