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Note 8 - Federal Income Tax - Undistributed Ordinary Income Earnings on a Tax Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Undistributed ordinary income	$ 38,387	$ 38,616	$ 18,813
Long term capital loss carry forward	(137,539)	(102,908)	(73,055)
Unrealized appreciation	14,819	14,935	18,542
Unrealized depreciation	(83,701)	(65,032)	(19,771)
Other temporary differences	13,957	12,547	11,875
Total	$ (154,077)	$ (101,842)	$ (43,596)

X

- Definition

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

+ References

No definition available.

+ Details

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- Definition

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

+ References

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- Definition

Amount of accumulated undistributed earnings (deficit) from other temporary differences of investment company.

+ References

No definition available.

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X

- Definition

Amount of accumulated undistributed earnings (deficit).

+ References

No definition available.

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- Definition

Amount of accumulated undistributed deficit from capital loss carryforward of investment company.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-12

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- Definition

Amount of accumulated undistributed earnings (deficit) from ordinary income (loss) of investment company.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480990/946-20-50-12

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