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Note 8 - Federal Income Tax - Undistributed Ordinary Income Earnings on a Tax Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Undistributed ordinary income	$ 18,813	$ 10,825	$ 6,242
Long term capital loss carry forward	(73,055)	(63,571)	(59,928)
Unrealized appreciation	18,542	12,973	9,578
Unrealized depreciation	(19,771)	(8,738)	(8,545)
Other temporary differences	11,875	7,465	5,983
Total	$ (43,596)	$ (41,046)	$ (46,670)

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Amount of accumulated undistributed earnings (deficit) from unrealized appreciation of investment company.

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Amount of accumulated undistributed deficit from unrealized depreciation of investment company.

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Amount of accumulated undistributed tax basis earnings (deficit).

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