Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Tables)

v2.4.0.6
Stock Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2012
Stock Based Compensation [Abstract]  
Summarization of stock-based compensation
The following table summarizes stock-based compensation for the three and six months ended June 30, 2012 and 2011:
 
   
Three months ended
June 30,
    
Six months ended
June 30,
  
   
2012
    
2011
    
2012
    
2011
  
Research and development
   $ 33,000     $ 92,000     $ 74,000     $ 179,000  
Selling, general and administrative
     75,000       150,000       148,000       244,000  
Stock-based compensation expense included in operating expense
   $ 108,000     $ 242,000     $ 222,000     $ 423,000  

Weighted average Black-Scholes fair value assumptions used to value grants
Our weighted average Black-Scholes fair value assumptions used to value the 2012 and 2011 first six months grants are as follows:

 
 
6/30/12
 
 
6/30/11
 
Expected life(b)
 
5.5 yrs
 
 
6.04 yrs
 
Risk free interest rate
 
 
0.6
 %
 
 
2.0
 %
Expected volatility(a)
 
 
96
 %
 
 
119
 %
Expected dividend yield
 
 
0.0
 %
 
 
0.0
 %
 
(a)
Reflects movements in our stock price over the most recent historical period equivalent to the expected life.
(b)
Based on the simplified method.