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Note 9 - Prepaid Expenses and Other (Tables)
12 Months Ended
Sep. 30, 2018
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   
September 30,
 
   
2018
   
2017
 
Deposits for inventory
  $
1,366,069
    $
29,804
 
Leashold improvement receivable
   
1,132,017
     
-
 
Prepaid insurance
   
162,822
     
91,542
 
Prepaid maintenance agreement
   
93,750
     
187,500
 
Receivable for stock options exercised
   
-
     
252,043
 
Dues and subscriptions
   
92,097
     
247,163
 
Other
   
244,646
     
175,270
 
    $
3,091,401
    $
983,322