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Deferred revenue (Tables)
 12 Months Ended
Dec. 31, 2022
Deferred Revenue  
Schedule of deferred revenue
               
   Note   12.31.22   12.31.21 
Non-current            
Nonrefundable customer contributions        1,875    3,287 
Investment plan   2.c    1,802    —   
Total Non-current        3,677    3,287 
                
Current               
Nonrefundable customer contributions        44    86