Income and Other Taxes (Narrative) (Details) - USD ($)	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income tax (expense) benefit	$ 14,000	$ 15,000
Effective tax rate on continuing operations	0.00%	0.10%
Interest and penalties accrued as tax liabilities	$ 500,000		$ 500,000