Note 5 - Derivative Financial Instruments - Price Risk Derivative Contracts (Details) - Not Designated as Hedging Instrument [Member] - Forecast [Member]	2 Months Ended	3 Months Ended
	Dec. 30, 2024 $ / bbl bbl	Sep. 30, 2025 $ / bbl bbl	Jun. 30, 2025 $ / bbl bbl	Mar. 31, 2025 $ / bbl bbl	Sep. 30, 2024 $ / bbl bbl	Jun. 30, 2024 $ / bbl bbl	Mar. 31, 2024 $ / bbl bbl	Dec. 31, 2023 $ / bbl bbl
Crude Oil Derivative Swap [Member]
Barrels Per Day (Barrel of Oil) | bbl	5,500	3,000	5,500	5,500	4,000	4,000	4,000	11,300
Price (in USD per Barrel of Oil)	76.37	75.85	76.37	76.37	84.00	84.00	84.00	77.84
Crude Oil Derivative Collar [Member]
Barrels Per Day (Barrel of Oil) | bbl	10,600	7,000	7,000	8,000	1,500	5,500	6,000	5,000
Floor Strike Price (in USD per Barrel of Oil)	65.68	65.00	65.00	65.00	69.00	69.73	80.00	75.50
Ceiling Price (in USD per Barrel of Oil)	90.32	90.08	90.08	90.00	95.00	95.00	100.00	100.00
Deferred Premium Payable (in USD per Barrel of Oil)	1.85	2.28	2.28	2.12	0.85	0.61		0.35
Crude Oil Derivative Put [Member]
Barrels Per Day (Barrel of Oil) | bbl	2,000	2,000	2,000	2,000	14,000	14,000	20,000	19,000
Floor Strike Price (in USD per Barrel of Oil)	58.00	58.00	58.00	58.00	60.41	60.41	66.44	69.46
Deferred Premium Payable (in USD per Barrel of Oil)	5.00	5.00	5.00	5.00	5.00	5.00	5.00	5.00