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v3.5.0.2

Nature of Business and Basis of Presentation (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jul. 31, 2016 | Jul. 31, 2015 | Jul. 31, 2016 | Jul. 31, 2015
Common stock ownership percentage | 4.99% |  | 4.99% |
POSCO Energy [Member] |  |  |  |
Common stock ownership percentage | 8.00% |  | 8.00% |
significant customer revenue percentage | 65.00% | 75.00% | 52.00% | 65.00%
NRG Energy [Member] |  |  |  |
Common stock ownership percentage | 4.00% |  | 4.00% |
significant customer revenue percentage | 0.30% | 0.40% | 0.20% | 2.20%

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- Definition Common stock ownership percentage + References No definition available. + Details
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- Definition Percent of consolidated revenue by customer. + References No definition available. + Details
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- Details
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Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |