XML 31 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock-Based Compensation (Tables)
 12 Months Ended
Apr. 30, 2014
Stock-Based Compensation  
Schedule of weighted average assumptions used to estimate fair value of stock options granted

  Year Ended April 30,  
 
   2014   2013   2012  

Expected term (in years)

     6.08     6.00     5.46  

Expected volatility

     45.61 %   45.94 %   26.75 %

Risk-free interest rate

     1.64 %   0.92 %   1.40 %

Expected dividend

     —     —     —  

Weighted average fair value at grant date

   $ 10.61   $ 8.44   $ 8.01  
Schedule of stock option plans

  Restated 2006 Plan   2002 Plan   1992 Plan  
 
   Shares   Weighted
Average
Exercise
Price		   Shares   Weighted
Average
Exercise
Price		   Shares   Weighted
Average
Exercise
Price		  

Outstanding at April 30, 2011

     535,410   $ 23.51     368,059   $ 2.81     319,573   $ 0.49  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Options granted

     175,000     29.28     —     —     —     —  

Options exercised

     (18,200 )   21.88     (43,073 )   2.91     (80,263 )   0.51  

Options canceled

     —     —     —     —     —     —  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Outstanding at April 30, 2012

     692,210     25.01     324,986     2.80     239,310     0.49  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Options granted

     203,000     19.07     —     —     —     —  

Options exercised

     (3,000 )   20.75     (147,597 )   1.39     (57,741 )   0.38  

Options canceled

     —     —     —     —     —     —  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Outstanding at April 30, 2013

     892,210     23.67     177,389     3.98     181,569     0.52  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Options granted

     125,000     23.39     —     —     —     —  

Options exercised

     (261,900 )   24.45     (121,841 )   2.25     (76,490 )   0.42  

Options canceled

     (42,200 )   26.05     (7,037 )   11.79     —     —  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Outstanding at April 30, 2014

     713,110     23.20     48,511     7.18     105,079     0.59  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​

Options exercisable at April 30, 2014

     301,910   $ 23.10     48,511   $ 7.18     105,079   $ 0.59  
                           
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
                           
Schedule of the status of the Company's non-vested stock options

A summary of the status of the Company's non-vested stock options as of April 30, 2014 and the year then ended is as follows:

Non-vested Options
  Options   Weighted
Average
Grant Date
Fair Value		  

Non-vested at April 30, 2013

     434,900   $ 7.91  

Granted

     125,000     10.61  

Expired

     —     —  

Canceled

     (28,800 )   8.64  

Vested

     (119,900 )   7.66  
           
​ ​ ​ ​ ​ ​ ​ ​

Non-vested at April 30, 2014

     411,200   $ 8.75  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of information concerning outstanding and exercisable options

The following tabulation summarizes certain information concerning outstanding and exercisable options at April 30, 2014:

 
   Options Outstanding    
    
  
 
    
   Weighted
Average
Remaining
Contractual
Life In
Years		    
   Options Exercisable  
Range of Exercise Prices   As of
April 30,
2014		   Weighted
Average
Exercise
Price		   As of
April 30,
2014		   Weighted
Average
Exercise
Price		  
$            0.59     105,079     5.37   $ 0.59     105,079   $ 0.59  
              2.13     23,176     1.47     2.13     23,176     2.13  
            11.79     25,335     2.40     11.79     25,335     11.79  
  18.07-24.65     483,710     6.40     20.67     242,510     21.62  
  25.77-32.19     229,400     7.69     28.54     59,400     29.13  
                       
$  0.59-32.19     866,700     6.37   $ 19.56     455,500   $ 16.21  
                       
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​
                       
Schedule of Company's restricted stock awards

  Information related to the Company's restricted stock awards at April 30, 2014 and for the year then ended is as follows:

 
   Restated 2006 Plan  
 
   Shares   Weighted
Average
Grant Date
Fair Value		  

Unvested stock at April 30, 2013

     383,237   $ 23.32  

Stock granted

     128,500     24.48  

Stock vested

     (82,955 )   26.16  

Stock canceled

     (35,869 )   24.20  
           
​ ​ ​ ​ ​ ​ ​ ​

Unvested stock at April 30, 2014

     392,913   $ 23.02  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​
           
Schedule of Company's restricted stock units

Information related to the Company's restricted stock units at April 30, 2014 and for the year then ended is as follows:

 
   Restated 2006 Plan  
 
   Shares   Weighted
Average
Grant Date
Fair Value		  

Unvested restricted stock units at April 30, 2013

     14,926   $ 24.28  

Restricted stock units granted

     —     —  

Restricted stock units vested

     (14,251 )   24.28  

Restricted stock units canceled

     (675 )   24.28  
           
​ ​ ​ ​ ​ ​ ​ ​

Unvested restricted stock units at April 30, 2014

     —   $ —  
           
​ ​ ​ ​ ​ ​ ​ ​
​ ​ ​ ​ ​ ​ ​ ​