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Other Accounts Receivable and Prepaid Expenses (Tables)
12 Months Ended
Dec. 31, 2021
Receivables [Abstract]  
Schedule of other accounts receivable and prepaid expenses
   December 31 
   2021   2020 
         
Government authorities  $144   $26 
Advances to suppliers   384    580 
Prepaid expenses   366    488 
Accrued income   1    146 
Other   82    71 
           
   $977   $1,311