Goodwill and Intangible Assets (Schedule of Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Sep. 30, 2014
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 12,885	$ 12,885
Accumulated Amortization	(11,495)	(10,981)
Net Carrying Value	1,390	1,904
Purchased Technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	11,749	11,749
Accumulated Amortization	(10,359)	(9,918)
Net Carrying Value	1,390	1,831
Trade Name
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	1,136	1,136
Accumulated Amortization	$ (1,136)	(1,063)
Net Carrying Value		$ 73