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					$ (242,313)	(242,313)
Purchase of treasury stock, shares					(12,719)
Restricted stock awards		740,043				740,043
Net income (loss)				10,209,022		10,209,022
Dividends ($.12 per share)				(2,001,150)		(2,001,150)
Distribution of restricted stock to officers and directors		(738,432)			$ 725,858	(12,574)
Distribution of restricted stock to officers and directors, shares					46,083
Distribution of deferred directors' compensation		16,046	(328,415)		$ 352,358	39,989
Distribution of deferred directors' compensation, shares					22,372
Increase in deferred directors' compensation charged to expense			232,088			232,088
Balances, shares at Jun. 30, 2015	16,863,004
Balances, treasury shares at Jun. 30, 2015					(316,628)
Balances at Jun. 30, 2015	$ 280,938	2,879,000	3,014,024	127,002,060	$ (5,022,264)	128,153,758
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		644,783				644,783
Net income (loss)				(11,024,074)		(11,024,074)
Dividends ($.12 per share)				(2,007,658)		(2,007,658)
Distribution of restricted stock to officers and directors		(551,256)			$ 507,599	(43,657)
Distribution of restricted stock to officers and directors, shares					32,005
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			247,835			$ 247,835
Balances, shares at Jun. 30, 2016	16,863,004
Balances, treasury shares at Jun. 30, 2016					(277,378)	(277,378)
Balances at Jun. 30, 2016	$ 280,938	$ 3,085,815	$ 3,321,583	$ 112,414,741	$ (4,398,338)	$ 114,704,739