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Ordinary share (Tables)
12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Shares outstanding
    2020     2019  
             
   Shares issued     3,260,559       3,260,559  
   Less: shares under treasury stock     (167,700 )     (167,700 )
                 
      3,092,859       3,092,859