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		9 Months Ended
	Oct. 23, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Service revenue		$ 0	$ 2,483	$ 891	$ 6,738
Cost of service		0	2,158	713	6,205
Gross profit		0	325	178	533
Operating expenses:
Sales and marketing		0	452	148	1,433
Research and development		0	589	103	1,567
General and administrative		0	246	43	850
Restructuring		0	0	0	106
Total operating expenses		0	1,287	294	3,956
Loss from discontinued operations, before income taxes		0	(962)	(116)	(3,423)
Gain on sale of discontinued operations, before income taxes	$ 2,870	0	0	2,870	0
Total income (loss) from discontinued operations, before income taxes		0	(962)	2,754	(3,423)
Income tax benefit on discontinued operations		0	(373)	(476)	(1,261)
Income (loss) from discontinued operations, after income taxes		$ 0	$ (589)	$ 3,230	$ (2,162)