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Note 4 - Concentrations (Tables)
12 Months Ended
Sep. 30, 2021
Notes Tables  
Disaggregation of Revenue [Table Text Block]
  

Year Ended September 30,

 
  

2021

  

2020

 

United States

 $131,285,349  $89,021,124 

All Other Countries

  9,470,050   4,053,390 

Total Net Sales

 $140,755,399  $93,074,514 
  

Year Ended September 30,

 
  

2021

  

2020

 

Broadband service providers

 $98% $96%

Legacy customers

  2%  4%

Total Net Sales

 $100% $100%