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Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2017
Prepaid Expenses and Other Current Assets [Abstract]  
Schedule of prepaid expense and other current assets

  As of December 31, 
  2017  2016 
       
Prepaid insurance $136  $125 
Prepaid rent  68   46 
VAT receivable  336   247 
Prepaid inventory  494   715 
Advances to suppliers  545   596 
Other  257   220 
Total prepaid expenses and other current assets $1,836  $1,949