Note 5 - Derivative Financial Instruments - Summary of the Effect of Derivatives on the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Noncash derivative gain (loss), net	$ 25,191	$ (12,558)	$ (16,442)	$ (12,558)
Derivative settlements, net	(37,082)	(1,038)	(61,843)	(1,038)
Derivative gain (loss), net	$ (11,891)	$ (13,596)	$ (78,285)	$ (13,596)