XML 51 R8.htm IDEA: XBRL DOCUMENT  v2.3.0.11
NET INCOME PER SHARE
 6 Months Ended
Jun. 30, 2011
NET INCOME PER SHARE
3. NET INCOME PER SHARE
     Basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted net income per share is computed by dividing net income by the weighted average number of common shares outstanding and potentially dilutive securities outstanding during the period under the treasury stock method. Potentially dilutive securities include stock options, restricted stock units, shares to be purchased under the employee stock purchase plan, and warrants. Under the treasury stock method, dilutive securities are assumed to be exercised at the beginning of the periods and as if funds obtained thereby were used to purchase common stock at the average market price during the period. Securities are excluded from the computations of diluted net income per share if their effect would be antidilutive to earnings per share.
     The following table reconciles the weighted average shares outstanding for basic and diluted net income per share for the periods indicated.
                                 
    Three Months     Three Months     Six Months     Six Months  
    Ended June 30,     Ended June 30,     Ended June 30,     Ended June 30,  
    2011     2010     2011     2010  
Net income
   $ 5,186     $ 1,298     $ 8,437     $ 1,575  
 
                                
Weighted average shares used in computing basic net income per share
     34,917       34,106       34,798       34,061  
 
                        
 
                                
Net income per share — basic
   $ 0.15     $ 0.04     $ 0.24     $ 0.05  
 
                        
 
                                
Net income
   $ 5,186     $ 1,298     $ 8,437     $ 1,575  
 
                                
Weighted average shares used in computing basic net income per share
     34,917       34,106       34,798       34,061  
Effect of dilutive securities
     856       1,072       917       1,129  
 
                        
Weighted average shares used in computing diluted net income per share
     35,773       35,178       35,715       35,190  
 
                        
 
                                
Net income per share — diluted
   $ 0.14     $ 0.04     $ 0.24     $ 0.04  
 
                        
     The computation of diluted net income per share does not include 1,412 and 1,161 options and restricted stock units for the three and six months ended June 30, 2011, respectively, because their inclusion would have an antidilutive effect on net income per share. The computation of diluted net income per share does not include 2,927 options for the three and six months ended June 30, 2010, because their inclusion would have an antidilutive effect on net income per share.