Stock-based Compensation (Tables)

6 Months Ended

Mar. 31, 2014

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation Expenses

The Company’s stock-based compensation expenses were allocated to the following expense categories:

	Three months ended March 31,				Six months ended March 31,
(Dollars in thousands)	2014		2013		2014		2013
Product costs	$	4	$	7	$	8	$	10
Research and development		46		64		98		87
Selling, general and administrative		1,599		775		2,356		1,141
Total	$	1,649	$	846	$	2,462	$	1,238

Assumptions Used in Stock Option Plans

The assumptions used as inputs in the model were as follows:

	Three months ended March 31,						Six months ended March 31,
	2014			2013			2014			2013
Risk-free interest rates		1.2	%		0.7	%		1.2	%		0.6	%
Expected life (years)		4.1			4.8			4.6			4.8
Expected volatility		37.1	%		49.1	%		44.5	%		49.2	%
Dividend yield		0.0	%		0.0	%		0.0	%		0.0	%

Schedule of Fair Value at the Date of Grant

The aggregate number of shares that could be awarded to key employees if the minimum, target and maximum performance goals are met, based upon the fair value at the date of grant is as follows:

Performance Period	Minimum Shares		Target Shares		Maximum Shares
Fiscal 2012 - 2014		12,499		62,497		124,994
Fiscal 2013 - 2015		8,551		42,753		85,506
Fiscal 2014 - 2016		7,861		39,303		78,606