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Accounts Receivable Level 2 (Policies)	9 Months Ended
Accounts Receivable Level 2 (Policies)	Jul. 31, 2012
Accounts Receivable [Abstract]
Revenue Recognition, Policy [Policy Text Block]	We bill customers for power plant and module kit sales based on certain milestones being reached. We bill the U.S. government for research and development contracts based on actual recoverable costs incurred, typically in the month subsequent to incurring costs.

Disclosure of accounting policy for revenue recognition. If the entity has different policies for different types of revenue transactions, the policy for each material type of transaction is generally disclosed. If a sales transaction has multiple element arrangements (for example, delivery of multiple products, services or the rights to use assets) the disclosure may indicate the accounting policy for each unit of accounting as well as how units of accounting are determined and valued. The disclosure may encompass important judgment as to appropriateness of principles related to recognition of revenue. The disclosure also may indicate the entity's treatment of any unearned or deferred revenue that arises from the transaction.

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