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Note 4 - Net Income Per Common Share
6 Months Ended
Jun. 30, 2018
Notes to Financial Statements  
Earnings Per Share [Text Block]
Note
4
– Net Income per Common Share
 
Basic net income per share is computed based on the weighted-average number of common shares outstanding. Diluted net income per share is computed based on the weighted-average number of common shares outstanding, increased by the number of additional shares that would have been outstanding had potentially dilutive common shares been issued and reduced by the number of shares the Company could have repurchased from the proceeds from issuance of the potentially dilutive shares. Potentially dilutive shares of common stock include stock options, restricted stock units and restricted stock awards granted under stock-based compensation plans and shares committed to be purchased under the employee stock purchase plan. Performance stock units are excluded from the calculation of dilutive potential common shares until the performance conditions have been satisfied.
 
The table below sets forth the computation of basic and diluted net income per share:
 
             
   
Three Months Ended
   
Six Months Ended
 
   
June 30,
   
June 30,
 
(in thousands, except share and per share amounts)
 
2018
   
2017
   
2018
   
2017
 
Net income
  $
18,314
    $
12,086
    $
36,365
    $
24,286
 
                                 
Basic - weighted-average shares outstanding:
   
26,972,990
     
26,541,978
     
26,925,673
     
26,554,262
 
Effect of dilutive securities:
                               
Employee stock options and other
   
301,892
     
107,174
     
306,542
     
155,955
 
Diluted - weighted-average shares outstanding:
   
27,274,882
     
26,649,152
     
27,232,215
     
26,710,217
 
Net income per share:
                               
Basic
  $
0.68
    $
0.46
    $
1.35
    $
0.91
 
Diluted
  $
0.67
    $
0.45
    $
1.34
    $
0.91