Condensed Balance Sheets - USD ($)		Mar. 31, 2016	Sep. 30, 2015
Current assets:
Cash and cash equivalents		$ 486,630	$ 603,915
Oil, NGL and natural gas sales receivables (net of allowance for uncollectable accounts)		4,231,534	7,895,591
Refundable income taxes		1,121,703	345,897
Refundable production taxes		454,018	476,001
Derivative contracts, net	[1]	330,751	4,210,764
Other		331,845	252,016
Total current assets		6,956,481	13,784,184
Properties and equipment at cost, based on successful efforts accounting:
Producing oil and natural gas properties		433,557,440	441,141,337
Non-producing oil and natural gas properties		7,643,408	8,293,997
Other		1,060,392	1,393,559
Gross properties and equipment, at cost, based on successful efforts accounting		442,261,240	450,828,893
Less accumulated depreciation, depletion and amortization		(240,429,941)	(228,036,803)
Net properties and equipment		201,831,299	222,792,090
Investments		167,663	2,248,999
Total assets		208,955,443	238,825,273
Current liabilities:
Accounts payable		1,447,314	2,028,746
Deferred income taxes		312,100	1,517,100
Accrued liabilities and other		936,629	1,330,901
Total current liabilities		2,696,043	4,876,747
Long-term debt		54,500,000	65,000,000
Deferred income taxes		32,918,907	39,118,907
Asset retirement obligations		2,895,488	2,824,944
Stockholders' equity:
Class A voting common stock, $.0166 par value; 24,000,000 shares authorized, 16,863,004 issued at March 31, 2016, and September 30, 2015		280,938	280,938
Capital in excess of par value		3,000,554	2,993,119
Deferred directors' compensation		3,242,150	3,084,289
Retained earnings		113,871,183	125,446,473
Stockholders' Equity		120,394,825	131,804,819
Less treasury stock, at cost; 280,624 shares at March 31, 2015, and 302,623 shares at September 30, 2015		(4,449,820)	(4,800,144)
Total stockholders' equity		115,945,005	127,004,675
Total liabilities and stockholders' equity		$ 208,955,443	$ 238,825,273

[1] See Fair Value Measurements section for further disclosures regarding fair value of financial instruments.