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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