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Note 10 - Distributions (Details Textual) - $ / shares | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share) | $ 0.33 |
Earnings Per Share, Basic (in dollars per share) | 0.46 | $ 0.26
Earnings Per Share, Basic, Undistributed (in dollars per share) | $ 0.81 |

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