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Business Segments	12 Months Ended
	Sep. 30, 2017
Business Segments
Business Segments	17. Business Segments The Company operates in one business segment which designs, manufactures and sells flat panel displays, flight information computers, and advanced monitoring systems to the DoD, the Department of Interior (“DOI”), other government agencies, commercial air transport carriers, and corporate/general aviation markets. The Company currently derives virtually all of its revenues from the sale of this equipment and related EDC. Most of the Company’s sales, operating results, and identifiable assets are in the United States. During fiscal 2017, 2016 and 2015, IS&S derived 89%, 95% and 98%, respectively, of its total product revenues from the sale of FPDS. During fiscal 2017, 2016 and 2015, the Company derived 11%, 5% and 2%, respectively, of total product revenues from the sale of air data systems related products. During fiscal 2017, 2016 and 2015, the Company derived 4%, 4% and 27%, respectively, of total revenues from the sale of EDC services. Geographic Data Most of the Company’s sales, operating results and identifiable assets are in the United States. In fiscal years 2017, 2016 and 2015, net sales outside the United States amounted to $2.6 million, $8.2 million and $6.6 million, respectively. Product Data The Company’s current product line includes FPDS, flight management systems, and air data systems and components. During fiscal 2017, 2016 and 2015, the Company derived 89%, 95% and 98%, respectively, of its revenue from sales of FPDS. The remaining revenue for each of the fiscal years was from sales of air data systems and components.

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- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI http://asc.fasb.org/topic&trid=2134510

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