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Note 10 - Trade Accounts and Notes Payable (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
    December 31,
    2019   2018
Trade accounts payable    
6,034
     
6,286
 
Notes payable    
12
     
11
 
Total    
6,046
     
6,297