Condensed Balance Sheets - USD ($)		Jun. 30, 2016	Sep. 30, 2015
Current assets:
Cash and cash equivalents		$ 506,541	$ 603,915
Oil, NGL and natural gas sales receivables (net of allowance for uncollectable accounts)		4,404,084	7,895,591
Deferred income taxes		529,900
Refundable income taxes			345,897
Assets held for sale		1,456,851
Refundable production taxes			476,001
Derivative contracts, net	[1]		4,210,764
Other		182,779	252,016
Total current assets		7,080,155	13,784,184
Properties and equipment at cost, based on successful efforts accounting:
Producing oil and natural gas properties		433,025,959	441,141,337
Non-producing oil and natural gas properties		7,593,698	8,293,997
Other		1,069,658	1,393,559
Gross properties and equipment, at cost, based on successful efforts accounting		441,689,315	450,828,893
Less accumulated depreciation, depletion and amortization		(246,216,837)	(228,036,803)
Net properties and equipment		195,472,478	222,792,090
Investments		163,918	2,248,999
Total assets		202,716,551	238,825,273
Current liabilities:
Accounts payable		1,499,739	2,028,746
Derivative contracts, net	[1]	1,690,516
Deferred income taxes			1,517,100
Income taxes payable		659,319
Accrued liabilities and other		1,212,155	1,330,901
Total current liabilities		5,061,729	4,876,747
Long-term debt		49,200,000	65,000,000
Deferred income taxes		30,821,907	39,118,907
Asset retirement obligations		2,928,176	2,824,944
Stockholders' equity:
Class A voting common stock, $.0166 par value; 24,000,000 shares authorized, 16,863,004 issued at June 30, 2016, and September 30, 2015		280,938	280,938
Capital in excess of par value		3,085,815	2,993,119
Deferred directors' compensation		3,321,583	3,084,289
Retained earnings		112,414,741	125,446,473
Stockholders' Equity		119,103,077	131,804,819
Less treasury stock, at cost; 277,378 shares at June 30, 2016, and 302,623 shares at September 30, 2015		(4,398,338)	(4,800,144)
Total stockholders' equity		114,704,739	127,004,675
Total liabilities and stockholders' equity		$ 202,716,551	$ 238,825,273

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