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Note 12 - Segment Reporting (Tables)
 6 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Segment Reporting Information, by Segment [Table Text Block]
   
Three Months Ended
    
Six Months Ended
  
   
March 31,
2020
    
March 31,
2019
    
March 31,
2020
    
March 31,
2019
  
Sales
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Wireless
   $
4,671,850
     $
4,217,924
     $
11,469,731
     $
4,217,924
  
Telco
    
7,287,275
      
8,672,016
      
14,451,752
      
15,482,113
  
Total sales
   $
11,959,125
     $
12,889,940
     $
25,921,483
     $
19,700,037
  
                                 
Gross
profit (loss)
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Wireless
   $
175,206
     $
1,288,758
     $
2,047,762
     $
1,288,758
  
Telco
    
(613,843
 )    
2,187,758
      
1,105,583
      
3,911,147
  
Total gross profit (loss)
   $
(438,637
 )   $
3,476,516
     $
3,153,345
     $
5,199,905
  
                                 
Loss from operations
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Wireless
   $
(2,795,785
 )   $
(1,113,584
 )   $
(3,883,229
 )   $
(1,113,584
 )
Telco
    
(11,911,258
 )    
(235,291
 )    
(12,586,535
 )    
(1,243,714
 )
Total loss from operations
   $
(14,707,043
 )   $
(1,348,875
 )   $
(16,469,764
 )   $
(2,357,298
 )
   
March 31,
2020
    
September 30,
2019
  
Segment assets
  
 
 
 
  
 
 
 
Wireless
   $
7,174,283
     $
5,515,793
  
Telco
    
14,079,104
      
22,619,565
  
Non-allocated
    
11,861,295
      
8,692,986
  
Total assets
   $
33,114,682
     $
36,828,344