Annual report pursuant to Section 13 and 15(d)

Note 7 - Concentrations - Disaggregation of Revenue (Details)

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Note 7 - Concentrations - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2022
Net sales $ 166,705 $ 268,720 $ 270,883
Percent of net sales 100.00% 100.00% 100.00%
Broadband Service Providers [Member]      
Percent of net sales 94.00% 97.00% 99.00%
Legacy Customers [Member]      
Percent of net sales 6.00% 3.00% 1.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales $ 166,705 $ 268,720 $ 270,883
UNITED STATES | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales 122,483 218,835 255,607
Non-US [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales $ 44,222 $ 49,885 $ 15,276