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Prepaid Expenses and Other Receivables (Tables)
 12 Months Ended
Dec. 31, 2020
Prepaid Expenses And Other Receivables [Abstract]  
Schedule of prepaid expenses and other receivables
   December 31, 
   2020   2019 
         
Government authorities  $283   $177 
Prepaid expenses   1,888    180 
Lease deposits   24    18 
Others   139    42 
           
   $2,334   $417