Income and Other Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax (expense) benefit	$ (14,000)	$ 0	$ (44,000)	$ 502,000
Effective tax rate on continuing operations	0.10%	0.00%	0.20%	(4.20%)
Interest and penalties accrued as tax liabilities	$ 500,000		$ 500,000		$ 400,000