Condensed Consolidated Unaudited Statements of Shareholders' Equity - USD ($)	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Total
Balance at Sep. 30, 2021	$ 8,834	$ (30,867,287)	$ 24,918,781	$ 83,552,298	$ 77,612,626
Balance (in shares) at Sep. 30, 2021	883,589
Balance (in shares) at Sep. 30, 2021		(332,220)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(3,331,606)	(3,331,606)
Compensation expense and settlement of equity-based awards	$ 334		1,810,343		1,810,677
Compensation expense and settlement of equity-based awards (in shares)	33,420
Net income available to common shareholders				12,052,045	12,052,045
Balance at Jun. 30, 2022	$ 9,168	$ (30,867,287)	26,729,124	92,272,737	88,143,742
Balance (in shares) at Jun. 30, 2022	917,009
Balance (in shares) at Jun. 30, 2022		(332,220)
Balance at Mar. 31, 2022	$ 9,168	$ (30,867,287)	26,555,046	86,336,525	82,033,452
Balance (in shares) at Mar. 31, 2022	917,009
Balance (in shares) at Mar. 31, 2022		(332,220)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(108,596)	(108,596)
Compensation expense and settlement of equity-based awards			174,078		174,078
Net income available to common shareholders				6,044,808	6,044,808
Balance at Jun. 30, 2022	$ 9,168	$ (30,867,287)	26,729,124	92,272,737	88,143,742
Balance (in shares) at Jun. 30, 2022	917,009
Balance (in shares) at Jun. 30, 2022		(332,220)
Balance at Sep. 30, 2022	$ 9,168	$ (30,867,287)	26,903,201	96,784,353	$ 92,829,435
Balance (in shares) at Sep. 30, 2022	917,009				584,789
Balance (in shares) at Sep. 30, 2022		(332,220)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(3,423,089)	$ (3,423,089)
Compensation expense and settlement of equity-based awards	$ 263		3,272,776		3,273,039
Compensation expense and settlement of equity-based awards (in shares)	26,263
Net income available to common shareholders				8,638,954	8,638,954
Committed repurchase of treasury stock		$ (404,876)			(404,876)
Committed repurchase of treasury stock (in shares)		(2,363)
Balance at Jun. 30, 2023	$ 9,431	$ (31,272,163)	30,175,977	102,000,218	$ 100,913,463
Balance (in shares) at Jun. 30, 2023	943,272				608,689
Balance (in shares) at Jun. 30, 2023		(334,583)
Balance at Mar. 31, 2023	$ 9,431	$ (30,867,287)	29,766,566	98,167,058	$ 97,075,768
Balance (in shares) at Mar. 31, 2023	943,272
Balance (in shares) at Mar. 31, 2023		(332,220)
Increase (Decrease) in Stockholders' Equity
Dividends on common stock				(111,219)	(111,219)
Compensation expense and settlement of equity-based awards			409,411		409,411
Net income available to common shareholders				3,944,379	3,944,379
Committed repurchase of treasury stock		$ (404,876)			(404,876)
Committed repurchase of treasury stock (in shares)		(2,363)
Balance at Jun. 30, 2023	$ 9,431	$ (31,272,163)	$ 30,175,977	$ 102,000,218	$ 100,913,463
Balance (in shares) at Jun. 30, 2023	943,272				608,689
Balance (in shares) at Jun. 30, 2023		(334,583)