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, 2023
Sep. 30, 2022
Sep. 30, 2021
Net sales $ 268,720 $ 270,883 $ 140,755
Percent of net sales 100.00% 100.00% 100.00%
Broadband Service Providers [Member]      
Percent of net sales 97.00% 99.00% 98.00%
Legacy Customers [Member]      
Percent of net sales 3.00% 1.00% 2.00%
Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales $ 268,720 $ 270,883 $ 140,755
UNITED STATES | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales 218,835 255,607 131,285
Non-US [Member] | Revenue Benchmark [Member] | Geographic Concentration Risk [Member]      
Net sales $ 49,885 $ 15,276 $ 9,470