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Equity Compensation Plans (Tables)
 9 Months Ended
Sep. 30, 2015
Equity Compensation Plans [Abstract]  
Share-Based Compensation Expense Related to Employee Share-Based Compensation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Nine Months Ended

 

 

September 30,

 

September 30,

 

 

2015

 

2014

 

2015

 

2014

Cost of revenue

 

$
112 

 

$
86 

 

$
308 

 

$
250 

Research and development expenses

 

 
374 

 

 
276 

 

 
1,010 

 

 
675 

Selling, general and administrative expenses

 

 
1,906 

 

 
1,354 

 

 
5,215 

 

 
4,779 

Total share-based compensation expense related to

  employees

 

$
2,392 

 

$
1,716 

 

$
6,533 

 

$
5,704