Note 12 - Earnings Per Common Share - Calculation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Net Income (Loss)	$ (9,980)	$ 26,585	$ 26,674
Preferred stock dividends	(2,156)	(2,156)	(2,156)
Net income (loss) available to common shareholders	$ (12,136)	$ 24,429	$ 24,518
Weighted average number of shares issued, basic and diluted (in shares)	7,606,391	7,522,913	7,529,382
Earnings (loss) per common share:
Basic and diluted earnings (loss) per common share (in dollars per share)	$ (1.6)	$ 3.25	$ 3.26