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Note 4 - Investments (Tables)

6 Months Ended

Jun. 30, 2026

Notes Tables

Investment Holdings, Schedule of Investments [Table Text Block]

		June 30, 2026								December 31, 2025
		Cost				Fair Value				Cost				Fair Value
		(In thousands)
Investments
Debt		$	682,425			$	647,999			$	602,488			$	596,025
Warrants			15,155				16,703				14,868				16,648
Other			37,962				4,037				45,258				3,444
Equity			42,110				7,757				42,655				31,127
Equity interest in RoHo Joint Venture			215				215				—				—
Total investments		$	777,867			$	676,711			$	705,269			$	647,244

		June 30, 2026								December 31, 2025
		Cost				Fair Value				Cost				Fair Value
		(In thousands)
Life Science
Biotechnology		$	117,812			$	86,231			$	94,280			$	61,829
Medical Device			230,456				232,913				227,893				222,485
Technology
Communications			6,286				7,459				522				3,142
Consumer-Related			30,840				19,800				31,204				21,846
Data Storage			417				197				417				230
Internet and Media			329				78				329				151
Networking			364				—				364				—
Software			237,700				228,691				199,608				190,911
Sustainability
Alternative Energy			—				—				4,914				4,905
Energy Efficiency			125				15				125				9
Other Sustainability			57,406				18,223				50,321				49,315
Healthcare Information and Services
Diagnostics			12,001				10,560				11,553				11,369
Other			38,889				30,041				38,668				34,508
Software			45,027				42,288				45,071				46,544
Investment funds
RoHo Capital Opportunity Fund LLC			215				215				—				—
Total investments		$	777,867			$	676,711			$	705,269			$	647,244

Investment Company, Nonconsolidated Subsidiary, Summarized Financial Information [Table Text Block]

		June 30,
		2026
Assets
Investments in money market funds			200
Contributions receivable			430
Total assets		$	630
Liabilities
Other liabilities			630
Total liabilities			630
Commitments and contingencies
Members’ Capital
Members’ capital			—
Total members’ capital			—
Total liabilities and members’ capital		$	630

		For the three months				For the period March 18,
		ended				2026 through
		June 30, 2026
		(In thousands)
Selected Statements of Operations Information
Total investment income		$	—			$	—
Total expenses		$	430			$	430
Net investment income		$	(430	)		$	(430	)
Net decrease in net assets resulting from operations		$	(430	)		$	(430	)

X

- Definition

Tabular disclosure of summarized financial information for nonconsolidated subsidiary of investment company. Excludes information consolidated by reporting entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(i))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

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- Definition

Tabular disclosure of data and information required in the supplementary schedule applicable to management investment companies listing holdings of unaffiliated investments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-6

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-6

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-6

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (a)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-6

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-6

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
-SubTopic 210
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478795/946-210-50-1

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