Condensed Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Net income	$ 2,148,298		$ 3,412,110
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	5,639,020		4,142,413
Impairment	154,965	[1]	363,547	[1]
Provision for deferred income taxes	338,000		231,000
Exploration costs	19,767		313,370
Gain from leasing of fee mineral acreage	(373,440)		(1,754,982)
Net (gain) loss on sale of assets			(116,879)
Income from partnerships	(154,396)		(126,944)
Distributions received from partnerships	194,147		150,404
Directors' deferred compensation expense	114,164		119,876
Restricted stock awards	257,877		57,729
Cash provided by changes in assets and liabilities:
Oil and natural gas sales receivables	115,645		338,124
Fair value of derivative contracts	(936,914)		536,014
Refundable production taxes	212,834		65,919
Other current assets	47,528		(40,662)
Accounts payable	(361,777)		(95,148)
Income taxes receivable	319,735		354,246
Other non-current assets			308
Income taxes payable			264,786
Accrued liabilities	(577,210)		(469,579)
Total adjustments	5,009,945		4,333,542
Net cash provided by operating activities	7,158,243		7,745,652
Investing Activities
Capital expenditures, including dry hole costs	(6,864,399)		(6,344,006)
Acquisition of working interest properties			(17,399,052)
Acquisition of minerals and overrides	(330,000)		(1,384,897)
Proceeds from leasing of fee mineral acreage	384,790		1,802,892
Investments in partnerships	(243,519)		(63,242)
Proceeds from sales of assets			128,925
Excess tax benefit on stock-based compensation	15,000
Net cash used in investing activities	(7,038,128)		(23,259,380)
Financing Activities
Borrowings under debt agreement	4,171,662		25,726,136
Payments of loan principal	(4,591,890)		(11,203,765)
Purchase of treasury stock	(116,632)
Payments of dividends	(580,991)		(579,756)
Net cash provided by (used in) financing activities	(1,117,851)		13,942,615
Increase (decrease) in cash and cash equivalents	(997,736)		(1,571,113)
Cash and cash equivalents at beginning of period	1,984,099		3,506,999
Cash and cash equivalents at end of period	986,363		1,935,886
Supplemental Schedule of Noncash Investing and Financing Activities
Dividends declared and unpaid	583,438		581,319
Additions to asset retirement obligations	42,156		16,246
Gross additions to properties and equipment	5,218,194		23,483,505
Net (increase) decrease in accounts payable for properties and equipment additions	1,976,205		1,644,450
Capital expenditures and acquisitions, including dry hole costs	$ 7,194,399		$ 25,127,955

[1] At the end of each quarter, the Company assesses the carrying value of its producing properties for impairment. This assessment utilizes estimates of future cash flows. Significant judgments and assumptions in these assessments include estimates of future oil and natural gas prices using a forward NYMEX curve adjusted for locational basis differentials, drilling plans, expected capital costs and an applicable discount rate commensurate with risk of the underlying cash flow estimates. These assessments identified certain properties with carrying value in excess of their calculated fair values.