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Stock Option and Incentive Plans (Tables)
 6 Months Ended
Jun. 30, 2016
Stock Option and Incentive Plans  
Schedule of total compensation cost recognized for all stock option awards in the statements of operations

Total compensation cost recognized for all stock option awards in the statements of operations is as follows (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Three Months Ended

 

Six Months Ended

 

 

 

June 30,

 

June 30,

 

 

 

2016

 

2015

 

2016

 

2015

 

Research and development

    

$
213

    

$
131

    

$
446

    

$
257

 

General and administrative

 

 
525

 

 
257

 

 
1,030

 

 
514

 

Total stock-based compensation expense

 

$
738

 

$
388

 

$
1,476

 

$
771