Statements Of Stockholders' Equity - USD ($)	Total	Common Stock [Member]	Capital in Excess of Par Value [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balances at Sep. 30, 2021	$ 78,708,739	$ 545,956	$ 33,213,645	$ 1,768,151	$ 48,966,420	$ (5,785,433)
Balances, shares at Sep. 30, 2021		32,770,433
Balances, Treasury shares at Sep. 30, 2021						(388,545)
Net income (loss)	6,682,249				6,682,249
Equity issued to acquire assets	3,486,303	$ 25,315	3,460,988
Equity issued to acquire assets, shares		1,519,481
At-the-market offering fees	(10,730)		(10,730)
Purchase of treasury stock	(1,855)					$ (1,855)
Purchase of treasury stock, shares						(700)
Restricted stock award expense	255,844		255,844
Dividends	(849,689)				(849,689)
Distribution of restricted stock to officers and directors	2,121	$ 1,921	(178,481)			$ 178,681
Distribution of restricted stock to officers and directors, shares		115,373				12,013
Increase in deferred directors' compensation charged to expense	67,570			67,570
Balances at Dec. 31, 2021	88,340,552	$ 573,192	36,741,266	1,835,721	54,798,980	$ (5,608,607)
Balances, shares at Dec. 31, 2021		34,405,287
Balances, Treasury shares at Dec. 31, 2021						(377,232)
Balances at Sep. 30, 2022	$ 107,778,519	$ 596,041	44,177,051	1,496,243	67,117,791	$ (5,608,607)
Balances, shares at Sep. 30, 2022		35,776,752
Balances, Treasury shares at Sep. 30, 2022	(377,232)					(377,232)
Net income (loss)	$ 3,346,133				3,346,133
Purchase of treasury stock	(52,460)					$ (52,460)
Purchase of treasury stock, shares						(14,442)
Restricted stock award expense	524,257		524,257
Dividends	(1,538,150)				(1,538,150)
Distribution of restricted stock to officers and directors		$ 2,690	(1,356,392)			$ 1,353,702
Distribution of restricted stock to officers and directors, shares		161,454				91,402
Increase in deferred directors' compensation charged to expense	44,827			44,827
Balances at Dec. 31, 2022	$ 110,103,126	$ 598,731	$ 43,344,916	$ 1,541,070	$ 68,925,774	$ (4,307,365)
Balances, shares at Dec. 31, 2022		35,938,206
Balances, Treasury shares at Dec. 31, 2022	(300,272)					(300,272)