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Note 5 - Net Income per Share
6 Months Ended
Jun. 30, 2012
Earnings Per Share [Text Block]
5. Net Income per Share — Basic net income per share excludes dilution and is computed by dividing net income by the weighted average number of common shares outstanding for the period. Diluted net income per share is calculated using the treasury stock method and reflects the potential dilution that would occur if outstanding securities or other contracts to issue common stock were exercised or converted into common stock.  For the three and six months ended June 30, 2012 and 2011, the Company had securities outstanding, which could potentially dilute basic net income per share in the future, but were excluded from the computation of diluted net income per share in the periods presented, as their effect would have been anti-dilutive. The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share amounts):

   
Three months ended June 30,
   
Six months ended June 30,
 
   
2012
   
2011
   
2012
   
2011
 
Numerator:
                       
Net income
  $ 6,592     $ 3,482     $ 9,587     $ 5,375  
                                 
Denominator:
                               
Weighted average oustanding shares used to compute basic net income per share
    34,665       33,846       34,385       34,432  
Effect of dilutive securities
    1,332       1,057       1,275       1,166  
Weighted average oustanding shares used to compute diluted net income per share
    35,997       34,903       35,660       35,598  
                                 
Net income per share - basic
  $ 0.19     $ 0.10     $ 0.28     $ 0.16  
Net income per share - diluted
  $ 0.18     $ 0.10     $ 0.27     $ 0.15  

For the three months ended June 30, 2012 and 2011, approximately 1.3 million and 4.1 million weighted common stock equivalents, respectively, were excluded from the calculation of diluted net income per share because their inclusion would have been anti-dilutive. For the six months ended June 30, 2012 and 2011, approximately 1.7 million and 4.3 million weighted common stock equivalents, respectively, were excluded from the calculation of diluted net income per share because their inclusion would have been anti-dilutive.