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Note 11 - Stockholders' Equity - Dividends Declared (Details) - Series D Preferred Stock [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Distributions Declared (in dollars per share) | $ 2.34372 | $ 2.34372
O 2024 M1 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M1 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M2 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M2 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M3 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M3 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M4 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M4 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M5 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M5 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M6 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M6 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M7 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M7 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M8 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M8 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M9 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M9 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M10 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M10 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M11 Dividends [Member] |  |
Distributions Declared (in dollars per share) | 0.19531 |
O 2023 M11 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | 0.19531
O 2024 M12 Dividends [Member] |  |
Distributions Declared (in dollars per share) | $ 0.19531 |
O 2023 M12 Dividends [Member] |  |
Distributions Declared (in dollars per share) |  | $ 0.19531

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