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Accrued Expenses (Tables)
12 Months Ended
Dec. 31, 2020
Payables and Accruals [Abstract]  
Schedule of accrued expenses

Accrued expenses consist of the following:

 

    As of December 31,  
    2020     2019  
Accrued payroll and related expenses   $ 315     $ 237  
Other     169       143  
    $ 484     $ 380