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NET INCOME (LOSS) PER COMMON SHARE (Tables)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2012
NET INCOME (LOSS) PER COMMON SHARE [Abstract]    
Basic and diluted net income (loss) per common share
The following table is a reconciliation of net income (loss) and the shares used in calculating basic and diluted net income (loss) per common share for the three months ended June 30, 2012 and 2011 (in thousands, except for share and per share data):

   
2012
  
2011
 
Numerator:
      
Net income - Basic
 $10,964  $3,313 
Effect of warrants
  -   (4,496)
    Net income (loss) - Diluted
 $10,964  $(1,183)
Denominator:
        
Weighted average common shares outstanding - Basic
  45,953,312   45,024,373 
Effect of dilutive shares:
        
Common stock equivalents arising from stock options, warrants and ESPP
  663,419   177,802 
Restricted stock awards and units
  240,578   - 
          
Weighted average common shares outstanding - Diluted
  46,857,309   45,201,175 
Net income (loss) per common share:
        
Basic
 $0.24  $0.07 
Diluted
 $0.23  $(0.03)
The following table is a reconciliation of net income (loss) and the shares used in calculating basic and diluted net income (loss) per common share for the six months ended June 30, 2012 and 2011 (in thousands, except for share and per share data):
 
   
2012
  
2011
 
Numerator:
      
Net income (loss) - Basic
 $9,743  $(8,568)
Effect of warrants
  -   - 
    Net income (loss) - Diluted
 $9,743  $(8,568)
Denominator:
        
Weighted average common shares outstanding - Basic
  45,871,166   41,977,113 
Effect of dilutive shares:
        
    Common stock equivalents arising from stock options, warrants and ESPP       726,359   - 
Restricted stock awards and units
  299,373   - 
          
Weighted average common shares outstanding - Diluted
  46,896,898   41,977,113 
Net income (loss) per common share:
        
Basic
 $0.21  $(0.20)
Diluted
 $0.21  $(0.20)