Quarterly report pursuant to Section 13 or 15(d)

Note 5 - Revenue - Disaggregation of Revenue (Details)

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Note 5 - Revenue - Disaggregation of Revenue (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Total Net Sales $ 38,735,356 $ 25,970,045 $ 95,519,437 $ 65,756,545
Percent of net sales 100.00% 100.00% 100.00% 100.00%
Broadband Service Providers [Member]        
Percent of net sales 98.00% 97.00% 98.00% 96.00%
Legacy Customers [Member]        
Percent of net sales 2.00% 3.00% 2.00% 4.00%
UNITED STATES        
Total Net Sales $ 35,810,360 $ 25,090,614 $ 89,586,498 $ 62,765,455
Non-US [Member]        
Total Net Sales $ 2,924,996 $ 879,431 $ 5,932,939 $ 2,991,090