Goodwill and Intangible Assets (Schedule of Intangible Assets Subject to Amortization) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Sep. 30, 2015
Finite Lived Intangible Assets [Line Items]
Accumulated Amortization	$ (10,518)	$ (10,359)
Goodwill Gross Carrying Value	1,003	1,003
Goodwill Net Carrying Value	1,003	1,003
Gross Carrying Value	12,752	12,752
Net Carrying Value	2,234	2,393
Purchased Technology
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	11,749	11,749
Accumulated Amortization	(10,518)	(10,359)
Net Carrying Value	$ 1,231	$ 1,390