Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Oil and gas sales	$ 69,861	$ 24,846	$ 156,602	$ 78,222
Costs and Expenses [Abstract]
General and administrative, net	4,834	6,180	9,616	12,093
Depreciation, depletion, and amortization	16,039	13,716	29,431	37,156
Accretion of asset retirement obligation	74	88	148	173
Lease operating costs	5,515	5,000	11,789	10,812
Workovers	76	0	90	0
Transportation and gas processing	6,206	4,554	11,262	11,197
Severance and other taxes	3,577	2,037	7,066	5,001
Write-down of oil and gas properties	0	260,342	0	355,948
Operating Expenses	36,321	291,917	69,402	432,380
Operating Income (Loss)	33,540	(267,071)	87,200	(354,158)
Net gain (loss) on commodity derivatives	(46,067)	(8,458)	(64,326)	79,829
Interest expense, net	(7,436)	(8,026)	(14,454)	(16,433)
Other Nonoperating Income (Expense)	12	(1)	9	107
Income (Loss) Before Income Taxes	(19,951)	(283,556)	8,429	(290,655)
Provision (Benefit) for Income Taxes	0	22,420	0	21,179
Net Income (Loss)	$ (19,951)	$ (305,976)	$ 8,429	$ (311,834)
Per Share Amounts-
Earnings Per Share, Basic	$ (1.64)	$ (25.69)	$ 0.70	$ (26.28)
Earnings Per Share, Diluted	$ (1.64)	$ (25.69)	$ 0.68	$ (26.28)
Weighted Average Shares Outstanding - Basic	12,190	11,910	12,110	11,868
Weighted Average Shares Outstanding - Diluted	12,190	11,910	12,379	11,868