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Net Loss Per Share
 3 Months Ended
Mar. 31, 2015
Net Loss Per Share [Abstract]  
Net Loss Per Share

8.   Net Loss per Share

 

Basic net loss per common share for the three months ended March 31, 2015 and 2014 was computed by dividing the net loss for the relevant period by the weighted average number of shares of common stock outstanding. Diluted loss 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 approximately 2.3 million and 0.5 million outstanding stock options and 3.3 million and 0.5 million outstanding stock warrants under the treasury stock method, and 11,000 shares issuable upon conversion of preferred stock are excluded from the diluted earnings per share calculation for the three months ended March 31, 2015 and 2014, respectively, due to their anti-dilutive effect.

 

(in thousands, except per share amounts) Three months ended 
March 31,		 
  2015  2014 
BASIC AND DILUTED      
Weighted average number of common shares outstanding  40,455   37,941 
Net loss $(2,072) $(4,008)
         
Net loss per share - basic and diluted $(0.05) $(0.11)