Quarterly report [Sections 13 or 15(d)]

Note 8 - Revenue - Disaggregation of Revenue (Details)

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Note 8 - Revenue - Disaggregation of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Total Net Sales $ 43,864 $ 38,755 $ 112,596 $ 109,074
Total Net Sales, percentage 100.00% 100.00% 100.00% 100.00%
Broadband Service Providers [Member]        
Total Net Sales, percentage 100.00% 99.00% 100.00% 98.00%
Legacy Customers [Member]        
Total Net Sales, percentage 0.00% 1.00% 0.00% 2.00%
UNITED STATES        
Total Net Sales $ 42,865 $ 37,414 $ 109,161 $ 106,590
Non-US [Member]        
Total Net Sales $ 999 $ 1,341 $ 3,435 $ 2,484