Note 7 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest related to sale of tax benefits	$ 4,081	$ 1,991	$ 9,019	$ 6,814
Interest expense	22,259	22,000	61,579	58,801
Less — amount capitalized	(4,109)	(2,235)	(10,726)	(6,801)
Total interest expense, net	$ 22,230	$ 21,756	$ 59,872	$ 58,814