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, shares at Sep. 30, 2015		16,863,004
Balances, Treasury shares at Sep. 30, 2015						(302,623)
Balances at Sep. 30, 2015	$ 127,004,675	$ 280,938	$ 2,993,119	$ 3,084,289	$ 125,446,473	$ (4,800,144)
Purchase of treasury stock	(117,165)					$ (117,165)
Purchase of treasury stock, shares						(7,477)
Restricted stock awards	508,095		508,095
Net income (loss)	(10,237,279)				(10,237,279)
Dividends ($.08 per share)	(1,338,011)				(1,338,011)
Distribution of restricted stock to officers and directors	(43,712)		(499,829)			$ 456,117
Distribution of restricted stock to officers and directors, shares						28,759
Distribution of deferred directors' compensation			(831)	(10,541)		$ 11,372
Distribution of deferred directors' compensation, shares						717
Increase in deferred directors' compensation charged to expense	168,402			168,402
Balances, shares at Mar. 31, 2016		16,863,004
Balances, Treasury shares at Mar. 31, 2016						(280,624)
Balances at Mar. 31, 2016	$ 115,945,005	$ 280,938	3,000,554	3,242,150	113,871,183	$ (4,449,820)
Balances, shares at Sep. 30, 2016		16,863,004
Balances, Treasury shares at Sep. 30, 2016	(262,708)					(262,708)
Balances at Sep. 30, 2016	$ 115,191,819	$ 280,938	3,191,056	3,403,213	112,482,284	$ (4,165,672)
Purchase of treasury stock	(407,677)					$ (407,677)
Purchase of treasury stock, shares						(17,119)
Restricted stock awards	317,633		317,633
Net income (loss)	1,232,041				1,232,041
Dividends ($.08 per share)	(1,340,656)				(1,340,656)
Distribution of restricted stock to officers and directors	584		(932,059)			$ 932,643
Distribution of restricted stock to officers and directors, shares						58,398
Distribution of deferred directors' compensation			(145,469)	(301,962)		$ 447,431
Distribution of deferred directors' compensation, shares						27,216
Increase in deferred directors' compensation charged to expense	$ 176,368			176,368
Balances, shares at Mar. 31, 2017		16,863,004
Balances, Treasury shares at Mar. 31, 2017	(194,213)					(194,213)
Balances at Mar. 31, 2017	$ 115,170,112	$ 280,938	$ 2,431,161	$ 3,277,619	$ 112,373,669	$ (3,193,275)