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Note 5 - Inventories (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Inventory, Current [Table Text Block]
    December 31,
    2019   2018
Components, spare parts    
4,959
      
3,496
  
Work-in-progress    
584
      
576
  
Finished goods – own manufactured products    
1,737
      
2,672
  
Finished goods – distribution products    
1,981
      
1,442
  
Total gross inventories    
9,262
      
8,186
  
Less: allowance for slow-moving inventory and net realizable value    
(1,085
 )    
(974
 )
Total    
8,178
      
7,212