Discontinued Operations (Details) - Etherios, Inc. - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands	1 Months Ended		12 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Sep. 30, 2016	Sep. 30, 2015	Oct. 23, 2017	Sep. 30, 2017	Oct. 23, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration receivable							$ 3,000
Proceeds from Divestiture of Business		$ 3,000
Receivable from Divestiture of Business						$ 2,000
Income tax benefit on discontinued operations			$ (476)	$ (1,627)
Forecast
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration receivable					$ 2,000
Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Business	$ 2,000