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Investments - Company Portfolio by Security and Investment (Details) - USD ($)
$ in Thousands

Dec. 31, 2022

Mar. 31, 2023

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 652,217

$ 620,821

Cost/Amortized Cost

652,217

620,821

Fair Value

576,478

539,122

Fair Value

$ 576,478

$ 539,122

Investment Owned Percent

^[1],[2]

100.00%

100.00%

Aerospace and Defense

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,579

$ 9,697

Fair Value

$ 10,494

$ 9,698

Investment Owned Percent

^[1]

2.00%

2.00%

Asset Management Company

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 17,791

^[3]

$ 17,791

^[4]

Automotive

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

7,329

6,826

Fair Value

$ 6,947

$ 6,422

Investment Owned Percent

^[1]

1.00%

1.00%

Banking, Finance, Insurance & Real Estate

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 76,038

$ 64,526

Fair Value

$ 78,264

$ 66,151

Investment Owned Percent

^[1]

14.00%

12.00%

Beverage, Food and Tobacco

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 12,619

$ 12,602

Fair Value

$ 12,456

$ 12,342

Investment Owned Percent

^[1]

2.00%

2.00%

Capital Equipment

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,681

$ 10,681

Fair Value

$ 2,745

$ 1,609

Investment Owned Percent

^[1]

1.00%

0.00%

Chemicals, Plastics and Rubber

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,447

$ 10,397

Fair Value

$ 10,359

$ 10,193

Investment Owned Percent

^[1]

2.00%

2.00%

CLO Fund Securities

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 34,649

$ 30,860

Fair Value

$ 20,453

$ 19,241

Investment Owned Percent

^[1]

3.00%

4.00%

Construction & Building

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 9,545

$ 9,624

Fair Value

$ 9,199

$ 9,408

Investment Owned Percent

^[1]

2.00%

2.00%

Consumer goods: Durable

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 16,762

$ 16,668

Fair Value

$ 13,943

$ 13,411

Investment Owned Percent

^[1]

2.00%

2.00%

Containers, Packaging and Glass

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 2,754

$ 2,747

Fair Value

$ 2,655

$ 2,667

Investment Owned Percent

^[1]

1.00%

1.00%

Electronics

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,866

$ 10,874

Fair Value

$ 11,129

$ 11,121

Investment Owned Percent

^[1]

2.00%

2.00%

Energy: Electricity

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 671

$ 671

Fair Value

$ 671

$ 671

Investment Owned Percent

^[1]

0.00%

0.00%

Energy: Oil & Gas

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 6,718

$ 6,719

Fair Value

$ 1,056

$ 795

Investment Owned Percent

^[1]

0.00%

0.00%

Environmental Industries

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 4,315

Fair Value

$ 4,930

Investment Owned Percent

^[1]

1.00%

Finance

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 17,570

$ 18,588

Fair Value

$ 17,581

$ 18,593

Investment Owned Percent

^[1]

3.00%

3.00%

Forest Products & Paper

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 1,589

Fair Value

$ 1,373

Investment Owned Percent

^[1]

0.00%

Healthcare, Education and Childcare

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 9,726

$ 6,220

Fair Value

$ 9,586

$ 6,210

Investment Owned Percent

^[1]

2.00%

1.00%

Healthcare & Pharmaceuticals

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 51,901

$ 45,400

Fair Value

$ 50,566

$ 43,549

Investment Owned Percent

^[1]

9.00%

8.00%

High Tech Industries

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 83,661

$ 85,805

Fair Value

$ 73,994

$ 77,471

Investment Owned Percent

^[1]

13.00%

14.00%

Hotel, Gaming & Leisure

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,245

$ 10,425

Fair Value

$ 6,798

$ 3,019

Investment Owned Percent

^[1]

1.00%

1.00%

Joint Venture

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 68,850

$ 74,394

Fair Value

$ 58,955

$ 61,701

Investment Owned Percent

10.00%

^[1]

11.00%

Machinery (Non-Agrclt/Constr/Electr)

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 9,461

$ 9,775

Fair Value

$ 9,291

$ 9,396

Investment Owned Percent

^[1]

2.00%

2.00%

Media: Advertising, Printing & Publishing

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 150

Fair Value

$ 549

Investment Owned Percent

^[1]

0.00%

Media: Broadcasting & Subscription

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 14,930

$ 15,007

Fair Value

$ 14,358

$ 14,490

Investment Owned Percent

^[1]

2.00%

3.00%

Media: Diversified & Production

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 6,976

$ 1,788

Fair Value

$ 6,572

$ 1,800

Investment Owned Percent

^[1]

1.00%

0.00%

Metals & Mining

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 15,846

$ 14,624

Fair Value

$ 14,786

$ 13,717

Investment Owned Percent

^[1]

3.00%

3.00%

Retail

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 10,772

$ 8,804

Fair Value

$ 10,871

$ 8,903

Investment Owned Percent

^[1]

2.00%

2.00%

Services: Business

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 66,807

$ 67,135

Fair Value

$ 66,207

$ 66,302

Investment Owned Percent

^[1]

11.00%

13.00%

Services: Consumer

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 8,569

$ 8,804

Fair Value

$ 8,128

$ 8,612

Investment Owned Percent

^[1]

1.00%

2.00%

Telecommunications

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 11,475

$ 11,497

Fair Value

$ 10,077

$ 10,145

Investment Owned Percent

^[1]

2.00%

2.00%

Textiles and Leather

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 12,689

$ 12,654

Fair Value

$ 12,808

$ 12,766

Investment Owned Percent

^[1]

2.00%

2.00%

Transportation: Cargo

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 11,583

$ 11,578

Fair Value

$ 11,342

$ 11,389

Investment Owned Percent

^[1]

2.00%

2.00%

Transportation: Consumer

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 7,653

$ 7,640

Fair Value

$ 7,335

$ 7,330

Investment Owned Percent

^[1]

1.00%

1.00%

Senior Secured Loan

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 435,856

$ 408,665

Fair Value

$ 418,722

$ 392,022

Investment Owned Percent

^[2]

73.00%

73.00%

Junior Secured Loan

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 65,776

$ 64,319

Fair Value

$ 56,400

$ 50,795

Investment Owned Percent

^[2]

10.00%

9.00%

Senior Unsecured Bond

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 416

$ 416

Fair Value

$ 43

$ 43

Investment Owned Percent

^[2]

0.00%

0.00%

Equity Securities

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 28,848

$ 24,345

Fair Value

$ 21,905

$ 15,320

Investment Owned Percent

^[2]

4.00%

3.00%

CLO Fund Securities

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 34,649

$ 30,860

Fair Value

$ 20,453

$ 19,241

Investment Owned Percent

^[2]

3.00%

4.00%

Asset Manager Affiliates

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

^[4]

$ 17,791

$ 17,791

Joint Ventures

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

68,850

74,394

Fair Value

$ 58,955

$ 61,701

Investment Owned Percent

^[2]

10.00%

11.00%

Derivatives

Summary of Investment Holdings [Line Items]

Cost/Amortized Cost

$ 31

Cost/Amortized Cost

$ 31

[1]	Calculated as a percentage of total portfolio at fair value.
[2]	Represents percentage of total portfolio at fair value.
[3]	Represents the equity investment in the Asset Manager Affiliates
[4]	Represents the equity investment in the Asset Manager Affiliates.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 946
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 5D
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-URI https://asc.fasb.org/extlink&oid=122147990&loc=SL120429264-123010

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