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, 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)					(390,267)