Note 5 - Derivative Financial Instruments - Price Risk Derivative Contracts (Details) - Not Designated as Hedging Instrument [Member]	12 Months Ended
	Dec. 31, 2022 $ / bbl MBbls
Crude Oil Derivative Swap Q1 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	900.0
Price per Bbl (in USD per Barrel of Oil)	73.67
Deferred Premium Put Options Q1 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	0
Price per Bbl (in USD per Barrel of Oil)	0
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	0
Deferred Premium Put Options Q1 2024 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	455.0
Price per Bbl (in USD per Barrel of Oil)	51.50
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	46.50
Deferred Premium Put Options Q2 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	364.0
Price per Bbl (in USD per Barrel of Oil)	61.05
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	56.05
Deferred Premium Put Options Q2 2024 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	455.0
Price per Bbl (in USD per Barrel of Oil)	51.50
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	46.50
Deferred Premium Put Options Q3 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	644.0
Price per Bbl (in USD per Barrel of Oil)	60.46
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	55.46
Deferred Premium Put Options Q3 2024 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	460.0
Price per Bbl (in USD per Barrel of Oil)	51.50
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	46.50
Crude Oil Derivative Swap Q2 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	546.0
Price per Bbl (in USD per Barrel of Oil)	67.81
Deferred Premium Put Options Q4 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	920.0
Price per Bbl (in USD per Barrel of Oil)	55.97
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	50.97
Deferred Premium Put Options Q4 2024 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	0
Price per Bbl (in USD per Barrel of Oil)	0
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	0
Deferred Premium Put Options 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	1,928.0
Price per Bbl (in USD per Barrel of Oil)	58.43
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	53.43
Deferred Premium Put Options 2024 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	1,370.0
Price per Bbl (in USD per Barrel of Oil)	51.50
Price per Bbl (Net of Premium) (in USD per Barrel of Oil)	46.50
Crude Oil Derivative Swap Q3 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	276.0
Price per Bbl (in USD per Barrel of Oil)	72.30
Crude Oil Derivative Swap Q4 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	0
Price per Bbl (in USD per Barrel of Oil)	0
Crude Oil Derivative Swap 2023 [Member]
Volume (MBbls) (Thousand Barrels of Oil) | MBbls	1,722.0
Price per Bbl (in USD per Barrel of Oil)	71.59