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Marketing and Sales (Tables)
12 Months Ended
Dec. 31, 2020
Marketing And Sales Disclosure [Abstract]  
Schedule of marketing and sales
   Year ended 
   December 31, 
   2020   2019   2018 
   USD in thousands 
             
Payroll and related expenses (*)   833    870    489 
Exhibitions, conventions and travel expenses   175    172    189 
Consultants   178    212    249 
Other   82    96    60 
    1,268    1,350    987