Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Total revenues	$ 168,882	$ 114,976	$ 266,845
Expenses
Lease operating expenses	35,999	43,431	90,938
Production, ad valorem, and other taxes	9,918	9,634	19,394
Depreciation and depletion—oil and natural gas	9,372	50,349	146,874
Depreciation and amortization—other	6,073	7,736	11,684
Impairment	0	256,399	409,574
General and administrative	9,675	15,327	32,058
Restructuring expenses	792	2,733	0
Employee termination benefits	49	8,433	4,792
Loss (gain) on derivative contracts	2,251	(5,765)	(1,094)
(Gain) loss on sale of assets	(18,952)	(100)	0
Other operating (income) expense	(382)	306	(608)
Total expenses	54,795	388,483	713,612
Income (loss) from operations	114,087	(273,507)	(446,767)
Other (expense) income
Interest expense, net	(404)	(1,998)	(2,974)
Other (expense) income, net	3,055	(2,494)	436
Total other (expense) income	2,651	(4,492)	(2,538)
Income (loss) before income taxes	116,738	(277,999)	(449,305)
Income tax benefit	0	(646)	0
Net income (loss)	$ 116,738	$ (277,353)	$ (449,305)
Net income (loss) per share
Basic (in dollars per share)	$ 3.21	$ (7.77)	$ (12.68)
Diluted (in dollars per share)	$ 3.13	$ (7.77)	$ (12.68)
Weighted average number of common shares outstanding
Basic (in shares)	36,393	35,689	35,427
Diluted (in shares)	37,271	35,689	35,427
Oil, natural gas and NGL
Revenues
Total revenues	$ 168,882	$ 114,450	$ 266,104
Other
Revenues
Total revenues	$ 0	$ 526	$ 741