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Severance and Other Charges (Tables)
 6 Months Ended
Jun. 30, 2016
Restructuring and Related Activities [Abstract]  
Summary of Activity Related to Accrued Severance Charges

A summary of the activity related to the accrued severance charges is as follows (in thousands):

 

Balance as of December 31, 2015

    $ 195  

Payments

      (158 ) 
  

 

 

  

Balance as of March 31, 2016

      37  

Payments

      (37 ) 
  

 

 

  

Balance as of June 30, 2016

    $ —