Stock Based Compensation (Tables)

9 Months Ended

Jun. 30, 2013

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

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

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

	Three Months Ended June 30,				Nine Months Ended June 30,
	2013		2012		2013		2012
	(In thousands)
Stock-based compensation
Cost of sales	$	46	$	35	$	133	$	101
Research and development	566		395		1,665		1,053
Selling, general and administrative	852		853		2,575		2,576
Total stock-based compensation	1,464		1,283		4,373		3,730
Tax effect on stock-based compensation	—		—		—		—
Net effect on net income	$	1,464	$	1,283	$	4,373	$	3,730

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

The weighted average estimated fair values of stock option grants and rights granted under the ESPP, as well as the weighted average assumptions used in calculating these values during the three and nine month periods ended June 30, 2013 and 2012 were based on estimates at the date of grant as follows:

	Three Months Ended June 30,						Nine Months Ended June 30,
	2013			2012			2013			2012
Options
Weighted-average fair value of grants	$	4.31		$	5.07		$	4.31		$	4.60
Expected term in years	4.45			4.37			4.45			4.37
Estimated volatility	55		%	59		%	59		%	60		%
Risk-free interest rate	0.62		%	0.58		%	0.53		%	0.66		%
Dividend yield	—		%	—		%	—		%	—		%
ESPP
Weighted-average fair value of grants	$	—		$	—		$	2.30		$	2.98
Expected term in years	—			—			0.49			0.5
Estimated volatility	—		%	—		%	32		%	52		%
Risk-free interest rate	—		%	—		%	0.11		%	0.07		%
Dividend yield	—		%	—		%	—		%	—		%

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

A summary of the Company’s stock option activity and related information for the nine months ended June 30, 2013 follows (number of shares and aggregate intrinsic value are presented in thousands):

	Number of Shares		Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term in Years	Aggregate Intrinsic Value
Outstanding at September 30, 2012	5,477		$	6.81
Granted	1,030		$	9.15
Exercised	(855	)	$	5.27		$	4,203
Cancelled/Expired	(57	)	$	9.68
Outstanding at June 30, 2013	5,595		$	7.45	4.37	$	19,671
Exercisable at June 30, 2013	3,155		$	6.13	3.36	$	15,265
Vested and expected to vest after June 30, 2013	5,439		$	7.39	4.32	$	19,434

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

A summary of the Company’s RSU activity and related information for the nine months ended June 30, 2013 under the 2007 Plan follows (number of shares and aggregate intrinsic value are presented in thousands):

	Number of Shares		Weighted-Average Grant Date Fair Value		Aggregate Intrinsic Value
Outstanding at September 30, 2012	323		$	8.41
Granted	121		$	9.14
Vested	(169	)	$	7.90	$	1,575
Forfeited	(1	)	$	10.64
Outstanding at June 30, 2013	274		$	9.04	$	3,008