Note 5 - Derivative Financial Instruments - Summary of the Effect of Derivatives on the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	1 Months Ended	2 Months Ended	3 Months Ended	8 Months Ended	9 Months Ended
	Sep. 30, 2020	Aug. 21, 2020	Sep. 30, 2021	Aug. 21, 2020	Sep. 30, 2021
Noncash derivative gain (loss), net	$ (0)	$ 0	$ (6,844)	$ (0)	$ (19,402)
Cash payments on settled derivatives, net	0	0	(3,976)	0	(5,014)
Derivative gain (loss), net	$ 0	$ 0	$ (10,820)	$ 0	$ (24,416)