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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2018
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of prepaid expenses and other current assets
   December 31, 
   2018   2017 
Government institutions  $167   $191 
Prepaid expenses   155    342 
Advances to vendors   371    634 
Other assets       458 
           
   $693   $1,625