Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) - Discounted Future Cash Flows From Oil and Gas Reserves (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Future cash inflows	$ 265,529	$ 562,545
Production costs	(142,737)	(227,365)
Development costs	(37,730)	(12,716)
Income taxes	(3,940)	(48,833)
Future net cash flows	81,122	273,631
10% annual discount factor	(20,840)	(129,843)
Standardized measure of discounted future net cash flows	$ 60,282	$ 143,788	$ 19,167

Amount of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for costs to be incurred in developing proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for income tax, based on the future income less future expense derived from production and sale of proved oil and gas reserves.

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Amount, after future accumulated cash outflow for development and production costs and future income tax, of estimated future accumulated cash inflow from the sale of proved oil and gas reserves.

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Amount of estimated future accumulated cash outflow for costs to be incurred in producing proved oil and gas reserves.

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Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of 10 percent a year.

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Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves.

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-Name Form 20-F
-Section Item 18
-Subsection Instruction 2
-Publisher SEC

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