Note 18 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Changes in Standardized Measure of Discounted Future (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Standardized measure of discounted future net cash flows, beginning of year	$ 1,118,809	$ 222,192	$ 140,021
Sales of crude oil and natural gas, net of production costs	(647,647)	(184,325)	(15,648)
Extensions and discoveries, net of future development costs (3)	1,785,822	987,689	172,478
Net changes in prices and production costs	909,053	272,889	(50,728)
Changes in estimated future development costs (3)	(23,647)	(13,551)	6,466
Purchases of minerals-in-place	499,478	31,353	600
Sales of reserves-in-place	0	(3,067)	0
Revisions of previous quantity estimates	(354,868)	(40,466)	(41,646)
Accretion of discount	134,338	23,419	14,134
Net changes in income taxes (1)	(315,478)	(212,574)	(10,675)
Net changes in timing of production and other	310,648	35,250	7,190
Standardized measure of discounted future net cash flows, end of year (3)	$ 3,416,508	$ 1,118,809	$ 222,192