Quarterly report pursuant to Section 13 or 15(d)

Note 9 - Common Dividends, Dividend Equivalents and Distributions - Common Dividends, Dividend Equivalents and Distributions Declared (Details)

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Note 9 - Common Dividends, Dividend Equivalents and Distributions - Common Dividends, Dividend Equivalents and Distributions Declared (Details) - USD ($)
9 Months Ended
Sep. 15, 2021
Aug. 11, 2021
Jun. 30, 2021
Mar. 15, 2021
Feb. 27, 2021
Sep. 30, 2021
Amount per Share (in dollars per share) $ 0.12 $ 0.12 $ 0.24 $ 0.08 $ 0.15  
Dividends, Dividend Equivalents and Distributions Paid Date Oct. 15, 2021 Aug. 12, 2021 Jul. 15, 2021 Mar. 29, 2021 Mar. 22, 2021  
Dividends, Dividend Equivalents and Distributions Amount $ 2,617,967 $ 2,149,253 $ 4,276,968 $ 809,665 $ 1,518,070 $ 11,371,923