Note 17 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Standardized Measure of Discounted Future of Net Cash Flows (Details) - USD ($) $ in Thousands		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Future cash inflows		$ 9,706,290		$ 10,159,310		$ 3,668,535
Future production costs		(2,869,377)		(2,289,852)		(824,865)
Future development costs (3)	[1]	(1,568,033)		(983,732)		(432,370)
Future income tax expense		(680,894)		(1,102,156)		(431,737)
Future net cash flows		4,587,986		5,783,570		1,979,563
Discount to present value at 10% annual rate		(1,980,282)		(2,367,062)		(860,754)
Standardized measure of discounted future net cash flows (3)		$ 2,607,704	[1]	$ 3,416,508	[1]	$ 1,118,809	[1]	$ 222,192

[1] The standardized measure of discounted future net cash flows reflects, within the category for future development costs, all estimated future costs that will be incurred to settle our asset retirement obligations, including costs for dismantlement, restoration, and abandonment of the existing wells (including both active and inactive wells on leases and future proved undeveloped locations), in each case in compliance with FASB ASC 932-235-50-36.