Statements Of Stockholders' Equity - USD ($)	Total	Class A voting Common Stock [Member]	Capital in Excess of Par Value [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]
Balances at Sep. 30, 2019	$ 79,309,533	$ 281,509	$ 2,967,984	$ 2,555,781	$ 81,848,301	$ (8,344,042)
Balances, shares at Sep. 30, 2019		16,897,306
Balances, Treasury shares at Sep. 30, 2019						(558,051)
Net income (loss)	1,892,114				1,892,114
Purchase of treasury stock	(7,635)					$ (7,635)
Purchase of treasury stock, shares						(632)
Restricted stock awards	148,515		148,515
Dividends	(1,319,899)				(1,319,899)
Distribution of restricted stock to officers and directors	93		(82,821)			$ 82,914
Distribution of restricted stock to officers and directors, shares						5,546
Increase in deferred directors' compensation charged to expense	86,212			86,212
Balances at Dec. 31, 2019	80,108,933	$ 281,509	3,033,678	2,641,993	82,420,516	$ (8,268,763)
Balances, shares at Dec. 31, 2019		16,897,306
Balances, Treasury shares at Dec. 31, 2019						(553,137)
Balances at Sep. 30, 2019	79,309,533	$ 281,509	2,967,984	2,555,781	81,848,301	$ (8,344,042)
Balances, shares at Sep. 30, 2019		16,897,306
Balances, Treasury shares at Sep. 30, 2019						(558,051)
Net income (loss)	(18,562,700)
Balances at Mar. 31, 2020	60,051,137	$ 281,509	3,264,383	2,092,426	61,965,702	$ (7,552,883)
Balances, shares at Mar. 31, 2020		16,897,306
Balances, Treasury shares at Mar. 31, 2020						(505,252)
Balances at Dec. 31, 2019	80,108,933	$ 281,509	3,033,678	2,641,993	82,420,516	$ (8,268,763)
Balances, shares at Dec. 31, 2019		16,897,306
Balances, Treasury shares at Dec. 31, 2019						(553,137)
Net income (loss)	(20,454,814)				(20,454,814)
Restricted stock awards	343,101		343,101
Distribution of deferred Directors' compensation	(1)		(112,396)	(603,485)		$ 715,880
Distribution of deferred directors' compensation, shares						47,885
Increase in deferred directors' compensation charged to expense	53,918			53,918
Balances at Mar. 31, 2020	60,051,137	$ 281,509	3,264,383	2,092,426	61,965,702	$ (7,552,883)
Balances, shares at Mar. 31, 2020		16,897,306
Balances, Treasury shares at Mar. 31, 2020						(505,252)
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)					(411,487)
Net income (loss)	$ (596,720)				(596,720)
Equity offering	225,758	$ 2,555	223,203
Equity offering, 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)					(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	(390,267)					(390,267)
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)
Equity offering	(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 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	(390,267)					(390,267)