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Stock-Based Compensation (Tables)
 12 Months Ended
Sep. 30, 2013
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,
 
2013
 
2012
 
2011
Cost of sales
$
183

 
$
166

 
$
136

Sales and marketing
1,261

 
1,271

 
1,156

Research and development
772

 
724

 
771

General and administrative
1,556

 
1,566

 
1,381

Stock-based compensation before income taxes
3,772

 
3,727

 
3,444

Income tax benefit
(1,192
)
 
(1,240
)
 
(1,143
)
Stock-based compensation after income taxes
$
2,580

 
$
2,487

 
$
2,301
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 Outstanding
 
Weighted Average Exercised Price
 
Weighted Average Contractual Term (in years)
 
Aggregate Intrinsic Value (1)
Balance at September 30, 2012
 
5,754

 
$10.76
 
 
 
 
Additional shares approved for grant
 
 
 
 
 
 
 
 
Granted
 
1,049

 
9.33
 
 
 
 
Exercised
 
(280
)
 
9.76
 
 
 
 
Cancelled
 
(244
)
 
10.35
 
 
 
 
Balance at September 30, 2013
 
6,279

 
$10.67
 
5.6
 
$
3,152

 
 
 
 
 
 
 
 
 
Exercisable at September 30, 2013
 
4,562

 
$11.00
 
4.6
 
$
2,357

(1) The aggregate intrinsic value represents the total pre-tax intrinsic value, based on our closing stock price of $9.99 as of September 30, 2013, 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,
 
2013
 
2012
 
2011
Fair value of options granted (in thousands)
$
3,950

 
$
4,086

 
$
4,948

Weighted average per option grant date fair value
$
3.77

 
$
4.45

 
$
4.14

Assumptions used for option grants:
 
 
 
 
 
Risk free interest rate
0.88% - 1.78%
 
0.84% - 1.33%
 
1.58% - 2.14%
Expected term
6.25 years
 
6.25 years
 
5.25 years
Expected volatility
40%
 
41% - 42%
 
41% - 44%
Weighted average volatility
40%
 
41%
 
43%
Expected dividend yield
0
 
0
 
0
Schedule of Nonvested Stock Options
A summary of our non-vested options as of September 30, 2013 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, 2012
1,756

 
$
3.58

Granted
1,049

 
$
3.77

Vested
(844
)
 
$
3.71

Forfeited
(244
)
 
$
4.05

Nonvested at September 30, 2013
1,717

 
$
3.56
Schedule of Exercise Price Range
At September 30, 2013, 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
$6.75 - $8.03
 
752

 
6.03
 
$
8.01

 
726

 
$
8.01

$8.04 - $9.50
 
1,312

 
7.48
 
$
9.02

 
440

 
$
8.49

$9.51 - $10.00
 
1,274

 
5.99
 
$
9.68

 
905

 
$
9.70

$10.01 - $11.00
 
1,183

 
6.15
 
$
10.65

 
786

 
$
10.66

$11.01 - $13.00
 
616

 
3.64
 
$
12.36

 
594

 
$
12.37

$13.01 - $15.00
 
656

 
2.61
 
$
13.98

 
626

 
$
13.95

$15.01 - $16.88
 
486

 
3.47
 
$
15.27

 
485

 
$
15.27

$6.75 - $16.88
 
6,279

 
5.56
 
$
10.67

 
4,562

 
$
11.00
Schedule of Nonvested Restricted Stock Units
A summary of our non-vested restricted stock units as of September 30, 2013 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, 2012
—

 
$
—

Granted
49

 
$
9.71

Vested
—

 
$
—

Forfeited
—

 
$
—

Nonvested at September 30, 2013
49

 
$
9.71