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Stock-Based Compensation (Tables)
 12 Months Ended
Sep. 30, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Stock-Based Compensation Expense
Stock-based compensation expense is included in the consolidated results of operations as follows (in thousands):
 
Fiscal years ended September 30,
 
2012
 
2011
 
2010
Cost of sales
$
166

 
$
136

 
$
149

Sales and marketing
1,271

 
1,156

 
1,185

Research and development
724

 
771

 
739

General and administrative
1,566

 
1,381

 
1,298

Stock-based compensation before income taxes
3,727

 
3,444

 
3,371

Income tax benefit
(1,240
)
 
(1,143
)
 
(1,121
)
Stock-based compensation after income taxes
$
2,487

 
$
2,301

 
$
2,250
Schedule of Options and Common Shares Reserved for Grant
A summary of options and common shares reserved for grant under the Plans and Assumed Plans are as follows (in thousands, except per common share amounts):
 
Options Available for Grant
 
Options Outstanding
 
Weighted Average Exercised Price
 
Weighted Average Contractual Term (in years)
 
Aggregate Intrinsic Value (1)
Balance at September 30, 2011
2,517

 
5,183

 
$10.70
 
 
 
 
Granted
(917
)
 
917

 
10.65
 
 
 
 
Exercised
—

 
(168
)
 
6.37
 
 
 
 
Cancelled
178

 
(178
)
 
12.44
 
 
 
 
Balance at September 30, 2012
1,778

 
5,754

 
$10.76
 
6.2
 
$
3,623

 
 
 
 
 
 
 
 
 
 
Exercisable at September 30, 2012
 
 
3,998

 
$11.03
 
5.1
 
$
2,854

(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $10.16 as of September 30, 2012, which would have been received by the option holders had all option holders exercised their options as of that date.
Schedule of Valuation Assumptions
The table below shows the weighted average fair value, which was determined based upon the fair value of each option on the grant date utilizing the Black-Scholes option-pricing model and the related assumptions:
 
Fiscal years ended September 30,
 
2012
 
2011
 
2010
Fair value of options granted (in thousands)
$
4,086

 
$
4,948

 
$
3,445

Weighted average per option grant date fair value
$
4.45

 
$
4.14

 
$
3.39

Assumptions used for option grants:
 
 
 
 
 
Risk free interest rate
0.84% - 1.33%
 
1.58% - 2.14%
 
1.86% - 2.4%
Expected term
6.25 years
 
5.25 years
 
4.5 - 5 years
Expected volatility
41% - 42%
 
41% - 44%
 
43% 45%
Weighted average volatility
41%
 
43%
 
44%
Expected dividend yield
0
 
0
 
0
Schedule of Nonvested Stock Options
A summary of our non-vested options as of September 30, 2012 and changes during the twelve months then ended is presented below (in thousands, except per common share amounts):
 
Number of Options
 
Weighted Average Grant Date Fair Value per Common Share
Nonvested at September 30, 2011
1,815

 
$
3.27

Granted
917

 
$
4.45

Vested
(798
)
 
$
3.72

Forfeited
(178
)
 
$
4.21

Nonvested at September 30, 2012
1,756

 
$
3.58
Schedule of Exercise Price Range
At September 30, 2012, the weighted average exercise price and remaining life of the stock options are as follows (in thousands, except remaining life and exercise price):
Options Outstanding
 
Options Exercisable
Range of Exercise Prices
 
Options Outstanding
 
Weighted Average Remaining Contractual Life (In Years)
 
Weighted Average Exercise Price
 
Number of Shares Vested
 
Weighted Average Exercise Price
$2.40 - $8.00
 
178

 
3.77
 
$
6.94

 
178

 
$
6.94

$8.01 - $9.00
 
1,262

 
6.70
 
$
8.22

 
1,019

 
$
8.25

$9.01 - $10.00
 
1,262

 
7.04
 
$
9.68

 
730

 
$
9.71

$10.01 - $11.00
 
1,247

 
7.41
 
$
10.65

 
425

 
$
10.68

$11.01 - $13.00
 
635

 
4.88
 
$
12.34

 
523

 
$
12.51

$13.01 - $15.00
 
677

 
3.95
 
$
13.98

 
630

 
$
13.92

$15.01 - $16.88
 
493

 
4.79
 
$
15.27

 
493

 
$
15.27

$2.40 - $16.88
 
5,754

 
6.15
 
$
10.76

 
3,998

 
$
11.03