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Nature of Business and Basis of Presentation (Tables) | 12 Months Ended
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Oct. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Percent of customer consolidated revenues [Table Text Block] | The percent of consolidated revenues from each customer for the years ended October 31, 2014, 2013 and 2012, respectively are presented below.
|  | 2014 |  | 2013 |  | 2012
POSCO Energy |  | 69 | % |  | 54 | % |  | 76 | %
The United Illuminating Company |  | 9 | % |  | — | % |  | — | %
Bridgeport Dominion Fuel Cell, LLC |  | 3 | % |  | 29 | % |  | — | %
Department of Energy |  | 4 | % |  | 5 | % |  | 7 | %
NRG Energy |  | 3 | % |  | — | % |  | — | %
Total |  | 88 | % |  | 88 | % |  | 83 | %

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