Note 18 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Changes in Proved Reserves (Details)	4 Months Ended		8 Months Ended	12 Months Ended
	Dec. 31, 2020 MMBoe	Dec. 31, 2020 Mcfe	Aug. 21, 2020 MMBoe Mcfe	Dec. 31, 2021 MMBoe	Dec. 31, 2021 Mcfe
Proved Reserves (Millions of Barrels of Oil Equivalent)	10,274		11,497	22,515
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			50	2,089
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	14,279		1,117	44,967
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(1,603)		(2,120)	(1,658)
Production (Millions of Barrels of Oil Equivalent)	(435)		(270)	(3,396)
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			50	2,089
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)				305
Proved Reserves (Millions of Barrels of Oil Equivalent)	22,515		10,274	64,213
Oil [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	8,633		9,372	19,032
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			44	973
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	11,977		1,008	36,867
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(1,180)		(1,555)	(1,807)
Production (Millions of Barrels of Oil Equivalent)	(398)		(236)	(3,002)
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			44	973
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)				238
Proved Reserves (Millions of Barrels of Oil Equivalent)	19,032		8,633	51,825
Natural Gas Liquids [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)		1,022,000	1,349,000	2,160	2,160,000
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent) | Mcfe			0		631
Extensions and discoveries (Millions of Barrels of Oil Equivalent) | Mcfe		1,433,000	67,000		4,845,000
Revisions of previous estimates (Millions of Barrels of Oil Equivalent) | Mcfe		(277,000)	(374,000)		10,000
Production (Millions of Barrels of Oil Equivalent) | Mcfe		(18,000)	(20,000)		(224,000)
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent) | Mcfe			0		631
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent) | Mcfe					44
Proved Reserves (Millions of Barrels of Oil Equivalent)	2,160	2,160,000	1,022,000	7,378	7,378,000
Natural Gas [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	3,711		4,654	7,939	7,939,000
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			36	2,910
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	5,215		252	19,529
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(875)		(1,144)	842
Production (Millions of Barrels of Oil Equivalent)	(112)		(87)	(1,020)
Purchase of minerals-in-place (Millions of Barrels of Oil Equivalent)			36	2,910
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)				139
Proved Reserves (Millions of Barrels of Oil Equivalent)	7,939	7,939,000	3,711	30,061	30,061,000