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Note 4 - Concentrations (Tables) | 12 Months Ended
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Sep. 30, 2020
Notes Tables |
Disaggregation of Revenue [Table Text Block] |
|  | Year Ended September 30,
|  | 2020 |  | 2019
United States |  | $ | 89,021,000 |  |  | $ | 78,553,000 |
All Other Countries |  |  | 4,054,000 |  |  |  | 6,481,000 |
Total Net Sales |  | $ | 93,075,000 |  |  | $ | 85,034,000 |
|  | Year Ended September 30,
|  | 2020 |  | 2019
Broadband service providers |  | $ | 96 | % |  | $ | 95 | %
Build-to-print customers |  |  | 4 | % |  |  | 5 | %
Total Net Sales |  | $ | 100 | % |  | $ | 100 | %

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