Note 18 - Supplemental Crude Oil and Natural Gas Disclosures (Unaudited) - Standardized Measure of Discounted Future of Net Cash Flows (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Future cash inflows	$ 10,159,310	$ 3,668,535	$ 740,859
Future production costs	(2,289,852)	(824,865)	(217,025)
Future development costs (3)	(983,732)	(432,370)	(117,887)
Future income tax expense	(1,102,156)	(431,737)	(25,824)
Future net cash flows	5,783,570	1,979,563	380,123
Discount to present value at 10% annual rate	(2,367,062)	(860,754)	(157,931)
Standardized measure of discounted future net cash flows (3)	$ 3,416,508	$ 1,118,809	$ 222,192	$ 140,021