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Note E - Concentrations (Tables) | 12 Months Ended
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Sep. 30, 2018
Notes Tables |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Year Ended September 30,
|  |  | 2018 |  |  |  | 2017 |  |  |  | 2016 |
United States |  | $ | 72,295,000 |  |  | $ | 67,901,000 |  |  | $ | 71,264,000 |
All Other Countries |  |  | 5,356,000 |  |  |  | 6,047,000 |  |  |  | 4,024,000 |
Total Net Sales |  | $ | 77,651,000 |  |  | $ | 73,948,000 |  |  | $ | 75,288,000 |

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