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Note 9 - Trade Accounts and Notes Payable (Tables)
12 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
    December 31,
    2018   2017
Trade accounts payable    
6,286
     
6,220
 
Notes payable    
11
     
90
 
Total    
6,297
     
6,310