Deferred Compensation Plan For Directors (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Deferred Compensation Plan For Directors [Line Items]
Number of shares credited to directors deferred fee account	241,353
Outstanding deferred balance	$ 1,496,243	$ 1,768,151
Total expenses charged to the company's results of operations	$ 191,852	$ 234,466	$ 228,408
Maximum [Member]
Deferred Compensation Plan For Directors [Line Items]
Period outside directors may elect to receive shares	10 years