Intangible Assets (Tables)

6 Months Ended

Mar. 31, 2013

Intangible Assets [Abstract]

Schedule Of Intangible Assets Subject To Amortization

	March 31, 2013						September 30, 2012
	Gross				Net		Gross				Net
	Carrying		Accumulated		Carrying		Carrying		Accumulated		Carrying
	Value		Amortization		Value		Value		Amortization		Value
Supply agreement	$	17,580	$	(7,811)	$	9,769	$	17,580	$	(7,225)	$	10,355
Purchased technology		11,767		(9,301)		2,466		11,818		(9,121)		2,697
Trade name		1,136		(932)		204		1,136		(871)		265
Total	$	30,483	$	(18,044)	$	12,439	$	30,534	$	(17,217)	$	13,317