Note 6 - Interest Expense, Net - Components of Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest related to sale of tax benefits	$ 1,991	$ 2,671	$ 6,814	$ 9,487
Interest expense	22,000	17,924	58,801	54,307
Less — amount capitalized	(2,235)	(519)	(6,801)	(978)
Total interest expense, net	$ 21,756	$ 20,076	$ 58,814	$ 62,816