Intangible Assets (Schedule by Reporting Segment) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Assets	$ 3,274	$ 4,697
Accumulated Amortization	(3,211)	(4,615)
Net Assets	63	82
Estimated Future Amortization Expense
Remainder of fiscal 2015	6
Fiscal year ended September 30, 2016	25
Fiscal year ended September 30, 2017	32
Fiber Optics | Patents
Finite-Lived Intangible Assets [Line Items]
Gross Assets	3,274	4,697
Accumulated Amortization	(3,211)	(4,615)
Net Assets	$ 63	$ 82