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Note 4 - Revenue Recognition (Tables)
 12 Months Ended
Sep. 30, 2019
Notes Tables  
Contract with Customer, Asset and Liability [Table Text Block]
   
Prepaid maintenance
  
   
agreement
  
Balance at September 30, 2018
   $
93,750
  
New prepaid maintenance agreements
    
-
  
Recognition of expense as a result of performing services
    
(93,750
 )
Balance at September 30, 2019
   $
-
  
   
Customer
deposits
    
Deferred
revenue
    
Total contract
liabilities
 
Balance at September 30, 2018
   $
199,596
     $
536,458
     $
736,054
  
New performance obligations
    
7,241,768
      
1,627,331
      
8,869,099
  
Recognition of revenue as a result of satisfying performance obligations
    
(2,378,273
 )    
(1,083,261
 )    
(3,461,534
 )
Effect of exchange rate on deferred revenue
    
-
      
(21,121
 )    
(21,121
 )
Balance at September 30, 2019
   $
5,063,091
     $
1,059,407
     $
6,122,498
  
Less: non-current portion
    
-
      
(550,885
 )    
(550,885
 )
Current portion at September 30, 2019
   $
5,063,091
     $
508,522
     $
5,571,613