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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2016
STOCK-BASED COMPENSATION  
Schedule of stock-based compensation expense recognized for stock options, stock awards, restricted stock units and the Company's employee stock purchase program (ESPP)

The following table presents stock-based compensation expense recognized for stock options, stock awards, restricted stock units and the Company’s employee stock purchase program (ESPP) in the Company’s Condensed Consolidated Statements of Operations (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended September 30,

 

Nine Months Ended September 30,

 

 

    

2016

    

2015

    

2016

    

2015

 

Cost of sales

 

$
11

 

$
4

 

$
27

 

$
9

 

Research and development expense

 

 
121

 

 
37

 

 
329

 

 
219

 

Selling, general and administrative expense

 

 
4,232

 

 
3,590

 

 
12,246

 

 
9,469

 

Total

 

$
4,364

 

$
3,631

 

$
12,602

 

$
9,697