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Summary of Significant Accounting Policies (Details)	3 Months Ended
	Dec. 31, 2012 item
Summary of Significant Accounting Policies
Number of business segments in which the entity operates	1
Revenue Recognition
Minimum number of deliverable for allocating revenue to each deliverable	1
Engineering Development
Percentage of employees who were engineers engaged in various engineering development projects	43.00%
Property and equipment except manufacturing facility | Minimum
Property and Equipment
Estimated useful lives	3 years
Property and equipment except manufacturing facility | Maximum
Property and Equipment
Estimated useful lives	7 years
Corporate airplane and manufacturing facility | Minimum
Property and Equipment
Estimated useful lives	10 years
Corporate airplane and manufacturing facility | Maximum
Property and Equipment
Estimated useful lives	39 years

X

- Definition

Represents the percentage of the entity's employees who were engineers engaged in various engineering development projects.

+ References

No definition available.

+ Details

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X

- Definition

Represents the minimum number of deliverable for allocating revenue to each deliverable based on that deliverable's selling price.

+ References

No definition available.

+ Details

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- Details

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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