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Stock-Based Compensation (Tables)
3 Months Ended
Oct. 31, 2012
Share-based Compensation [Abstract]  
Stock-based compensation for awards detailing where recorded in Condensed Consolidated Statement of Operations
 
 
Three months ended October 31,
 
 
2012
 
2011
Cost of sales
 
$
45,000

 
53,000

Selling, general and administrative expenses
 
601,000

 
645,000

Research and development expenses
 
99,000

 
175,000

Stock-based compensation expense before income tax benefit
 
745,000

 
873,000

Income tax benefit
 
(264,000
)
 
(306,000
)
Net stock-based compensation expense
 
$
481,000

 
567,000

Summary of stock-based compensation expense before income tax benefit by award type
 
 
Three months ended October 31,
 
 
2012
 
2011
Stock options
 
$
573,000

 
792,000

ESPP
 
53,000

 
61,000

RSUs with performance measures
 
86,000

 

RSUs without performance measures
 
32,000

 

Stock units
 
6,000

 

SARs
 
(5,000
)
 
20,000

Stock-based compensation expense before income tax benefit
 
$
745,000

 
873,000

Certain weighted average assumptions used to estimate the fair value of stock-based awards
Expected dividend yield
 
4.04
%
Expected volatility
 
36.00
%
Risk-free interest rate
 
0.88
%
Expected life (years)
 
5.42

Components of actual Income tax benefit recognized for tax deductions relating to exercise of stock-based awards table text block
 
 
Three months ended October 31,
 
 
2012
 
2011
Actual income tax benefit recorded for the tax deductions relating to the exercise of stock-based awards
 
$
1,000

 
120,000

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
 
(1,000
)
 
(99,000
)
Excess income tax benefit recorded as an increase to additional paid-in capital
 

 
21,000

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