Discontinued Operations (Income(loss) from Discontinued Operations, Net of Tax) (Details) - Etherios, Inc. - Discontinued Operations, Disposed of by Sale - USD ($) $ in Thousands		3 Months Ended
	Oct. 23, 2015	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Service revenue		$ 891	$ 1,505
Cost of service		713	2,140
Gross profit (loss)		178	(635)
Operating expenses:
Sales and marketing		148	557
Research and development		103	479
General and administrative		43	413
Total operating expenses		294	1,449
Loss from discontinued operations, before income taxes		(116)	(2,084)
Gain on sale of discontinued operations, before income taxes	$ 2,912	2,912	0
Total income (loss) from discontinued operations, before income taxes		2,796	(2,084)
Income tax benefit on discontinued operations		(523)	(727)
Income (loss) from discontinued operations, after income taxes		$ 3,319	$ (1,357)