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, 2015	$ 127,004,675	$ 280,938	$ 2,993,119	$ 3,084,289	$ 125,446,473	$ (4,800,144)
Balances, shares at Sep. 30, 2015		16,863,004
Balances, Treasury shares at Sep. 30, 2015						(302,623)
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	(43,657)		(551,256)			$ 507,599
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 at Jun. 30, 2016	114,704,739	$ 280,938	3,085,815	3,321,583	112,414,741	$ (4,398,338)
Balances, shares at Jun. 30, 2016		16,863,004
Balances, Treasury shares at Jun. 30, 2016						(277,378)
Balances at Sep. 30, 2016	$ 115,191,819	$ 280,938	3,191,056	3,403,213	112,482,284	$ (4,165,672)
Balances, shares at Sep. 30, 2016		16,863,004
Balances, Treasury shares at Sep. 30, 2016	(262,708)					(262,708)
Purchase of treasury stock	$ (407,677)					$ (407,677)
Purchase of treasury stock, shares						(17,119)
Issuance of treasury shares to ESOP	(18)		(2)			$ (16)
Issuance of treasury shares to ESOP, shares						(1)
Restricted stock awards	454,854		454,854
Net income (loss)	2,492,799				2,492,799
Dividends ($.12 per share)	(2,012,329)				(2,012,329)
Distribution of restricted stock to officers and directors	622		(968,617)			$ 969,239
Distribution of restricted stock to officers and directors, shares						60,624
Distribution of deferred directors' compensation	(1)		(145,469)	(301,963)		$ 447,431
Distribution of deferred directors' compensation, shares						27,216
Increase in deferred directors' compensation charged to expense	266,182			266,182
Balances at Jun. 30, 2017	$ 115,986,251	$ 280,938	$ 2,531,822	$ 3,367,432	$ 112,962,754	$ (3,156,695)
Balances, shares at Jun. 30, 2017		16,863,004
Balances, Treasury shares at Jun. 30, 2017	(191,988)					(191,988)