Note 4 - Debt - Interest and Debt Costs Incurred, Net of Interest Capitalized (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total interest and debt costs incurred	$ 17,413	$ 15,607	$ 24,156
Less: interest costs capitalized	(224)	(24)	0
Total interest and debt costs	$ 17,189	$ 15,583	$ 24,156