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Prepaid Expenses and Other Current Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Prepaid Expenses and Other Current Assets [Abstract]  
Schedule of prepaid expense and other current assets
    As of December 31,  
    2021     2020  
             
Prepaid insurance   $ 189     $ 255  
Prepaid rent     6       11  
VAT receivable     345       433  
Advances     3       216  
Advances to suppliers     38       43  
Other     255       203  
Total prepaid expenses and other current assets   $ 836     $ 1,161