Condensed Statements Of Cash Flows - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Sep. 30, 2019
Operating Activities
Net income (loss)			$ (22,117,915)	$ 15,408,842
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation, depletion and amortization	$ 2,464,568	$ 4,383,043	8,793,787	11,820,705
Impairment of producing properties	358,826		29,904,528
Provision for deferred income taxes			(6,158,000)	5,150,000
Gain from leasing fee mineral acreage			(567,975)	(951,832)
Proceeds from leasing fee mineral acreage			582,458	967,337
Net (gain) loss on sales of assets			(3,258,994)	(13,114,725)
Directors' deferred compensation expense			184,188	197,820
Total (gain) loss on derivative contracts	838,282	(2,313,195)	(2,415,401)	(5,026,123)
Cash receipts (payments) on settled derivative contracts			3,230,034	(1,099,402)
Restricted stock awards	128,196	159,911	619,812	606,232
Other			3,718	15,848
Cash provided (used) by changes in assets and liabilities:
Oil, NGL and natural gas sales receivables			2,194,430	1,597,667
Other current assets			(121,635)	(859,258)
Accounts payable			31,755	3,270
Income taxes receivable			(134,908)	(476,846)
Other non-current assets			6,544	6,949
Accrued liabilities			(950,686)	86,467
Total adjustments			31,943,655	(1,075,891)
Net cash provided by operating activities			9,825,740	14,332,951
Investing Activities
Capital expenditures			(196,168)	(3,349,640)
Acquisition of minerals and overrides			(10,304,016)	(5,120,466)
Investments in partnerships				(1,648)
Proceeds from sales of assets			3,457,500	13,114,969
Net cash provided (used) by investing activities			(7,042,684)	4,643,215
Financing Activities
Borrowings under Credit Facility			6,061,725	15,053,345
Payments of loan principal			(11,486,725)	(24,553,345)
Purchases of treasury stock			(7,635)	(6,465,186)
Payments of dividends			(1,486,031)	(2,013,005)
Net cash provided (used) by financing activities			(6,918,666)	(17,978,191)
Increase (decrease) in cash and cash equivalents			(4,135,610)	997,975
Cash and cash equivalents at beginning of period			6,160,691	532,502	$ 532,502
Cash and cash equivalents at end of period	$ 2,025,081	$ 1,530,477	2,025,081	1,530,477	$ 6,160,691
Supplemental Schedule of Noncash Investing and Financing Activities:
Additions to asset retirement obligations			4	27,782
Gross additions to properties and equipment			10,335,534	8,149,347
Net (increase) decrease in accounts payable for properties and equipment additions			164,650	320,759
Capital expenditures and acquisitions			$ 10,500,184	$ 8,470,106