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Non-controlling interest (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of Non-controlling interest [Abstract]  
Schedule of Non-controlling Interest Changes

The table below shows the changes for the years ended December 31, 2019 and 2018:

 

  2 0 1 9   2 0 1 8
           
Balance at beginning of year $ (323,369)   $ (108,572)
Share of profits and losses for the year              (333,109)     (206,417)
Share of translation effects of foreign subsidiaries            (116,648)     (8,380)
Balance at the end of the year $ (773,126)   $ (323,369)