Stock Based Compensation (Tables)

12 Months Ended

Sep. 30, 2012

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs

The table below outlines the effects of total stock-based compensation.

	Years Ended September 30,
	2012		2011		2010
	(in thousands)
Stock-based compensation
Cost of sales	$	135	$	157	$	134
Research and development	1,461		1,078		849
Selling, general and administrative	3,435		2,807		1,514
Total stock-based compensation	5,031		4,042		2,497
Tax effect on stock-based compensation	—		—		—
Net effect on net income (loss)	$	5,031	$	4,042	$	2,497

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value

The estimated values of stock option grants and stock purchase rights, as well as the weighted average assumptions used in calculating these values during the fiscal years ended September 30, 2012, 2011 and 2010, were based on estimates at the date of grant as follows:

	Stock Options									ESPP
	2012			2011			2010			2012			2011			2010
Expected life (years)	4.40			4.37			4.54			0.50			0.50			0.50
Expected volatility	60.00		%	58.00		%	48.00		%	42.00		%	46.00		%	83.00		%
Risk-free interest rate	0.61		%	1.21		%	2.23		%	0.11		%	0.12		%	0.20		%
Dividend yield	—		%	—		%	—		%	—		%	—		%	—		%
Weighted-average fair value of grants	$	4.70		$	3.88		$	1.94		$	2.66		$	2.66		$	3.28

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable

The following table is a summary of the Company’s stock option activity and related information for the last three fiscal years under the 1989 Stock Plan, 1996 Nonstatutory Stock Plan, 1998 Stock Plan, 1995 Director Stock Option Plan and the 2007 Plan (stock option amounts and aggregate intrinsic value are presented in thousands):

	Outstanding Options
	Number of Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (in years)	Aggregate Intrinsic Value
Balance at September 30, 2009	4,801		$	4.97
Options Granted	1,032		$	4.57
Options Exercised	(1,203	)	$	4.39
Options Cancelled/Expired	(355	)	$	8.17
Balance at September 30, 2010	4,275		$	4.77
Options Granted	1,194		$	8.29
Options Exercised	(524	)	$	4.09
Options Cancelled/Expired	(94	)	$	12.01
Balance at September 30, 2011	4,851		$	5.57
Options Granted	1,608		$	9.91
Options Exercised	(857	)	$	5.18
Options Cancelled/Expired	(125	)	$	9.68
Balance at September 30, 2012	5,477		$	6.81	4.36	$	14,867
Exercisable at September 30, 2012	3,072		$	5.42	3.28	$	12,057
Vested and expected to vest after September 30, 2012	5,319		$	6.74	4.31	$	14,777
Options exercisable at:
September 30, 2010	2,348		$	5.60	3.81
September 30, 2011	2,868		$	5.31	3.51
September 30, 2012	3,072		$	5.42	3.28

Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range

The following table summarizes information about options outstanding and exercisable at September 30, 2012:

					Options Outstanding				Options Exercisable
Range of  Exercise Prices					Number of Options Outstanding (in thousands)	Wtd. Average Remaining Contractual Life (in years)	Wtd. Average Exercise Price		Number of Options Exercisable (in thousands)	Wtd. Average Exercise Price
$	1.50	-	$	2.51	759	3.11	$	2.02	685	$	1.99
$	2.52	-	4.34		899	3.85	$	4.21	606	$	4.17
$	4.35	-	6.56		842	1.74	$	6.01	839	$	6.01
$	6.57	-	9.06		1,100	4.42	$	7.36	644	$	7.30
$	9.07	-	16.08		1,877	6.25	$	10.03	298	$	10.15
$	1.50	-	$	16.08	5,477	4.36	$	6.81	3,072	$	5.42

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity

The following table is a summary of the Company’s RSU activity and related information under the 2007 Plan (RSU amounts and aggregate intrinsic value are presented in thousands):

	Number of Shares		Weighted- Average Grant-Date Fair Value		Aggregate Intrinsic Value
Outstanding awards at September 30, 2009	66		$	5.60
Granted	41		$	8.31
Vested	(29	)	$	5.60
Forfeited	(9	)	$	5.60
Outstanding awards at September 30, 2010	69		$	7.21
Granted	362		$	7.82
Vested	(49	)	$	6.75
Forfeited	—		$	8.80
Outstanding awards at September 30, 2011	382		$	7.84
Granted	106		$	9.42
Vested	(165	)	$	7.73	$	1,563
Forfeited	—		$	10.64
Outstanding awards at September 30, 2012	323		$	8.41	$	2,989