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STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2014
STOCK-BASED COMPENSATION  
Schedule of stock-based compensation expense recognized for stock options, stock awards, restricted stock units and the Company's condensed consolidated 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 June 30,

 

Six Months Ended June 30,

 

 

 

2014

 

2013

 

2014

 

2013

 

 

 

 

 

 

 

 

 

 

 

Cost of sales

 

$

1

 

$

11

 

$

13

 

$

21

 

Research and development expense

 

51

 

89

 

104

 

199

 

Selling, general and administrative expense

 

2,247

 

1,462

 

4,053

 

2,753

 

Total

 

$

2,299

 

$

1,562

 

$

4,170

 

$

2,973