Statements Of Stockholders' Equity - USD ($)	Total	At-the-market Offering [Member]	Common Stock [Member]	Common Stock [Member] At-the-market Offering [Member]	Capital in Excess of Par Value [Member]	Capital in Excess of Par Value [Member] At-the-market Offering [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balances at Sep. 30, 2020	$ 62,993,926		$ 377,304		$ 10,649,611		$ 1,874,007	$ 56,244,100	$ (6,151,096)
Balances, shares at Sep. 30, 2020			22,647,306
Balances, Treasury shares at Sep. 30, 2020									(411,487)
Net income (loss)	(596,720)							(596,720)
Equity issued	225,758		$ 2,555		223,203
Equity issued, shares			153,375
Restricted stock awards	122,978				122,978
Dividends	(454,936)							(454,936)
Distribution of restricted stock to officers and directors	353				(316,886)				$ 317,239
Distribution of restricted stock to officers and directors, shares									21,220
Increase in deferred directors' compensation charged to expense	44,527						44,527
Balances at Dec. 31, 2020	62,335,886		$ 379,859		10,678,906		1,918,534	55,192,444	$ (5,833,857)
Balances, shares at Dec. 31, 2020			22,800,681
Balances, Treasury shares at Dec. 31, 2020									(390,267)
Balances at Sep. 30, 2020	62,993,926		$ 377,304		10,649,611		1,874,007	56,244,100	$ (6,151,096)
Balances, shares at Sep. 30, 2020			22,647,306
Balances, Treasury shares at Sep. 30, 2020									(411,487)
Net income (loss)	(1,096,443)
Balances at Mar. 31, 2021	61,732,555		$ 380,268		11,150,749		1,633,939	54,402,724	$ (5,835,125)
Balances, shares at Mar. 31, 2021			22,825,226
Balances, Treasury shares at Mar. 31, 2021									(390,823)
Balances at Dec. 31, 2020	62,335,886		$ 379,859		10,678,906		1,918,534	55,192,444	$ (5,833,857)
Balances, shares at Dec. 31, 2020			22,800,681
Balances, Treasury shares at Dec. 31, 2020									(390,267)
Net income (loss)	(499,723)							(499,723)
Cost of equity issuance	(29,240)				(29,240)
Restricted stock awards	161,170				161,170
Dividends	(289,997)							(289,997)
Distribution of restricted stock to officers and directors	(1,268)								$ (1,268)
Distribution of restricted stock to officers and directors, shares									(556)
Distribution of deferred directors' compensation			$ 409		339,913		(340,322)
Distribution of deferred directors' compensation, shares			24,545
Increase in deferred directors' compensation charged to expense	55,727						55,727
Balances at Mar. 31, 2021	61,732,555		$ 380,268		11,150,749		1,633,939	54,402,724	$ (5,835,125)
Balances, shares at Mar. 31, 2021			22,825,226
Balances, Treasury shares at Mar. 31, 2021									(390,823)
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)								(388,545)
Net income (loss)	$ 6,682,249							6,682,249
Equity issued	3,486,303		$ 25,315		3,460,988
Equity issued, shares			1,519,481
Cost of equity issuance		$ (10,730)				$ (10,730)
Purchase of treasury stock	(1,855)								$ (1,855)
Purchase of treasury stock, shares									(700)
Restricted stock awards	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, 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)								(388,545)
Net income (loss)	$ 2,661,794
Balances at Mar. 31, 2022	$ 84,748,546		$ 574,261		37,596,944		1,407,423	50,778,525	$ (5,608,607)
Balances, shares at Mar. 31, 2022			34,469,449
Balances, Treasury shares at Mar. 31, 2022	(377,232)								(377,232)
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)
Net income (loss)	(4,020,455)							(4,020,455)
Equity issued		$ 8,017		$ 45		$ 7,972
Equity issued, shares				2,710
Cost of equity issuance	(48,166)				(48,166)
Restricted stock awards	433,137				433,137
Distribution of deferred directors' compensation			$ 1,024		462,735		(463,759)
Distribution of deferred directors' compensation, shares			61,452
Increase in deferred directors' compensation charged to expense	35,461						35,461
Balances at Mar. 31, 2022	$ 84,748,546		$ 574,261		$ 37,596,944		$ 1,407,423	$ 50,778,525	$ (5,608,607)
Balances, shares at Mar. 31, 2022			34,469,449
Balances, Treasury shares at Mar. 31, 2022	(377,232)								(377,232)