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Note 4 - Revenue Recognition (Tables)
 9 Months Ended
Jun. 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 June 30, 2019
   $
-
  
   
Customer
deposits
    
Deferred
revenue
    
Total contract
liabilities
 
Balance at September 30, 2018
   $
199,596
     $
536,458
     $
736,054
  
New performance obligations
    
1,588,880
      
1,445,037
      
3,033,917
  
Recognition of revenue as a result of satisfying performance obligations
    
(870,521
 )    
(883,629
 )    
(1,754,150
 )
Effect of exchange rate on deferred revenue
    
-
      
(6,596
 )    
(6,596
 )
Balance at June 30, 2019
   $
917,955
     $
1,091,270
     $
2,009,225
  
Less: non-current portion
    
-
      
(600,756
 )    
(600,756
 )
Current portion at June 30, 2019
   $
917,955
     $
490,514
     $
1,408,469