Condensed Statements Of Cash Flows - USD ($)	6 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Operating Activities
Net income (loss)	$ 10,804,606	$ 14,855,115
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	7,437,662	9,516,902
Provision for deferred income taxes	3,942,000	(12,771,000)
Gain from leasing fee mineral acreage	(722,912)	(595,946)
Proceeds from leasing fee mineral acreage	737,812	610,552
Net (gain) loss on sales of assets	(9,096,938)	466,128
Directors' deferred compensation expense	132,280	170,826
Fair value of derivative contracts	(4,231,222)	2,486,518
Restricted stock awards	446,321	347,838
Other	9,326	(1,337)
Cash provided (used) by changes in assets and liabilities:
Oil, NGL and natural gas sales receivables	715,935	1,110,368
Other current assets	(172,645)	(87,495)
Accounts payable	(77,977)	(73,066)
Income taxes receivable	(538,150)	(302,370)
Other non-current assets	17,317	(66,364)
Accrued liabilities	(342,361)	(306,687)
Total adjustments	(1,743,552)	504,867
Net cash provided by operating activities	9,061,054	15,359,982
Investing Activities
Capital expenditures	(4,159,683)	(6,544,481)
Acquisition of minerals and overrides	(1,809,775)
Investments in partnerships	(199)	7,493
Proceeds from sales of assets	9,096,938	1,129,705
Net cash provided (used) by investing activities	3,127,281	(5,407,283)
Financing Activities
Borrowings under debt agreement	8,686,270	10,596,451
Payments of loan principal	(15,586,270)	(19,318,671)
Purchases of treasury stock	(3,967,685)	(272,100)
Payments of dividends	(1,348,170)	(1,347,608)
Net cash provided (used) by financing activities	(12,215,855)	(10,341,928)
Increase (decrease) in cash and cash equivalents	(27,520)	(389,229)
Cash and cash equivalents at beginning of period	532,502	557,791
Cash and cash equivalents at end of period	504,982	168,562
Supplemental Schedule of Noncash Investing and Financing Activities:
Additions to asset retirement obligations	27,562	13,871
Gross additions to properties and equipment	5,654,060	5,556,196
Net (increase) decrease in accounts payable for properties and equipment additions	315,398	988,285
Capital expenditures and acquisitions	$ 5,969,458	$ 6,544,481

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The cash inflow to dispose of long-lived, physical assets and mineral interests in oil and gas properties used for normal oil and gas operations.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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