Stock-based Compensation (Tables)

6 Months Ended

Mar. 31, 2016

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				Six Months Ended
	March 31,				March 31,
(Dollars in thousands)	2016		2015		2016		2015
Product costs	$	1	$	5	$	8	$	13
Research and development		60		54		119		114
Selling, general and administrative		1,154		627		1,772		1,084
Total	$	1,215	$	686	$	1,899	$	1,211

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,
		2016			2015			2016			2015
Risk-free interest rates			1.1	%		1.4	%		1.9	%		1.4	%
Expected life (years)			4.7			4.5			4.6			4.5
Expected volatility			37.8	%		43.2	%		36.8	%		43.3	%
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		MaximumShares
Fiscal 2014 – 2016		7,861		39,303		78,606
Fiscal 2015 – 2017		8,440		42,199		84,398
Fiscal 2016 – 2018		13,268		66,338		132,676