Stock-Based Compensation (Tables)

3 Months Ended

Oct. 31, 2011

Stock-Based Compensation [Abstract]

Stock-based compensation for awards detailing where recorded in Condensed Consolidated Statement of Operations

	Three months ended October 31,
	2011	2010
Cost of sales	$          53,000	122,000
Selling, general and administrative expenses	645,000	1,098,000
Research and development expenses	175,000	288,000
Stock-based compensation expense before income tax benefit	873,000	1,508,000
Income tax benefit	(306,000)	(542,000)
Net stock-based compensation expense	$        567,000	966,000

Certain weighted average assumptions used to estimate initial fair value of stock-based awards

	Three months ended October 31,
	2011	2010
Expected dividend yield	4.04%	3.66%
Expected volatility	36.00%	38.00%
Risk-free interest rate	0.88%	1.27%
Expected life (years)	5.42	5.18

Actual income tax benefit recognized for tax deductions relating to the exercise of stock-based awards

	Three months ended October 31,
	2011	2010
Actual income tax benefit recorded for the tax deductions relating to the exercise of stock-based awards	$        120,000	25,000
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	(99,000)	(28,000)
Excess income tax benefit (shortfall) recorded as an increase (decrease) to additional paid-in capital	21,000	(3,000)
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 (shortfall) 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	(3,000)