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
Dec. 31, 2018
Dec. 31, 2017
Total Net Sales $ 20,089,150 $ 16,866,884
Percent of net sales 100.00% 100.00%
Broadband Service Providers [Member]    
Percent of net sales 94.00% 95.00%
Build-to-print Customers [Member]    
Percent of net sales 6.00% 5.00%
UNITED STATES    
Total Net Sales $ 18,504,467 $ 15,497,661
Non-US [Member]    
Total Net Sales $ 1,584,683 $ 1,369,223