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STOCK-BASED COMPENSATION (Tables)
 9 Months Ended
Sep. 30, 2017
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,

 

 

    

2017

    

2016

    

2017

    

2016

 

Cost of sales

 

$

 9

 

$
11

 

$

84

 

$
27

 

Research and development expense

 

 

45

 

 
121

 

 

652

 

 
329

 

Selling, general and administrative expense

 

 

2,857

 

 
4,232

 

 

9,134

 

 
12,246

 

Restructuring charges

 

 

52

 

 

 —

 

 

52

 

 

 —

 

Total

 

$

2,963

 

$
4,364

 

$

9,922

 

$
12,602