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Restructuring Obligations and Other Charges (Tables)
 12 Months Ended
Dec. 31, 2014
Restructuring Obligations and Other Charges [Abstract]  
Restructuring Obligations
The following table summarizes activity associated with the restructuring obligation (see also Note 7) and related expenses incurred for the years ended December 31, 2014 and 2013 (in thousands):
 
  
Severance(1)
  
Total
 
Restructuring obligations, December 31, 2012
 
$
—
  
$
—
 
Restructuring costs incurred (fourth quarter of 2013)
  
431
   
431
 
Cash payments                                                              
  
—
   
—
 
Restructuring obligations, December 31, 2013
 
$
431
  
$
431
 
Restructuring costs incurred                                                                                    
  
—
   
—
 
Cash payments                                                                                    
  
(431
)
  
(431
)
Restructuring obligations, December 31, 2014
 
$
—
  
$
—
 

(1)
Severance costs include those expenses related to severance pay and related employee benefit obligations.