Note 14 - Earnings and Dividends Per Share - Reconciliation Between Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income	$ 6,624	$ 16,753
Basic and diluted income per share (in dollars per share)	$ 0.44	$ 1.12
Basic and diluted shares used in computing earnings per share (in shares)	14,921,968	14,921,968