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Note 8 - Financial Instruments With Off-balance-sheet Risk - Unfunded Commitments (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Unfunded commitments, principal balance	$ 181,750	$ 190,000
Fair value of unfunded commitment liability	2,036	1,761
BrightInsight, Inc. [Member]
Unfunded commitments, principal balance	18,250	21,000
Fair value of unfunded commitment liability	241	278
Britecore Holdings, Inc. [Member]
Unfunded commitments, principal balance	5,000	5,000
Fair value of unfunded commitment liability	72	66
Candesant Biomedical Corporation [Member]
Unfunded commitments, principal balance	10,000	0
Fair value of unfunded commitment liability	151	0
Castle Creek Biosciences [Member]
Unfunded commitments, principal balance	4,000	4,000
Fair value of unfunded commitment liability	72	72
Divergent Technologies, Inc. [Member]
Unfunded commitments, principal balance	11,250	22,500
Fair value of unfunded commitment liability	118	236
Elligo Healthcare Research, Inc. [Member]
Unfunded commitments, principal balance	15,000	0
Fair value of unfunded commitment liability	194	0
Engage3, LLC [Member]
Unfunded commitments, principal balance	0	8,000
Fair value of unfunded commitment liability	0	40
Groundspeed Analytics, Inc. [Member]
Unfunded commitments, principal balance	0	15,000
Fair value of unfunded commitment liability	0	150
Hound Labs, Inc. [Member]
Unfunded commitments, principal balance	0	7,500
Fair value of unfunded commitment liability	0	88
KSQ Therapeutics, Inc. [Member]
Unfunded commitments, principal balance	0	10,000
Fair value of unfunded commitment liability	0	100
Lytics, Inc. [Member]
Unfunded commitments, principal balance	4,000	5,000
Fair value of unfunded commitment liability	52	65
Mirantis, Inc [Member]
Unfunded commitments, principal balance	15,000	0
Fair value of unfunded commitment liability	136	0
Native Microbials, Inc. [Member]
Unfunded commitments, principal balance	0	7,500
Fair value of unfunded commitment liability	0	72
Noodle Partners, Inc. [Member]
Unfunded commitments, principal balance	5,000	0
Fair value of unfunded commitment liability	61	0
Optoro, Inc. [Member]
Unfunded commitments, principal balance	6,250	15,000
Fair value of unfunded commitment liability	0	38
PDS Biotechnology Corporation [Member]
Unfunded commitments, principal balance	0	10,000
Fair value of unfunded commitment liability	0	158
Robin Healthcare, Inc. [Member]
Unfunded commitments, principal balance	0	10,000
Fair value of unfunded commitment liability	0	100
SafelyYou, Inc [Member]
Unfunded commitments, principal balance	20,000	0
Fair value of unfunded commitment liability	270	0
Scientia Vascular, Inc. [Member]
Unfunded commitments, principal balance	5,000	10,000
Fair value of unfunded commitment liability	55	110
Slingshot Aerospace, Inc. [Member]
Unfunded commitments, principal balance	0	5,000
Fair value of unfunded commitment liability	0	64
Sonex Health, Inc. [Member]
Unfunded commitments, principal balance	15,000	0
Fair value of unfunded commitment liability	176	0
Supply Network Visibility Holdings, LLC [Member]
Unfunded commitments, principal balance	10,000	0
Fair value of unfunded commitment liability	35	0
Swift Health Systems Inc. [Member]
Unfunded commitments, principal balance	11,500	25,500
Fair value of unfunded commitment liability	0	105
Tallac Therapeutics, Inc [Member]
Unfunded commitments, principal balance	10,000	0
Fair value of unfunded commitment liability	229	0
Temperpack Technologies, Inc [Member]
Unfunded commitments, principal balance	6,500	9,000
Fair value of unfunded commitment liability	14	19
Viken Detection Corporation [Member]
Unfunded commitments, principal balance	10,000	0
Fair value of unfunded commitment liability	$ 160	$ 0

X

- Definition

The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

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- Definition

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

+ References

No definition available.

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