Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Oil and gas sales	$ 45,699	$ 72,014	$ 123,921	$ 218,781
Costs and Expenses [Abstract]
General and administrative, net	5,833	6,247	17,926	19,146
Depreciation, depletion, and amortization	13,975	24,937	51,130	70,771
Accretion of asset retirement obligation	90	88	263	257
Lease operating costs	5,211	5,507	16,023	15,074
Workovers	8	93	8	613
Transportation and gas processing	5,094	6,782	16,291	19,917
Severance and other taxes	2,512	3,778	7,513	11,044
Write-down of oil and gas properties	0	0	355,948	0
Operating Expenses	32,723	47,432	465,102	136,822
Operating Income (Loss)	12,976	24,582	(341,181)	81,959
Net gain (loss) on commodity derivatives	(12,944)	13,409	66,884	34,312
Interest expense, net	(7,444)	(9,435)	(23,876)	(27,500)
Other Nonoperating Income (Expense)	(56)	134	50	173
Income (Loss) Before Income Taxes	(7,468)	28,690	(298,123)	88,944
Provision (Benefit) for Income Taxes	(572)	1,039	20,607	(19,464)
Net Income (Loss)	$ (6,896)	$ 27,651	$ (318,730)	$ 108,408
Per Share Amounts-
Earnings Per Share, Basic	$ (0.58)	$ 2.35	$ (26.81)	$ 9.24
Earnings Per Share, Diluted	$ (0.58)	$ 2.35	$ (26.81)	$ 9.21
Weighted Average Shares Outstanding - Basic	11,935	11,762	11,890	11,739
Weighted Average Shares Outstanding - Diluted	11,935	11,780	11,890	11,776