Note 10 - Derivatives and Fair Value (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]

Settlement Period	Type of Contract	Index	Average Monthly Volumes		Weighted Average Put Price		Weighted Average Call Price
			(Bbls)		(per Bbl)		(per Bbl)
January 2023 to March 2023	Collars	Dated Brent		101,000	$	65.00	$	120.00

Settlement Period	Type of Contract	Index	Average Monthly Volumes		Weighted Average Put Price		Weighted Average Call Price
			(Bbls)		(per Bbl)		(per Bbl)
April 2023 to June 2023	Collars	Dated Brent		95,500	$	65.00	$	100.00
July 2023 to September 2023	Collars	Dated Brent		95,500	$	65.00	$	96.00

Schedule of Derivative Instruments [Table Text Block]

		Year Ended December 31,
Derivative Item	Statement of Operations Line	2022			2021			2020
		(in thousands)
Commodity derivatives	Cash settlements paid on matured derivative contracts, net	$	(42,935	)	$	(18,020	)	$	7,216
	Unrealized gain (loss)		5,123			(4,806	)		(639	)
	Derivative instruments gain (loss), net	$	(37,812	)	$	(22,826	)	$	6,577