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Note 13 - Leases (Tables)
 6 Months Ended
Mar. 31, 2021
Notes Tables  
Initial Measurement of Operating Lease [Table Text Block]
   
Operating ROU assets
  
Operating lease right of use asset at September 30, 2020
   $
5,285
  
Additional operating lease right of use assets
    
259
  
Less amortization of operating lease right-of-use assets
    
(343
 )
Effect of exchange rate on operating lease right of use assets
    
15
  
Operating lease right of use asset at March 31, 2021
   $
5,216
  
   
Operating lease liabilities
  
Operating lease liabilities at September 30, 2020
   $
7,166
  
Additional operating lease liabilities
    
259
  
Less lease principal payments on operating lease liabilities
    
(409
 )
Effect of exchange rate on operating lease liabilities
    
15
  
Operating lease liabilities at March 31, 2021
    
7,031
  
Less non-current portion
    
(6,172
 )
Current portion at March 31, 2021
   $
859
  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Fiscal year ending September 30, 2021 (remaining six months)
   $
569
  
2022
    
1,141
  
2023
    
1,090
  
2024
    
1,085
  
2025
    
1,162
  
Thereafter
    
3,104
  
Total undiscounted operating lease payments
    
8,151
  
Less imputed interest
    
(1,120
 )
Present value of operating lease liabilities
   $
7,031