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Stock-Based Compensation (Tables)
6 Months Ended
Jan. 31, 2013
Share-based Compensation [Abstract]  
Stock-based compensation for awards detailing where recorded in Statement of Operations
 
 
Three months ended January 31,
 
Six months ended January 31,
 
 
2013
 
2012
 
2013
 
2012
Cost of sales
 
$
74,000

 
125,000

 
119,000

 
178,000

Selling, general and administrative expenses
 
614,000

 
795,000

 
1,215,000

 
1,440,000

Research and development expenses
 
118,000

 
116,000

 
217,000

 
291,000

Stock-based compensation expense before income tax benefit
 
806,000

 
1,036,000

 
1,551,000

 
1,909,000

Income tax benefit
 
(346,000
)
 
(394,000
)
 
(610,000
)
 
(701,000
)
Net stock-based compensation expense
 
$
460,000

 
642,000

 
941,000

 
1,208,000

Summary of stock-based compensation expense before income tax benefit by award type
 
 
Three months ended January 31,
 
Six months ended January 31,
 
 
2013
 
2012
 
2013
 
2012
Stock options
 
$
638,000

 
991,000

 
1,211,000

 
1,783,000

ESPP
 
48,000

 
59,000

 
101,000

 
120,000

RSUs with performance measures
 
86,000

 

 
172,000

 

RSUs without performance measures
 
28,000

 

 
60,000

 

Stock units
 
6,000

 

 
12,000

 

SARs
 

 
(14,000
)
 
(5,000
)
 
6,000

Stock-based compensation expense before income tax benefit
 
$
806,000

 
1,036,000

 
1,551,000

 
1,909,000

Certain weighted average assumptions used to estimate the fair value of stock-based awards
 
 
Three months ended January 31,
 
Six months ended January 31,
 
 
2013
 
2012
 
2013
 
2012
Expected dividend yield
 
4.29
%
 
3.68
%
 
4.29
%
 
4.00
%
Expected volatility
 
37.00
%
 
37.70
%
 
37.00
%
 
36.20
%
Risk-free interest rate
 
0.61
%
 
0.42
%
 
0.61
%
 
0.83
%
Expected life (years)
 
5.31

 
3.81

 
5.31

 
5.24

Components of actual Income tax benefit recognized for tax deductions relating to exercise of stock-based awards
 
 
Six months ended January 31,
 
 
2013
 
2012
Actual income tax benefit recorded for the tax deductions relating to the exercise of stock-based awards
 
$
79,000

 
235,000

Less: Tax benefit initially recognized on exercised stock-based awards vesting subsequent to the adoption of accounting standards that require us to expense stock-based awards, excluding income tax shortfalls
 
60,000

 
151,000

Excess income tax benefit recorded as an increase to additional paid-in capital
 
19,000

 
84,000

Less: Tax benefit initially disclosed but not previously recognized on exercised equity-classified stock-based awards vesting prior to the adoption of accounting standards that require us to expense stock-based awards
 

 
2,000

Excess income tax benefit from exercised equity-classified stock-based awards reported as a cash flow from financing activities in our Condensed Consolidated Statements of Cash Flows
 
$
19,000

 
82,000