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Note 8 - Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2025 | Mar. 31, 2024
Total Net Sales | $ 47,168 | $ 36,910 | $ 82,644 | $ 71,140
Total Net Sales, percentage | 100.00% | 100.00% | 100.00% | 100.00%
Broadband Service Providers [Member] |  |  |  |
Total Net Sales, percentage | 94.00% | 93.00% | 94.00% | 93.00%
Legacy Customers [Member] |  |  |  |
Total Net Sales, percentage | 6.00% | 7.00% | 6.00% | 7.00%
UNITED STATES |  |  |  |
Total Net Sales | $ 39,844 | $ 26,963 | $ 69,176 | $ 54,524
Non-US [Member] |  |  |  |
Total Net Sales | $ 7,324 | $ 9,947 | $ 13,468 | $ 16,616

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