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Accrued Expenses
12 Months Ended
Dec. 31, 2015
Accrued Expenses [Abstract]  
Accrued Expenses

5.   Accrued Expenses

 

Accrued expenses consist of the following (in thousands):

 

  As of December 31, 
  2015  2014 
       
Salaries, payroll taxes, vacation and benefits $932  $686 
Accrued consulting fees and other  382   249 
Total accrued expenses $1,314  $935