Note 18 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Quantities of Proved Developed and Undeveloped Reserves (Details) Mcfe in Thousands, MBoe in Thousands		Dec. 31, 2021 MMBoe	Dec. 31, 2021 Mcfe	Dec. 31, 2021 MBoe	Dec. 31, 2020 MMBoe	Dec. 31, 2020 Mcfe	Dec. 31, 2020 MBoe	Aug. 21, 2020 MMBoe Mcfe	Dec. 31, 2019 MMBoe Mcfe
Proved Developed Reserves (Millions of Barrels of Oil Equivalent)	[1]	28,585			10,282
Proved Undeveloped Reserves (Millions of Barrels of Oil Equivalent)		35,628			12,233
Total Proved Reserves (Millions of Barrels of Oil Equivalent)		64,213			22,515			10,274	11,497
Oil [Member]
Proved Developed Reserves (Millions of Barrels of Oil Equivalent)	[1]	22,610			8,730
Proved Undeveloped Reserves (Millions of Barrels of Oil Equivalent)		29,215			10,302
Total Proved Reserves (Millions of Barrels of Oil Equivalent)		51,825			19,032			8,633	9,372
Natural Gas Liquids [Member]
Proved Developed Reserves (Millions of Barrels of Oil Equivalent)	[1]	3,540			957
Proved Undeveloped Reserves (Millions of Barrels of Oil Equivalent)		3,838			1,203
Total Proved Reserves (Millions of Barrels of Oil Equivalent)		7,378	7,378		2,160	2,160		1,022	1,349
Natural Gas [Member]
Proved Developed Reserves (Millions of Barrels of Oil Equivalent) | Mcfe	[1]		14,611			3,572
Proved Undeveloped Reserves (Millions of Barrels of Oil Equivalent) | MBoe				15,450			4,367
Total Proved Reserves (Millions of Barrels of Oil Equivalent)		30,061	30,061		7,939	7,939		3,711	4,654

[1] As of December 31, 2021 and 2020, proved developed reserves includes proved developed non-producing reserves of 6,884 and 4,517 MBbl of crude oil, 793 and 517 MBbl of NGL and 3,222 and 1,912 MMcf of natural gas, respectively