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Note 4 - Other Receivables (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Other Receivables [Table Text Block]
    December 31,
    2019   2018
Research and development tax credit receivable from the French State    
766
     
685
 
Value-added taxes receivable    
422
     
390
 
Other receivables from Government and public authorities    
26
     
233
 
Others    
46
     
126
 
Total    
1,259
     
1,434