Income and Other Taxes - Narrative (Details) - USD ($)	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Income tax expense	$ 28,000	$ 94,000
Effective tax rate on continuing operations	0.60%	0.80%
Interest and penalties accrued as tax liabilities	$ 0		$ 0
Uncertain tax reserve, period increase (decrease)	$ 0	$ 0