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Note 17 - Stockholders' Equity - Dividends Declared (Details) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Common Shares (in dollars per share) | $ 0.24 | $ 0.23
Series L Preferred Stock [Member] |  |
Preferred Shares (in dollars per share) | 0.32031 | 0.32031
Series M Preferred Stock [Member] |  |
Preferred Shares (in dollars per share) | 0.32813 | 0.32813
Class N Preferred Stock [Member] |  |
Preferred Shares (in dollars per share) | $ 0.90625 | $ 0

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- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480008/505-10-S99-1 + Details
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