Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Operating loss carryforwards	$ 5,200,000	$ 6,200,000
State and local net operating loss carryforwards of net of valuation allowance	4,500,000
Federal operating loss carryforwards, net of valuation allowances	600,000
Foreign operating loss carryforwards, net of valuation allowances	100,000
Foreign tax credits, net	0
Valuation allowance	15,800,000	15,000,000.0
Net change in total valuation allowance	800,000
Foreign tax credit carryforwards	1,600,000	2,000,000.0
Foreign earnings repatriated	$ 29,700,000	$ 300,600,000