CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Total revenues	$ 46,584	$ 27,676	$ 114,403	$ 84,660
Expenses
Lease operating expenses	9,080	8,069	26,266	32,409
Production, ad valorem, and other taxes	2,219	2,333	6,929	7,386
Depreciation and depletion — oil and natural gas	2,092	7,525	6,790	45,728
Depreciation and amortization — other	1,513	1,698	4,482	6,071
Impairment	0	44,043	0	253,797
General and administrative	2,229	2,493	6,841	12,290
Restructuring expenses	(1,696)	1,199	614	1,643
Employee termination benefits	0	3,184	49	8,431
(Gain) loss on derivative contracts	4,129	5,299	4,129	(7,168)
(Gain) loss on sale of assets	761	(178)	(18,952)	(100)
Other operating (income) expense, net	(202)	62	(315)	369
Total expenses	20,125	75,727	36,833	360,856
Income (loss) from operations	26,459	(48,051)	77,570	(276,196)
Other income (expense)
Interest expense, net	(256)	(569)	(387)	(1,653)
Other income (expense), net	2,396	(129)	2,711	5
Total other income (expense)	2,140	(698)	2,324	(1,648)
Income (loss) before income taxes	28,599	(48,749)	79,894	(277,844)
Income tax expense (benefit)	0	0	0	(646)
Net income (loss)	$ 28,599	$ (48,749)	$ 79,894	$ (277,198)
Net income (loss) per share
Basic (in dollars per share)	$ 0.78	$ (1.36)	$ 2.20	$ (7.78)
Diluted (in dollars per share)	$ 0.77	$ (1.36)	$ 2.15	$ (7.78)
Weighted average number of common shares outstanding
Basic (in shares)	36,577	35,783	36,318	35,649
Diluted (in shares)	36,996	35,783	37,200	35,649
Oil, natural gas and NGL
Revenues
Total revenues	$ 46,584	$ 27,547	$ 114,403	$ 84,134
Other
Revenues
Total revenues	$ 0	$ 129	$ 0	$ 526