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Note 18 - Major Customers, Suppliers and Related Information | 12 Months Ended
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Sep. 30, 2018
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] | 18. MAJOR CUSTOMERS, SUPPLIERS AND RELATED INFORMATION Major Customers For the fiscal year ended September 30, 2018, revenues from one customer accounted for 20% of total revenues with no other single customer accounting for more than 10% of total revenues. For the fiscal year ended September 30, 2017, revenues from one customer accounted for 15% of total revenues with no other single customer accounting for more than 10% of total revenues. The following table summarizes revenues by geographic region. Revenues are attributed to countries based on customer’s delivery location.
|  | Years ended September 30, |
|  | 2018 |  |  | 2017 |
Americas |  | $ | 16,488,624 |  |  | $ | 8,688,005 |
Europe, Middle East, and Africa |  |  | 3,238,533 |  |  |  | 1,439,157 |
Asia Pacific |  |  | 6,579,633 |  |  |  | 10,187,016 |
|  | $ | 26,306,790 |  |  | $ | 20,314,178 |
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.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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