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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2014
Fair Value Measurements [Abstract]  
Assets and Liabilities Measured at Fair Value
The following table provides a summary of the recognized assets and liabilities that we measure at fair value on a recurring basis:
 
  
Balance as of
  
Basis of Fair Value Measurements
 
  
September 30, 2014
  
Level 1
  
Level 2
  
Level 3
 
Assets:
        
Cash equivalents
 
$
3,644,000
  
$
3,644,000
  
$
  
$
 
                 
Liabilities:
                
Warrant liability
 
$
287,000
  
$
  
$
  
$
287,000
 

  
Balance as of
  
Basis of Fair Value Measurements
 
  
December 31, 2013
  
Level 1
  
Level 2
  
Level 3
 
Assets:
        
Cash equivalents
 
$
4,644,000
  
$
4,644,000
  
$
  
$
 
Change in Level 3 Warrant Liability Value
The following table summarizes the change in our Level 3 warrant liability value:

  
Three months ended
  
Nine months ended
 
Warrant liability
 
September 30, 2014
  
September 30, 2014
 
     
Beginning balance
 
$
  
$
 
Fair value of warrants allocated from additional paid in capital
  
421,000
   
421,000
 
Decrease in fair value recognized in operating expenses
  
(134,000
)
  
(134,000
)
Ending balance
 
$
287,000
  
$
287,000