Note 18 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Changes in Proved and Unproven Reserves (Details) Mcfe in Thousands	4 Months Ended			8 Months Ended			12 Months Ended
	Dec. 31, 2020 MMBoe	Dec. 31, 2020 MBoe	Dec. 31, 2020 Mcfe	Aug. 21, 2020 MMBoe	Aug. 21, 2020 MBoe	Aug. 21, 2020 Mcfe	Dec. 31, 2022 MMBoe	Dec. 31, 2022 MBoe	Dec. 31, 2022 Mcfe	Dec. 31, 2021 MMBoe	Dec. 31, 2021 MBoe	Dec. 31, 2021 Mcfe
Beginning proved undeveloped reserves (Millions of Barrels of Oil Equivalent)							35,628
Undeveloped reserves transferred to proved developed (Millions of Barrels of Oil Equivalent)							(15,446)
Revisions (Millions of Barrels of Oil Equivalent)							(3,178)
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)							7,302
Extensions and discoveries (Millions of Barrels of Oil Equivalent)							37,394
Proved Reserves (Millions of Barrels of Oil Equivalent)	10,274	10,274		11,497			64,213	64,213		22,515	22,515
Ending proved undeveloped reserves (Millions of Barrels of Oil Equivalent)							61,700			35,628
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)				50	50		18,906			2,089
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	14,279			1,117	1,117		57,987			44,967
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(1,603)	(1,603)		(2,120)	(2,120)		(9,211)	(9,211)		(1,657)	(1,657)
Production (Millions of Barrels of Oil Equivalent)	(435)	(435)		(270)	(270)		(8,937)	(8,937)		(3,396)	(3,396)
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)										305
Proved Reserves (Millions of Barrels of Oil Equivalent)	22,515	22,515		10,274	10,274		122,958	122,958		64,213	64,213
Oil [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	8,633			9,372			51,825			19,032
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)				44			13,031			973
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	11,977			1,008			47,677			36,867
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(1,180)			(1,555)			(6,155)			(1,807)
Production (Millions of Barrels of Oil Equivalent)	(398)			(236)			(7,562)			(3,002)
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)										238
Proved Reserves (Millions of Barrels of Oil Equivalent)	19,032			8,633			98,816			51,825
Natural Gas Liquids [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)			1,022	1,349		1,349	7,378		7,378	2,160		2,160
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent) | Mcfe						0			3,467			631
Extensions and discoveries (Millions of Barrels of Oil Equivalent) | Mcfe			1,433			67			6,162			4,845
Revisions of previous estimates (Millions of Barrels of Oil Equivalent) | Mcfe			(277)			(374)			(1,817)			10
Production (Millions of Barrels of Oil Equivalent) | Mcfe			(18)			(20)			(821)			(224)
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			1,022	14,369		14,369	7,378		7,378
Natural Gas [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	3,711			4,654		4,654	30,061		30,061	7,939		7,939
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)				36			14,448			2,910
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	5,215			252			24,887			19,529
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(875)			(1,144)			(7,435)			842
Production (Millions of Barrels of Oil Equivalent)	(112)			(87)			(3,323)			(1,020)
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)										139
Proved Reserves (Millions of Barrels of Oil Equivalent)	7,939		7,939	3,711			58,638		58,638	30,061		30,061