Note 17 - Supplemental Oil and Natural Gas Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

Cost Incurred in Oil and Gas Property Acquisition, Exploration, and Development Activities Disclosure [Table Text Block]

	2023		2022
	(in thousands)
Proved property acquisition	$	-	$	102,223
Development (1)		5,149		7,808
Exploration		-		-
Total	$	5,149	$	110,031

Capitalized Costs Relating to Oil and Gas Producing Activities Disclosure [Table Text Block]

	2023			2022
	(in thousands)
Oil and Natural Gas Properties:
Unevaluated properties (1):
Unproved leasehold costs	$	-		$	1,584
Evaluated properties in full cost pool		176,679			203,144
Less accumulated depletion and ceiling test impairment (2) (3)		(106,504	)		(96,725	)
Net capitalized costs	$	70,175		$	108,003

Results of Operations for Oil and Gas Producing Activities Disclosure [Table Text Block]

	2023			2022
	(in thousands)
Oil and natural gas sales	$	32,316		$	44,552
Lease operating expense		(15,254	)		(16,667	)
Gathering, treating, and transportation costs		(557	)		(573	)
Production taxes		(2,107	)		(3,010	)
Depletion		(9,779	)		(8,530	)
Income tax benefit		891			1,893
Results of operations from oil and natural gas producing activities	$	5,510		$	17,665

Schedule of Proved Developed and Undeveloped Oil and Gas Reserve Quantities [Table Text Block]

	2023						2022
	Oil			Gas			Oil			Gas
	(bbls)			(mcfe) (1)			(bbls)			(mcfe) (1)
Total proved reserves:
Reserve quantities, beginning of year		5,140,090			16,348,264			1,021,620			1,938,048
Revisions of previous estimates		(822,786	)		(3,421,047	)		(153,434	)		4,066,007
Discoveries and extensions		-			-			-			-
Purchases of minerals in place		-			-			4,777,193			11,753,283
Sale of minerals in place		(742,798	)		(1,448,181	)		(108,833	)		(64,338	)
Production		(391,645	)		(1,396,650	)		(396,456	)		(1,344,736	)
Reserve quantities, end of year		3,182,861			10,082,386			5,140,090			16,348,264

Oil and Gas, Average Sale Price and Production Cost [Table Text Block]

	2023		2022
Oil per Bbl	$	78.22	$	93.67
Gas per Mmbtu	$	2.64	$	6.36

Standardized Measure of Discounted Future Cash Flows Relating to Proved Reserves Disclosure [Table Text Block]

	2023			2022
	(in thousands)
Future cash inflows	$	265,529		$	562,545
Future cash outflows:
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

Schedule of Changes in Standardized Measure of Discounted Future Net Cash Flows [Table Text Block]

	2023			2022
	(in thousands)
Standardized measure, beginning of year	$	143,788		$	19,167
Sales of oil and natural gas, net of production costs		(14,398	)		(24,302	)
Net changes in prices and production costs		(66,494	)		52,053
Changes in estimated future development costs		(4,834	)		(2,860	)
Extensions and discoveries		-			-
Purchases of minerals in place		-			116,673
Sale of minerals in place		(16,055	)		(1,606	)
Revisions in previous quantity estimates		(22,724	)		12,662
Previously estimated development costs incurred		215			-
Net changes in income taxes		25,874			(27,021	)
Accretion of discount		14,759			10,170
Changes in timing and other		151			(11,148	)
Standardized measure, end of year	$	60,282		$	143,788