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Equity-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2014
Equity-Based Compensation  
Schedule of equity-based compensation expense

 

Equity-based compensation expense for the three and six months ended June 30, 2014 and 2013 consisted of the following (in thousands):

 

 

 

 

Three Months Ended June 30,

 

Six Months Ended June 30,

 

 

 

2014

 

2013

 

2014

 

2013

 

Cost of product sales

 

$
29 

 

$
35 

 

$
57 

 

$
58 

 

Research and development

 
359 

 
365 

 
808 

 
1,297 

 

Selling, general and administrative

 
1,889 

 
1,539 

 
3,342 

 
2,866 

 

Total equity-based compensation expense

 

$
2,277 

 

$
1,939 

 

$
4,207 

 

$
4,221