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Discontinued Operations (Amortization, Depreciation, and Purchase of PPE) (Details) - Etherios, Inc. - Discontinued Operations, Disposed of by Sale - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Amortization of identifiable intangible assets $ 30 $ 121
Depreciation of property, equipment and improvements 0 6
Purchases of property, equipment, improvements and certain other intangible assets $ 0 $ (17)