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STOCK-BASED COMPENSATION
 6 Months Ended
Jun. 30, 2016
STOCK-BASED COMPENSATION  
STOCK-BASED COMPENSATION

NOTE 5.  STOCK-BASED COMPENSATION

 

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,

 

 

    

2016

    

2015

    

2016

    

2015

 

Cost of sales

 

$
8

 

$
4

 

$
16

 

$
5

 

Research and development expense

 

 
131

 

 
46

 

 
208

 

 
183

 

Selling, general and administrative expense

 

 
4,189

 

 
3,203

 

 
8,014

 

 
5,878

 

Total

 

$
4,328

 

$
3,253

 

$
8,238

 

$
6,066

 

 

At June 30, 2016, the Company had $28.3 million of total unrecognized compensation expense, net of estimated forfeitures, related to stock option grants and restricted stock units that will be recognized over an average vesting period of 2.2 years.