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Net Loss Per Share
 9 Months Ended
Sep. 30, 2013
Net Loss Per Share [Abstract]  
Net Loss Per Share
8. Net Loss Per Share
 
Basic net loss per common share for the three and nine months ended September 30, 2013 and 2012 was computed by dividing the net loss for the relevant period by the weighted average number of shares of common stock outstanding. Diluted earnings per common share is computed by dividing net loss by the weighted average number of shares of common stock and common stock equivalents outstanding.
 
Potential common stock equivalents of 413,000 and 103,000 stock options outstanding under the treasury stock method, 0.5 million and 3.2 million outstanding stock warrants under the treasury stock method and 11,000 and 52,000 shares issuable upon conversion of preferred stock are excluded from the diluted earnings per share calculation for the nine months ended September 30, 2013 and 2012, respectively, due to their anti-dilutive effect.
   
Three Months ended
  
(in thousands, except per share amounts)
  
September 30,
  
   
2013
    
2012
  
BASIC AND DILUTED
            
Weighted average number of common shares outstanding
    
35,437
      
33,021
  
Number of shares for computation of net loss per share
    
35,437
      
33,021
  
Net loss
  
$
(3,343
)
  
$
(2,144
)
                 
Net loss per share - basic and diluted
  
$
(0.09
)
  
$
(0.06
)
 
   
Nine Months ended
  
(in thousands, except per share amounts)
  
September 30,
  
   
2013
    
2012
  
BASIC AND DILUTED
            
Weighted average number of common shares outstanding
    
34,366
      
32,934
  
Number of shares for computation of net loss per share
    
34,366
      
32,934
  
Net loss
  
$
(10,033
)
  
$
(7,159
)
                 
Net loss per share - basic and diluted
  
$
(0.29
)
  
$
(0.22
)