Statements Of Stockholders' Equity - USD ($)	Class A voting Common Stock [Member]	Capital in Excess of Par Value [Member]	Deferred Directors' Compensation [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balances at Sep. 30, 2014	$ 280,938	$ 2,861,343	$ 3,110,351	$ 118,794,188	$ (5,858,167)	$ 119,188,653
Balances, Treasury shares at Sep. 30, 2014					(372,364)
Balances, shares at Sep. 30, 2014	16,863,004
Purchase of treasury stock					$ (120,611)	(120,611)
Purchase of treasury stock, shares					(7,177)
Restricted stock awards		531,243				531,243
Net income (loss)				10,937,968		10,937,968
Dividends ($.08 per share)				(1,333,023)		(1,333,023)
Distribution of restricted stock to officers and directors		(476,423)			$ 417,665	(58,758)
Distribution of restricted stock to officers and directors, shares					26,533
Distribution of deferred directors' compensation		16,045	(328,415)		$ 352,359	39,989
Distribution of deferred directors' compensation, shares					22,372
Increase in deferred directors' compensation charged to expense			169,464			169,464
Balances, shares at Mar. 31, 2015	16,863,004
Balances, treasury shares at Mar. 31, 2015					(330,636)
Balances at Mar. 31, 2015	$ 280,938	2,932,208	2,951,400	128,399,133	$ (5,208,754)	129,354,925
Balances at Sep. 30, 2015	$ 280,938	2,993,119	3,084,289	125,446,473	$ (4,800,144)	$ 127,004,675
Balances, Treasury shares at Sep. 30, 2015					(302,623)	(302,623)
Balances, shares at Sep. 30, 2015	16,863,004
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		(499,829)			$ 456,117	(43,712)
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)	(280,624)
Balances at Mar. 31, 2016	$ 280,938	$ 3,000,554	$ 3,242,150	$ 113,871,183	$ (4,449,820)	$ 115,945,005