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Note 5 - Revenue Recognition (Tables)
 3 Months Ended
Dec. 31, 2020
Notes Tables  
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
   
Customer
deposits
    
Deferred
revenue
    
Total
contract
liabilities
 
Balance at September 30, 2020
   $
3,683
     $
1,024
     $
4,707
  
New performance obligations
    
3,476
      
245
      
3,721
  
Recognition of revenue as a result of satisfying performance obligations
    
(2,221
 )    
(439
 )    
(2,660
 )
Effect of exchange rate on deferred revenue
    
-
      
21
      
21
  
Balance at December 31, 2020
   $
4,938
     $
851
     $
5,789
  
Less: non-current portion
    
-
      
(275
 )    
(275
 )
Current portion at December 31, 2020
   $
4,938
     $
576
     $
5,514