Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2022
Summary Of Significant Accounting Policies [Line Items]
Tourism taxes payable	$ 80,000	$ 80,000
Allowance for credit losses	20,000	0
Provision for expected credit losses	5,000
Cumulative change due to adoption of ASU 2016-13	15,000
Cash and cash equivalents	10,786,000	9,293,000	$ 10,586,000
Federally insured limit amount	250,000
Operating cash	375,000
Treasury instruments	1,098,000	1,042,000
Advertising expense	$ 61,000	$ 71,000