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Accrued Compensation and Related Expenses (Tables)
12 Months Ended
Dec. 31, 2018
Compensation Related Costs [Abstract]  
Schedule of accrued compensation and related expenses
  December 31,  
    2018     2017  
Accrued payroll and related taxes   $ 123     $ 453  
Accrued vacation     22       14  
Total accrued compensation and related expense   $ 145     $ 467