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Note 5 - Transactions With Affiliated Companies - Investments in Controlled Affiliated Companies (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Net unrealized (depreciation) appreciation on investments		$ 3,442	$ 3,376	$ 1,169	$ 8,122
Net realized (loss) gain on investments		(8,585)	$ 1,344	(9,484)	(2,372)
HESP LLC [Member]
Fair value				0	1,500	$ 1,500
Purchases				0		0
Reductions				(300)		(50)
Transfers				0		0
Net unrealized (depreciation) appreciation on investments				1,450		(1,450)
Net realized (loss) gain on investments				(1,150)		0
Fair value		0		0		0
Dividend income				0		0
Dividends declared				0		0
Controlled Affiliate [Member]
Fair value				0	1,500	1,500
Purchases				0		0
Reductions				(300)		(50)
Transfers				0		0
Net unrealized (depreciation) appreciation on investments				1,450		(1,450)
Net realized (loss) gain on investments				(1,150)		0
Fair value		$ 0		0		0
Dividend income				0		0
Dividends declared				0		0
Other Affiliates [Member]
Fair value				0	7,547	7,547
Purchases						800
Reductions						(3,583)
Transfers						(3,538)
Discount accretion						12
Net unrealized (depreciation) appreciation on investments						(848)
Net realized (loss) gain on investments						(390)
Fair value						0
Dividend income						252
Other Affiliates [Member] | First Decisyon Inc. Investment [Member]
Fair value	[1]			0	1,181	1,181
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(1,181)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					41
Other Affiliates [Member] | Second Decisyon Inc. Investment [Member]
Fair value	[1]			0	626	626
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(638)
Discount accretion	[1]					12
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					21
Other Affiliates [Member] | Third Decisyon Inc. Investment [Member]
Fair value	[1]			0	227	227
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(227)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					7
Other Affiliates [Member] | Fourth Decisyon Inc. Investment [Member]
Fair value	[1]			0	228	228
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(228)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					7
Other Affiliates [Member] | Fifth Decisyon Inc. Investment [Member]
Fair value	[1]			0	685	685
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(685)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					22
Other Affiliates [Member] | Sixth Decisyon Inc. Investment [Member]
Fair value	[1]			0	276	276
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(276)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					9
Other Affiliates [Member] | Seventh Decisyon Inc. Investment [Member]
Fair value	[1]			0	183	183
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(183)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					6
Other Affiliates [Member] | Eighth Decisyon Inc. Investment [Member]
Fair value	[1]			0	120	120
Purchases	[1]					0
Reductions	[1]					0
Transfers	[1]					(120)
Discount accretion	[1]					0
Net unrealized (depreciation) appreciation on investments	[1]					0
Net realized (loss) gain on investments	[1]					0
Fair value	[1]					0
Dividend income	[1]					0
Other Affiliates [Member] | First MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				0	2,382	2,382
Purchases						0
Reductions						(2,783)
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						0
Net realized (loss) gain on investments						401
Fair value						0
Dividend income						139
Other Affiliates [Member] | Second MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				0	0	0
Purchases						250
Reductions						(250)
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						0
Net realized (loss) gain on investments						0
Fair value						0
Dividend income						0
Other Affiliates [Member] | Third MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				0	0	0
Purchases						70
Reductions						(70)
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						0
Net realized (loss) gain on investments						0
Fair value						0
Dividend income						0
Other Affiliates [Member] | Fourth MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				0	0	0
Purchases						330
Reductions						(330)
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						0
Net realized (loss) gain on investments
Fair value						0
Dividend income						0
Other Affiliates [Member] | Fifth MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				0	0	0
Purchases						150
Reductions						(150)
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						0
Net realized (loss) gain on investments						0
Fair value						0
Dividend income						0
Other Affiliates [Member] | Sixth MVI (ABC) LLC fka StereoVision, Inc. Investment [Member]
Fair value				$ 0	$ 1,639	1,639
Purchases						0
Reductions						0
Transfers						0
Discount accretion						0
Net unrealized (depreciation) appreciation on investments						(848)
Net realized (loss) gain on investments						(791)
Fair value						0
Dividend income						$ 0
[1] As of December 31, 2021, the Company no longer owns 5% or more of the portfolio company.

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+ References

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