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Note 15 - Major Customers, Suppliers, Segment and Related Information | 12 Months Ended
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Sep. 30, 2013
Major Customers [Abstract] |
Major Customers [Text Block] | 15. MAJOR CUSTOMERS, SUPPLIERS, SEGMENT AND RELATED INFORMATION Major Customers For the fiscal year ended September 30, 2013, revenues from three customers accounted for 15%, 14% and 10% of total revenues. No other single customer represented more than 10% of total revenues. For the fiscal year ended September 30, 2012, revenues from one customer accounted for 36% of total revenues with no other single customer accounting for more than 10% of total revenues. Suppliers The Company has a large number of components and sub-assemblies produced by outside suppliers, some of which are sourced from a single supplier, which can magnify the risk of shortages and decrease the Company’s ability to negotiate with suppliers on the basis of price. In particular, the Company depends on one supplier of compression drivers for its LRAD products. If supplier shortages occur, or quality problems arise, then production schedules could be significantly delayed or costs significantly increased, which could in turn have a material adverse effect on the Company’s financial condition, results of operation and cash flows. Segment and Related Information The Company presents its business as one reportable segment due to the similarity in nature of products marketed, financial performance measures (revenue growth and gross margin), methods of distribution (direct and indirect) and customer markets (each product is sold by the same personnel to government and commercial customers, domestically and internationally). The Company’s chief operating decision making officer reviews financial information on sound products on a consolidated basis. The following table summarizes revenues by geographic region. Revenues are attributed to countries based on customer location.
Years Ended September 30, |  | 2013 |  |  | 2012 |
Revenues |  |  |  |  |  |  |  |
| United States |  | $ | 7,096,257 |  |  | $ | 9,358,311 |
| Other |  |  | 9,991,673 |  |  |  | 5,434,027 |
| Total Revenues |  | $ | 17,087,930 |  |  | $ | 14,792,338 |

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