Sale of Thermal Imaging Business (Details) (USD $)	3 Months Ended
Dec. 30, 2012
Summarized financial information related to the Thermal Imaging Business and is segregated from continuing operations and reported as discontinued operations
Total revenues	$ 1,983,000
Cost and expenses
Cost of revenues	1,810,000
General and administrative expense	42,000
Research and development expense	354,000
Total costs and expenses	(2,206,000)
Income (loss) from operations	(223,000)
Net earnings from discontinued operations	$ (223,000)

This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest.

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The costs incurred in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, excluding in-process research and development acquired in a business combination consummated during the period. Excludes software research and development, which has a separate concept.

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- Definition

The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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