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14. Financial assets at amortized cost (Tables)
 12 Months Ended
Dec. 31, 2018
Financial Assets At Amortized Cost Tables Abstract  
Financial assets at amortized cost
       12.31.18     12.31.17 
Non-current          
Current          
Government bonds                                  -                       16,978

Time deposits		                    1,208,770                                -
Total Current                     1,208,770                       16,978