Stock-based Compensation (Tables)

6 Months Ended

Mar. 31, 2013

Stock Based Compensation Expenses

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

	Three months ended				Six months ended
	March 31,				March 31,
	2013		2012		2013		2012
Product costs	$	7	$	11	$	10	$	26
Research and development		64		161		87		382
Selling, general and administrative		775		468		1,141		1,125
Total	$	846	$	640	$	1,238	$	1,533

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,
	2013			2012			2013			2012
Risk-free interest rates		0.7	%		0.7	%		0.6	%		0.8	%
Expected life (years)		4.8			4.8			4.8			4.8
Expected volatility		49.1	%		49.6	%		49.2	%		49.6	%
Dividend yield		0.0	%		0.0	%		0.0	%		0.0	%