Note 11 - Stockholders' Equity - Dividends Declared (Details) - Series D Preferred Stock [Member] - $ / shares	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Distributions Declared (in dollars per share)	$ 0	$ 1.17186
O 2026 M1 Dividends [Member]
Distributions Declared (in dollars per share)	0
O 2025 M1 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
O 2026 M2 Dividends [Member]
Distributions Declared (in dollars per share)	0
O 2025 M2 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
O 2026 M3 Dividends [Member]
Distributions Declared (in dollars per share)	0
O 2025 M3 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
O 2026 M4 Dividends [Member]
Distributions Declared (in dollars per share)	0
O 2025 M4 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
O 2026 M5 Dividends [Member]
Distributions Declared (in dollars per share)	0
O 2025 M5 Dividends [Member]
Distributions Declared (in dollars per share)		0.19531
O 2026 M6 Dividends [Member]
Distributions Declared (in dollars per share)	$ 0
O 2025 M6 Dividends [Member]
Distributions Declared (in dollars per share)		$ 0.19531