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Note 13 - Leases (Tables)
 3 Months Ended
Dec. 31, 2020
Notes Tables  
Initial Measurement of Operating Lease [Table Text Block]
   
Operating ROU
assets
 
Operating lease ROU asset at September 30, 2020
   $
5,285
  
Additional operating lease ROU assets
    
248
  
Less amortization of operating lease ROU assets
    
(170
 )
Effect of exchange rate on operating lease ROU assets
    
21
  
Operating lease ROU asset at December 31, 2020
   $
5,384
  
   
Operating lease
liabilities
 
Operating lease liabilities at September 30, 2020
   $
7,166
  
Additional operating lease liabilities
    
248
  
Less lease principal payments on operating lease liabilities
    
(202
 )
Effect of exchange rate on operating lease liabilities
    
21
  
Operating lease liabilities at December 31, 2020
    
7,233
  
Less non-current portion
    
(6,385
 )
Current portion at December 31, 2020
   $
848
  
Lessee, Operating Lease, Liability, Maturity [Table Text Block]
Fiscal year ending September 30,
        
2021 (remaining nine months)
   $
840
  
2022
    
1,146
  
2023
    
1,090
  
2024
    
1,085
  
2025
    
1,162
  
Thereafter
    
3,104
  
Total undiscounted operating lease payments
    
8,427
  
Less imputed interest
    
(1,194
 )
Present value of operating lease liabilities
    
7,233
  
Less lease liability, noncurrent
    
(6,385
 )
Lease liability, current portion
   $
848