Balance Sheets - USD ($)		Sep. 30, 2017	Sep. 30, 2016
Current Assets:
Cash and cash equivalents		$ 557,791	$ 471,213
Oil, NGL and natural gas sales receivables (net of allowance for uncollectable accounts)		7,585,485	5,287,229
Refundable income taxes		489,945	83,874
Derivative contracts, net	[1]	544,924
Assets held for sale		557,750
Other		253,480	419,037
Total current assets		9,989,375	6,261,353
Properties and equipment at cost, based on successful efforts accounting:
Producing oil and natural gas properties		434,571,516	434,469,093
Non-producing oil and natural gas properties		7,428,927	7,574,649
Other		1,067,894	1,069,658
Gross properties and equipment, at cost, based on successful efforts accounting		443,068,337	443,113,400
Less accumulated depreciation, depletion and amortization		(246,483,979)	(251,707,749)
Net properties and equipment		196,584,358	191,405,651
Investments		170,486	157,322
Total assets		206,744,219	197,824,326
Current Liabilities:
Accounts payable		1,847,230	2,351,623
Derivative contracts, net	[1]		403,612
Accrued liabilities and other		1,690,789	1,718,558
Total current liabilities		3,538,019	4,473,793
Long-term debt		52,222,000	44,500,000
Deferred income taxes		31,051,007	30,676,007
Asset retirement obligations		3,196,889	2,958,048
Derivative contracts, net	[1]	28,765	24,659
Stockholders' equity:
Class A voting common stock, $0.0166 par value; 24,000,000 shares authorized; 16,863,004 issued at September 30, 2017 and 2016		280,938	280,938
Capital in excess of par value		2,726,444	3,191,056
Deferred directors' compensation		3,459,909	3,403,213
Retained earnings		113,330,216	112,482,284
Stockholders' Equity		119,797,507	119,357,491
Treasury stock, at cost; 184,988 shares at September 30, 2017, and 262,708 shares at September 30, 2016		(3,089,968)	(4,165,672)
Total stockholders' equity		116,707,539	115,191,819
Total liabilities and stockholders' equity		$ 206,744,219	$ 197,824,326

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