Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Oil and gas sales	$ 72,014	$ 65,034	$ 218,781	$ 169,134
Costs and Expenses [Abstract]
General and administrative, net	6,247	5,486	19,146	16,856
Depreciation, depletion, and amortization	24,937	18,766	70,771	44,994
Accretion of asset retirement obligation	88	87	257	330
Lease operating costs	5,507	4,207	15,074	12,927
Workovers	93	0	613	0
Transportation and gas processing	6,782	6,138	19,917	16,585
Severance and other taxes	3,778	2,464	11,044	8,156
Operating Expenses	47,432	37,148	136,822	99,848
Operating Income (Loss)	24,582	27,886	81,959	69,286
Net gain (loss) on commodity derivatives	13,409	(13,600)	34,312	(30,707)
Interest expense, net	(9,435)	(7,212)	(27,500)	(19,686)
Other Nonoperating Income (Expense)	134	226	173	(477)
Income (Loss) Before Income Taxes	28,690	7,300	88,944	18,416
Provision (Benefit) for Income Taxes	1,039	220	(19,464)	549
Net Income (Loss)	$ 27,651	$ 7,080	$ 108,408	$ 17,867
Per Share Amounts-
Earnings Per Share, Basic	$ 2.35	$ 0.61	$ 9.24	$ 1.53
Earnings Per Share, Diluted	$ 2.35	$ 0.60	$ 9.21	$ 1.52
Weighted Average Shares Outstanding - Basic	11,762	11,671	11,739	11,643
Weighted Average Shares Outstanding - Diluted	11,780	11,792	11,776	11,759