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STOCK-BASED COMPENSATION (Tables)
 3 Months Ended
Mar. 31, 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 March 31,

 

 

    

2017

    

2016

 

Cost of sales

 

$

36

 

$
8

 

Research and development expense

 

 

346

 

 
77

 

Selling, general and administrative expense

 

 

3,174

 

 
3,825

 

Total

 

$

3,556

 

$
3,910