Stock-based Compensation (Tables)

6 Months Ended

Mar. 31, 2015

Disclosure of Compensation Related Costs, Share-based 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)	2015		2014		2015		2014
Product costs	$	5	$	4	$	13	$	8
Research and development		54		46		114		98
Selling, general and administrative		627		1,599		1,084		2,356
Total	$	686	$	1,649	$	1,211	$	2,462

Assumptions Used in Stock Option Plans

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

	Three Months Ended						Six Months Ended
	March 31,						March 31,
	2015			2014			2015			2014
Risk-free interest rates		1.4	%		1.2	%		1.4	%		1.2	%
Expected life (years)		4.5			4.1			4.5			4.6
Expected volatility		43.2	%		37.1	%		43.3	%		44.5	%
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 our executives if the minimum, target and maximum performance goals are met, based on the fair value at the date of grant is as follows:

Performance Period	Minimum Shares		Target Shares		Maximum Shares
Fiscal 2013 – 2015		8,551		42,753		85,506
Fiscal 2014 – 2016		7,861		39,303		78,606
Fiscal 2015 – 2017		8,440		42,199		84,398