Quarterly report pursuant to Section 13 or 15(d)

Stock Based Compensation (Tables)

v2.4.0.8
Stock Based Compensation (Tables)
6 Months Ended
Jun. 30, 2014
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, 2014 and 2013:

   
Three months ended
June 30,
   
Six months ended
June 30,
 
   
2014
   
2013
   
2014
   
2013
 
Research and development
  $ 18,000     $ 10,000     $ 95,000     $ 19,000  
Selling, general and administrative
    174,000       241,000       892,000       309,000  
            Stock-based compensation expense included in operating expense
  $ 192,000     $ 251,000     $ 987,000     $ 328,000  

Valuation assumptions
Our weighted average Black-Scholes fair value assumptions used to value the grants in the first six months of 2014 are as follows:
 
       
   
6/30/14
 
Expected life(b)
 
5.5 yrs
 
Risk free interest rate
    1.65 %
Expected volatility(a)
    102 %
Expected dividend yield
    0.0 %
         
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(a)
Reflects movements in our stock price over the most recent historical period equivalent to the expected life.
(b)
Based on the simplified method.