Note 17 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) (Details Textual) Mcfe in Thousands	12 Months Ended
	Dec. 31, 2024 MMBoe MBoe Mcfe MBbls	Dec. 31, 2024 MMBoe MBoe Mcfe MBbls	Dec. 31, 2024 MMBoe MBoe Mcfe MBbls	Dec. 31, 2024 MMBoe MBoe Mcfe $ / Mcf MBbls	Dec. 31, 2024 MMBoe MBoe Mcfe $ / bbl MBbls	Dec. 31, 2024 MMBoe MBoe Mcfe $ / MMBoe MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe Boe MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe $ / Mcf MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe $ / bbl MBbls	Dec. 31, 2023 MMBoe MBoe Mcfe $ / MMBoe MBbls	Dec. 31, 2022 MMBoe MBoe Mcfe $ / Mcf $ / bbl $ / MMBoe MMcf MBbls	Dec. 31, 2021 MBoe Mcfe
Oil and Gas, Proved Reserve, Quantity, Energy	198,998	198,998	198,998	198,998	198,998	198,998	154,162	154,162	154,162	154,162	154,162	154,162	154,162	122,958	64,213
Oil and Gas, Proved Reserve, Quantity, Energy, Period Increase (Decrease)	45,104						65,148							57,987
Oil and Gas, Exploratory Well Drilled, Production, Gross, Number			18						63					37
Oil and Gas, Exploratory Well Drilled, Production, Net, Number			14.6						56.4					32.1
Oil and Gas, Exploratory Well Drilled, Completion, Gross, Number			5						7					16
Oil and Gas, Exploratory Well Drilled, Completion, Net, Number			5						6.6					14.8
Oil and Gas, Proved Undeveloped Reserves, Well Drilled, Gross, Number			79						117					80
Oil and Gas, Proved Undeveloped Reserves, Well Drilled, Net Productive, Number			68.9						102.4					75.2
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	18,017						(16,093)							(9,211)
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy), Well Performance	19,406						13,729							10,418
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy), Increase in Operating Expenses	804									1,775				1,116
Proved Developed and Undeveloped Reserve, Revision of Previous Estimate (Energy), Price Differentials	585						589							91
Oil and Gas, Proved Reserve, Quantity, Energy, Production	18,285						16,635							8,937
Oil and Gas Reserves Aquired							171							18,906
Oil and Gas Reserves, Proved Reserve Assets Sold							1,387
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	(18,017)						16,093							9,211
Oil and Gas, Proved Undeveloped Reserve, Quantity, Energy	90,879	90,879	90,879	90,879	90,879	90,879	74,569	74,569	74,569	74,569	74,569	74,569	74,569	61,700
Proved Undeveloped Reserves (Energy), Period Increase (Decrease)	16,310
Oil [Member]
Oil and Gas, Average Sale Price Per Unit | $ / bbl					75.48							78.22		93.67
Oil and Gas, Estimated Realized Price | $ / bbl					75.56							78.13		94.59
Oil and Gas, Proved Reserve, Quantity, Energy	135,271	135,271	135,271	135,271	135,271	135,271	119,554	119,554	119,554	119,554	119,554	119,554	119,554	98,816	51,825
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	(5,378)						(18,432)							(6,155)
Oil and Gas, Proved Reserve, Quantity, Energy, Production	13,876						13,885							7,562
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	5,378						18,432							6,155
Oil and Gas, Proved Undeveloped Reserve, Quantity, Energy	69,639	69,639	69,639	69,639	69,639	69,639	60,923	60,923	60,923	60,923	60,923	60,923	60,923	50,971
Natural Gas [Member]
Oil and Gas, Average Sale Price Per Unit | $ / MMBoe						2.13							2.637	6.358
Oil and Gas, Estimated Realized Price				0.072	20.53						0.198	17.33		36.69
Oil and Gas, Proved Reserve, Quantity, Energy | Mcfe	177,654	177,654	177,654	177,654	177,654	177,654	87,071	87,071	87,071	87,071	87,071	87,071	87,071	58,638	30,061
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate | Mcfe		74,854						8,644						(7,435)
Oil and Gas, Proved Reserve, Quantity, Energy, Production | Mcfe		12,747						7,218						3,323
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate | Mcfe		(74,854)						(8,644)						7,435
Oil and Gas, Proved Undeveloped Reserve, Quantity, Energy | Mcfe	59,252	59,252	59,252	59,252	59,252	59,252	34,400	34,400	34,400	34,400	34,400	34,400	34,400	25,969
Natural Gas Liquids (NGL) [Member]
Oil and Gas, Estimated Realized Price | $ / Mcf														4.871
Oil and Gas, Proved Reserve, Quantity, Energy	34,118	34,118	34,118	34,118	34,118	34,118	20,096	20,096	20,096	20,096	20,096	20,096	20,096	14,369	7,378
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	10,919						898							(1,817)
Oil and Gas, Proved Reserve, Quantity, Energy, Production	2,284						1,547							821
Oil and Gas, Proved Reserve, Quantity, Energy, Revision of Previous Estimate	(10,919)						(898)							1,817
Oil and Gas, Proved Undeveloped Reserve, Quantity, Energy | MMBoe	11,365	11,365	11,365	11,365	11,365	11,365	7,913	7,913	7,913	7,913	7,913	7,913	7,913	6,401
Oil Reserves, Non-producing [Member]
Oil and Gas, Proved Developed Reserve, Quantity, Volume | MBbls	6,239	6,239	6,239	6,239	6,239	6,239	4,598	4,598	4,598	4,598	4,598	4,598	4,598	7,417
Natural Gas Liquids Reserves, Non-producing [Member]
Oil and Gas, Proved Developed Reserve, Quantity, Volume | MBbls	1,044	1,044	1,044	1,044	1,044	1,044	534	534	534	534	534	534	534	927
Natural Gas Reserves, Non-producing [Member]
Oil and Gas, Proved Developed Reserve, Quantity, Volume	5,668	5,668	5,668	5,668	5,668	5,668	1,889	1,889	1,889	1,889	1,889	1,889	1,889	3,641