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Note 10 - Distributions (Details Textual) - $ / shares | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ 0.33 |  |  |
Earnings Per Share, Basic (in dollars per share) | 0.53 | $ 0.43 | $ 1.54 | $ 1.06
Earnings Per Share, Basic, Undistributed (in dollars per share) | $ 1.23 |  |  |

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