Discontinued Operations (Amortization, Depreciation, and Purchase of PPE) (Details) - Etherios, Inc. - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of identifiable intangible assets	$ 30	$ 241
Depreciation of property, equipment and improvements	0	14
Purchases of property, equipment, improvements and certain other intangible assets	$ 0	$ (11)