Note 8 - Dividends Declared and Paid (Details Textual) - $ / shares	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Common Stock, Dividends, Per Share, Declared (in dollars per share)	$ 0.09	$ 0.07
Distribution Made to Limited Partner, Distributions Declared, Per Unit (in dollars per share)	0.09	0.07
Preferred Stock, Dividends Per Share, Declared (in dollars per share)	0.41406	0.41406
Series A Preferred Stock [Member]
Preferred Stock, Dividends Per Share, Declared (in dollars per share)	$ 0.41406	$ 0.41406
Preferred Stock, Dividend Rate, Percentage	6.625%	6.625%