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Note 9 - Prepaid Expenses and Other (Tables)
12 Months Ended
Sep. 30, 2020
Notes Tables  
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block]
   
September 30,
 
   
2020
   
2019
 
Deposits for inventory
  $
54
    $
1,065
 
Prepaid insurance
   
264
     
194
 
Foreign currency forward contract asset
   
5,205
     
-
 
Prepaid rent
   
-
     
88
 
Dues and subscriptions
   
151
     
88
 
Trade shows and travel
   
103
     
107
 
Other
   
288
     
240
 
    $
6,065
    $
1,782