Note 17 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Changes in Proved and Unproven Reserves (Details) Mcfe in Thousands	12 Months Ended
	Dec. 31, 2023 MMBoe	Dec. 31, 2023 Mcfe	Dec. 31, 2022 MMBoe	Dec. 31, 2022 MBoe	Dec. 31, 2022 Mcfe	Dec. 31, 2021 MMBoe	Dec. 31, 2021 Mcfe
Proved Reserves (Millions of Barrels of Oil Equivalent)	122,958		64,213			22,515
Beginning proved undeveloped reserves (Millions of Barrels of Oil Equivalent)	61,700
Undeveloped reserves transferred to proved developed (Millions of Barrels of Oil Equivalent)	(25,955)
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	42,440
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)	(1,387)
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	65,148		57,987			44,967
Revisions (Millions of Barrels of Oil Equivalent)	(2,229)
Ending proved undeveloped reserves (Millions of Barrels of Oil Equivalent)	74,569		61,700
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)	171		18,906			2,089
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)	(1,387)					(305)
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(16,093)		(9,211)	(921)		(1,657)
Production (Millions of Barrels of Oil Equivalent)	(16,635)		(8,937)			(3,396)
Proved Reserves (Millions of Barrels of Oil Equivalent)	154,162		122,958			64,213
Oil [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	98,816		51,825			19,032
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	54,137		47,677			36,867
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)	89		13,031			973
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)	(1,171)					(238)
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	(18,432)		(6,155)			(1,807)
Production (Millions of Barrels of Oil Equivalent)	(13,885)		(7,562)			(3,002)
Proved Reserves (Millions of Barrels of Oil Equivalent)	119,554		98,816			51,825
Natural Gas Liquids [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	14,369	14,369	7,378		7,378		2,160
Extensions and discoveries (Millions of Barrels of Oil Equivalent) | Mcfe		6,456			6,162		4,845
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent) | Mcfe		47			3,467		631
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent) | Mcfe		(127)					(44)
Revisions of previous estimates (Millions of Barrels of Oil Equivalent) | Mcfe		898			(1,817)		10
Production (Millions of Barrels of Oil Equivalent) | Mcfe		(1,547)			(821)		(224)
Proved Reserves (Millions of Barrels of Oil Equivalent)	20,096	20,096	14,369		14,369	7,378	7,378
Natural Gas [Member]
Proved Reserves (Millions of Barrels of Oil Equivalent)	58,638	58,638	30,061		30,061	7,939
Extensions and discoveries (Millions of Barrels of Oil Equivalent)	27,330		24,887			19,529
Purchase of reserves-in-place (Millions of Barrels of Oil Equivalent)	208		14,448			2,910
Sales of minerals-in-place (Millions of Barrels of Oil Equivalent)	(531)					(139)
Revisions of previous estimates (Millions of Barrels of Oil Equivalent)	8,644		(7,435)			842
Production (Millions of Barrels of Oil Equivalent)	(7,218)		(3,323)			(1,020)
Proved Reserves (Millions of Barrels of Oil Equivalent)	87,071	87,071	58,638		58,638	30,061	30,061