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Cash and Cash Equivalents (Tables)
12 Months Ended
Dec. 31, 2019
Cash and cash equivalents [abstract]  
Schedule of cash and cash equivalents
   As of December 31 
   2019   2018 
   USD thousands 
     
Balance in USD   4,279    4,410 
Balance in other currencies   106    753 
Total cash and cash equivalents   4,385    5,163