Condensed Statements Of Cash Flows - USD ($)	9 Months Ended
Jun. 30, 2018	Jun. 30, 2017
Operating Activities
Net income (loss)	$ 14,080,022	$ 2,492,799
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	14,136,411	13,654,268
Impairment	0	10,788
Provision for deferred income taxes	(12,947,000)	149,000
Gain from leasing fee mineral acreage	(1,079,803)	(3,999,632)
Proceeds from leasing fee mineral acreage	1,102,818	4,026,283
Net (gain) loss on sales of assets	660,597	87,161
Directors' deferred compensation expense	233,573	266,182
Fair value of derivative contracts	3,819,639	(1,879,668)
Restricted stock awards	501,626	454,854
Other	5,113	2,897
Cash provided (used) by changes in assets and liabilities:
Oil, NGL and natural gas sales receivables	1,095,996	(564,767)
Other current assets	77,124	196,362
Accounts payable	(125,261)	(127,375)
Income taxes receivable	279,975	(488,112)
Other non-current assets	(52,644)
Accrued liabilities	(130,284)	40,197
Total adjustments	7,577,880	11,828,438
Net cash provided by operating activities	21,657,902	14,321,237
Investing Activities
Capital expenditures	(7,743,097)	(18,011,721)
Acquisition of minerals and overrides	(966,279)
Investments in partnerships	3,379	(18,531)
Proceeds from sales of assets	1,085,137	718,700
Net cash provided (used) by investing activities	(7,620,860)	(17,311,552)
Financing Activities
Borrowings under debt agreement	13,529,879	16,702,602
Payments of loan principal	(25,352,099)	(11,202,602)
Purchases of treasury stock	(272,100)	(407,677)
Payments of dividends	(2,023,500)	(2,012,329)
Net cash provided (used) by financing activities	(14,117,820)	3,079,994
Increase (decrease) in cash and cash equivalents	(80,778)	89,679
Cash and cash equivalents at beginning of period	557,791	471,213
Cash and cash equivalents at end of period	477,013	560,892
Supplemental Schedule of Noncash Investing and Financing Activities:
Additions to asset retirement obligations	15,452	60,276
Gross additions to properties and equipment	8,150,830	19,579,304
Net (increase) decrease in accounts payable for properties and equipment additions	558,546	(1,567,583)
Capital expenditures and acquisitions	$ 8,709,376	$ 18,011,721

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