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28 Deferred revenue
12 Months Ended
Dec. 31, 2020
Disclosure deferred revenue [abstract]  
Deferred revenue
Note 28 | Deferred revenue

 

     12.31.20     12.31.19 
Non-current        
Nonrefundable customer contributions    1,471    368
Total Non-current    1,471    368
         
     12.31.20     12.31.19 
Current        
Nonrefundable customer contributions    37    7
Total Current    37    7