Intangible Assets (Schedule of Intangible Assets Subject to Amortization) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Sep. 30, 2013
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 12,885	$ 30,465
Accumulated Amortization	(10,738)	(18,853)
Net Carrying Value	2,147	11,612
Purchased Technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	11,749	11,749
Accumulated Amortization	(9,727)	(9,489)
Net Carrying Value	2,022	2,260
Trade Name
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	1,136	1,136
Accumulated Amortization	(1,011)	(967)
Net Carrying Value	125	169
Supply Agreement
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value		17,580
Accumulated Amortization		(8,397)
Net Carrying Value		$ 9,183